reuse: Specifies the reuse threshold in the range of 200 to 20000. The default value is 750. The reuse threshold must be less than the suppression threshold.

suppress: Specifies the suppression threshold in the range of 200 to 20000. The default value is 2000.

max-suppress-time: Specifies the maximum amount of time the interface can be dampened, in the range of 1 to 255 seconds. The default value is 162 seconds (three times the half-life timer).

Usage guidelines

When configuring the dampening command, follow these rules to set the values mentioned above:

· The ceiling is equal to 2 (Max-suppress-time/Decay) × reuse-limits. It is not user configurable.

· The configured suppress limit is lower than or equal to the ceiling.

· The ceiling is lower than or equal to the maximum suppress limit supported.

This command, the link-delay command, and the port link-flap protect enable command are mutually exclusive on an interface.

This command does not take effect on the administratively down events. When you execute the shutdown command, the penalty restores to 0, and the interface reports the down event to the higher layer protocols.

Do not enable the dampening function on an interface with MSTP enabled.

After an interface in down state is dampened, the interface state displayed through the display interface command, MIB, or Web is always down.

Examples

# Enable interface dampening on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] dampening

# Enable interface dampening on HundredGigE 1/0/1, and set the following parameters:

· Half life time to 2 seconds.

· Reuse value to 800.

· Suppression threshold to 3000.

· Maximum suppression interval to 5 seconds.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] dampening 2 800 3000 5

Related commands

display interface

link-delay

port link-flap protect enable

display ethernet statistics

Use display ethernet statistics to display the Ethernet module statistics.

Syntax

display ethernet statistics slot slot-number

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

slot slot-number: Specifies the slot number of the device, which is fixed at 1.

Examples

# Display the Ethernet module statistics for the specified slot.

<Sysname> display ethernet statistics slot 1

ETH receive packet statistics:

Totalnum : 10447 ETHIINum : 4459

SNAPNum : 0 RAWNum : 0

LLCNum : 0 UnknownNum : 0

ForwardNum : 4459 ARP : 0

MPLS : 0 ISIS : 0

ISIS2 : 0 IP : 0

IPV6 : 0

ETH receive error statistics:

NullPoint : 0 ErrIfindex : 0

ErrIfcb : 0 IfShut : 0

ErrAnalyse : 5988 ErrSrcMAC : 5988

ErrHdrLen : 0

ETH send packet statistics:

L3OutNum : 211 VLANOutNum : 0

FastOutNum : 155 L2OutNum : 0

ETH send error statistics:

MbufRelayNum : 0 NullMbuf : 0

ErrAdjFwd : 0 ErrPrepend : 0

ErrHdrLen : 0 ErrPad : 0

ErrQoSTrs : 0 ErrVLANTrs : 0

ErrEncap : 0 ErrTagVLAN : 0

IfShut : 0 IfErr : 0

Table 1 Output description

Field	Description
ETH receive packet statistics	Statistics about the Ethernet packets received by the Ethernet module: · Totalnum—Total number of received packets. · ETHIINum—Number of packets encapsulated by using Ethernet II. · SNAPNum—Number of packets encapsulated by using SNAP. · RAWNum—Number of packets encapsulated by using RAW. · ISISNum—Number of packets encapsulated by using ISIS. · LLCNum—Number of packets encapsulated by using LLC. · UnknownNum—Number of packets encapsulated by using unknown methods. · ForwardNum—Number of packets forwarded at Layer 2 or sent to the CPU. · ARP—Number of ARP packets. ‌ · MPLS—Number of MPLS packets. This field is not supported in the current software version.‌‌ · ISIS—Number of IS-IS packets. · ISIS2—Number of large 802.3/802.2 frames encapsulated by using IS-IS. · IP—Number of IP packets. · IPv6—Number of IPv6 packets.
ETH receive error statistics	Statistics about the error Ethernet packets in the inbound direction on the Ethernet module. Errors might be included in packets or occur during the receiving process. The items include: · NullPoint—Number of packets that include null pointers. · ErrIfindex—Number of packets that include incorrect interface indexes. · ErrIfcb—Number of packets that include incorrect interface control blocks. · IfShut—Number of packets that are being received when the interface is shut down. · ErrAnalyse—Number of packets that include packet parsing errors. · ErrSrcMAC—Number of packets that include incorrect source MAC addresses. · ErrHdrLen—Number of packets that include header length errors.
ETH send packet statistics	Statistics about the Ethernet packets sent by the Ethernet module: · L3OutNum—Number of packets sent out of Layer 3 Ethernet interfaces. · VLANOutNum—Number of packets sent out of VLAN interfaces. · FastOutNum—Number of packets fast forwarded. · L2OutNum—Number of packets sent out of Layer 2 Ethernet interfaces.
ETH send error statistics	Statistics about the error Ethernet packets in the outbound direction on the Ethernet module: · MbufRelayNum—Number of packets transparently sent. · NullMbuf—Number of packets with null pointers. · ErrAdjFwd—Number of packets with adjacency table errors. It is not supported in the current software version. · ErrPrepend—Number of packets with extension errors. · ErrHdrLen—Number of packets with header length errors. · ErrPad—Number of packets with padding errors. · ErrQoSTrs—Number of packets that failed to be sent by QoS. · ErrVLANTrs—Number of packets that failed to be sent in VLANs. · ErrEncap—Number of packets that failed to be sent due to link header encapsulation failures. · ErrTagVLAN—Number of packets that failed to be sent due to VLAN tag encapsulation failures. · IfShut—Number of packets that are being sent when the interface is shut down. · IfErr—Number of packets with incorrect outgoing interfaces.

‌

Related commands

reset ethernet statistics

display interface

Use display interface to display interface information.

Syntax

display interface [ interface-type [ interface-number | interface-number.subnumber ] ] [ brief [ description | down ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

interface-type: Specifies an interface type.

interface-number: Specifies an interface number.

interface-number.subnumber: Specifies a subinterface number. The interface-number argument is an interface number. The subnumber argument is the number of a subinterface created under the interface. The value range for the subnumber argument is 1 to 4094.

brief: Displays brief interface information. If you do not specify this keyword, the command displays detailed interface information.

description: Displays complete interface descriptions. If you do not specify this keyword, the command displays only the first 25 characters of each interface description.

down: Displays information about interfaces in down state and the causes. If you do not specify this keyword, the command displays information about interfaces in all states.

Usage guidelines

If you do not specify an interface type, this command displays information about all interfaces.

If you specify an interface type but do not specify an interface number, this command displays information about all interfaces of the specified type.

Examples

# Display information about Layer 3 interface HundredGigE 1/0/1.

<Sysname> display interface hundredgige 1/0/1

HundredGigE1/0/1

Current state: DOWN

Line protocol state: DOWN

Description: HundredGigE1/0/1 Interface

Bandwidth: 100000000 kbps

Maximum transmission unit: 1500

Allow jumbo frames to pass

Internet protocol processing: Disabled

IP packet frame type: Ethernet II, hardware address: 0000-fc00-d219

IPv6 packet frame type: Ethernet II, hardware address: 0000-fc00-d219

Loopback is not set

Media type is not sure, port hardware type is No connector

Port priority: 0

Unknown-speed mode, unknown-duplex mode

Link speed type is autonegotiation, link duplex type is autonegotiation

Flow-control is not enabled

The Maximum Frame Length is 9216

Last link flapping: Never

Last hardware down reason: -

Last clearing of counters: 15:11:41 Tue 09/25/2018

Current system time:2018-09-25 15:22:24

Last time when physical state changed to up:-

Last time when physical state changed to down:2018-09-25 15:07:58

Peak input rate: 0 bytes/sec, at 2018-09-25 15:11:43

Peak output rate: 0 bytes/sec, at 2018-09-25 15:11:43

Last 300 seconds input: 0 packets/sec 0 bytes/sec -%

Last 300 seconds output: 0 packets/sec 0 bytes/sec -%

Traffic statistic: Include Inter-frame Gaps and Preambles

Input (total): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Input (normal): 0 packets, - bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Input: 0 input errors, 0 runts, 0 giants, 0 throttles

0 CRC, 0 frame, - overruns, 0 aborts

- ignored, - parity errors

Output (total): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Output (normal): 0 packets, - bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Output: 0 output errors, - underruns, - buffer failures

0 aborts, 0 deferred, 0 collisions, 0 late collisions

0 lost carrier, - no carrier

IPv4 traffic statistics:

Last 300 seconds input rate: 0 packets/sec, 0 bytes/sec

Last 300 seconds output rate: 0 packets/sec, 0 bytes/sec

Input: 0 packets, 0 bytes

Output: 0 packets, 0 bytes

IPv6 traffic statistics:

Last 300 seconds input rate: 0 packets/sec, 0 bytes/sec

Last 300 seconds output rate: 0 packets/sec, 0 bytes/sec

Input: 0 packets, 0 bytes

Output: 0 packets, 0 bytes

# Display detailed information about Layer 2 interface HundredGigE 1/0/1.

<Sysname> display interface hundredgige 1/0/1

HundredGigE1/0/1

Current state: DOWN

Line protocol state: DOWN

IP packet frame type: Ethernet II, hardware address: 000c-2963-b767

Description: HundredGigE1/0/1 Interface

Bandwidth: 100000000 kbps

Loopback is not set

Media type is not sure, port hardware type is No connector

Unknown-speed mode, unknown-duplex mode

Link speed type is autonegotiation, link duplex type is autonegotiation

Flow-control is not enabled

Maximum frame length: 9216

Allow jumbo frames to pass

PVID: 1

MDI type: Automdix

Dampening enabled:

Penalty: 0 (not suppressed)

Ceiling: 6000

Reuse: 750

Suppress: 2000

Half-life: 54 seconds

Max-suppress-time: 162 seconds

Flap count: 0

Port link-type: Access

Tagged VLANs: None

Untagged VLANs: 1

Port priority: 0

Last link flapping: Never

Last hardware down reason: -

Last clearing of counters: Never

Current system time:2018-09-25 15:25:05

Last time when physical state changed to up:-

Last time when physical state changed to down:2018-09-25 15:24:05

Peak input rate: 0 bytes/sec, at 2018-09-25 15:24:08

Peak output rate: 0 bytes/sec, at 2018-09-25 15:24:08

Last 300 seconds input: 0 packets/sec 0 bytes/sec -%

Last 300 seconds output: 0 packets/sec 0 bytes/sec -%

Traffic statistic: Include Inter-frame Gaps and Preambles

Input (total): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Input (normal): 0 packets, - bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Input: 0 input errors, 0 runts, 0 giants, 0 throttles

0 CRC, 0 frame, - overruns, 0 aborts

- ignored, - parity errors

Output (total): 0 packets, 0 bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Output (normal): 0 packets, - bytes

0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses

Output: 0 output errors, - underruns, - buffer failures

0 aborts, 0 deferred, 0 collisions, 0 late collisions

0 lost carrier, - no carrier

IPv4 traffic statistics:

Last 300 seconds input rate: 0 packets/sec, 0 bytes/sec

Last 300 seconds output rate: 0 packets/sec, 0 bytes/sec

Input: 0 packets, 0 bytes

Output: 0 packets, 0 bytes

IPv6 traffic statistics:

Last 300 seconds input rate: 0 packets/sec, 0 bytes/sec

Last 300 seconds output rate: 0 packets/sec, 0 bytes/sec

Input: 0 packets, 0 bytes

Output: 0 packets, 0 bytes

Table 2 Command output

Field	Description
Current state	Physical link state of the interface: · Administratively DOWN—The interface has been shut down by using the shutdown command. · DOWN—The interface is administratively up, but its physical state is down (possibly because no physical link exists or the link has failed). · DOWN ( Link-Aggregation interface down )—The aggregate interface to which the interface belongs has been shut down by using the shutdown command. · DOWN ( Monitor Link )—The interface has been shut down by Monitor Link. · Link-Flap DOWN—The interface has been shut down by the link flapping protection feature. · mac-address moving down—The interface has been shut down by the MAC address move suppression feature. · Storm-Constrain—The interface has been shut down because the storm control feature detected that unknown unicast traffic, multicast traffic, or broadcast traffic exceeded the upper threshold. · STP DOWN—The interface has been shut down by the BPDU guard feature. · M-LAG MAD Shutdown—The interface was set to the M-LAG MAD DOWN state when the M-LAG system split. · UP—The interface is both administratively and physically up.
Line protocol state	Data link layer state of the interface. The state is determined through automatic parameter negotiation at the data link layer. · UP—The data link layer protocol is up. · UP (spoofing)—The data link layer protocol is up, but the link is an on-demand link or does not exist. This attribute is typical of null interfaces and loopback interfaces. · DOWN—The data link layer protocol is down. · DOWN (protocols)—The data link layer has been shut down by protocols included in the parentheses. Available protocols include: ¡ LAGG—Shuts down the data link layer when it detects that the aggregate interface does not have Selected ports. ¡ BFD—Shuts down the data link layer when it detects a link failure.
Bandwidth	Expected bandwidth of the interface.
Maximum transmission unit	MTU of the interface.
Internet protocol processing	IP packet processing capability of the interface when the interface is not assigned an IP address: · Disabled—The interface cannot process IP packets. · Enabled—The interface can process IP packets.
Internet address: ip-address/mask-length (Type)	IP address of the interface and type of the address in parentheses. Possible IP address types include: · Primary—Manually configured primary IP address. · Sub—Manually configured secondary IP address. If the interface has both primary and secondary IP addresses, the primary IP address is displayed. If the interface has only secondary IP addresses, the lowest secondary IP address is displayed. · DHCP-allocated—DHCP allocated IP address. For more information, see DHCP client configuration in Layer 3—IP Services Configuration Guide. · BOOTP-allocated—BOOTP allocated IP address. For more information, see BOOTP client configuration in Layer 3—IP Services Configuration Guide. · Unnumbered—IP address borrowed from another interface.
IP packet frame type	IPv4 packet framing format.
hardware address	MAC address of the interface.
IPv6 packet frame type	IPv6 packet framing format.
Port priority	Port priority of the interface.
Loopback is set internal	An internal loopback test is running on the interface. This field depends on your configuration.
Loopback is not set	No loopback test is running on the interface. This field depends on your configuration.
10Gbps-speed mode	The interface is operating at 10 Gbps. This field depends on your configuration and the link parameter negotiation result.
25Gbps-speed mode	The interface is operating at 25 Gbps. This field depends on your configuration and the link parameter negotiation result.
40Gbps-speed mode	The interface is operating at 40 Gbps. This field depends on your configuration and the link parameter negotiation result.
100Gbps-speed mode	The interface is operating at 100 Gbps. This field depends on your configuration and the link parameter negotiation result.
200Gbps-speed mode	The interface is operating at 200 Gbps. This field depends on your configuration and the link parameter negotiation result.
400Gbps-speed mode	The interface is operating at 400 Gbps. This field depends on your configuration and the link parameter negotiation result.
Unknown-speed mode	The speed of the interface is unknown because the speed negotiation fails or the interface is physically disconnected.
full-duplex mode	The interface is operating in full duplex mode. This field depends on your configuration and the link parameter negotiation result.
unknown-duplex mode	The duplex mode of the interface is unknown because the duplex mode negotiation fails or the interface is physically disconnected.
Link speed type is autonegotiation	The interface is configured with the speed auto command.
Link speed type is force link	The interface is manually configured with a speed (for example, 1000 Mbps) by using the speed command.
link duplex type is autonegotiation	The interface is configured with the duplex auto command.
link duplex type is force link	The interface is manually configured with a duplex mode (for example, half or full) by using the duplex command.
Flow-control is not enabled	Generic flow control is disabled on the interface. This field depends on your configuration and the link parameter negotiation result.
Maximum frame length	Maximum length of Ethernet frames allowed to pass through the interface.
Allow jumbo frame to pass	The interface allows jumbo frames to pass through.
PVID	Port VLAN ID (PVID) of the interface.
MDI type	MDIX mode of the interface: · automdix. · mdi. · mdix.
Port link-type	Link type of the interface: · access. · trunk. · hybrid.
Tagged VLANs	VLANs for which the interface sends packets without removing VLAN tags.
Untagged VLANs	VLANs for which the interface sends packets after removing VLAN tags.
VLAN Passing	VLANs whose packets can be forwarded by the port. The VLANs must have been created.
VLAN permitted	VLANs whose packets are permitted by the port.
Trunk port encapsulation	Encapsulation protocol type for the trunk port.
Last link flapping	The amount of time that has elapsed since the most recent physical state change of the interface. This field displays Never if the interface has been physically down since device startup.
Last hardware down reason	Reason for which the interface hardware went down: · Electrical signal loss on the receiving side of the interface. · Interface MAC exception. · Interface physical exception. · Interface transceiver module exception. · Invalid interface configuration. · MAC down because the remote interface is faulty. · No optical signal has been received at the optical port. · Optical signal loss on the receiving side of the interface. · Remote loopback is down. · PHY line side is down. · PHY system side is down. · Rx loss of signal occurred on the transceiver module. · SDH branch unit pointer loss alarm occurred. · SDH indication signal of branch unit alarm occurred. · SDH loss of frame alarm occurred. · SDH loss of signal alarm occurred. · SDH multiplex section indication alarm occurred. · SDH multiplex section remote defect indication alarm occurred. · SDH signal fault bit error rate threshold alarm occurred. · SDH signal degrade bit error rate threshold alarm occurred. · The interface auto-negotiation process is not completed. · The interface is manually shut down. · The interface receives the local fault from the peer device. · The interface receives the remote fault from the peer device. · The LAN/WAN mode of the interface has been changed. · The MAC layer state of the interface changes to down. · The PHY layer state of the interface changes to down. · The physical layer of the interface is disabled. · The subcard is absent. · The subcard is not initialized. · The transceiver module is absent. · The transceiver module transmission function of the interface is disabled. · Transceiver module is not ready. · Hyphen (-)—Unknown reason.
Last clearing of counters	Time when the reset counters interface command was last used to clear the interface statistics. This field displays Never if the reset counters interface command has never been used on the interface since device startup.
Current system time	Current system date and time, which is displayed in the YYYY-MM-DD hh:mm:ss format by default. If the time zone is configured, this field is in the YYYY-MM-DD hh:mm:ss zone-name±hh:mm:ss format, where the zone-name argument is the local time zone name.
Last time when physical state changed to up	Last date and time when the physical state of the interface changed to up, which is displayed in the YYYY-MM-DD hh:mm:ss format by default. If the time zone is configured, this field is in the YYYY-MM-DD hh:mm:ss zone-name±hh:mm:ss format, where the zone-name argument is the local time zone name. If the physical state of the interface has never changed to up, this field displays a hyphen (-).
Last time when physical state changed to down	Last date and time when the physical state of the interface changed to down, which is displayed in the YYYY-MM-DD hh:mm:ss format by default. If the time zone is configured, this field is in the YYYY-MM-DD hh:mm:ss zone-name±hh:mm:ss format, where the zone-name argument is the local time zone name. If the physical state of the interface has never changed to down, this field displays a hyphen (-).
Last 300 seconds input: 0 packets/sec 0 bytes/sec 0% Last 300 seconds output: 0 packets/sec 0 bytes/sec 0%	Average inbound or outbound traffic rate (in pps and Bps) in the last 300 seconds, and the ratio of the actual rate to the interface bandwidth. A hyphen (-) indicates that the statistical item is not supported.
Traffic statistic	When inter-frame gaps and preambles are included when average rate statistics are collected for an interface: · Include Inter-frame Gaps and Preambles. · Not include Inter-frame Gaps and Preambles.
Input(total): 0 packets, 0 bytes 0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses	The two fields on the first line represent the inbound traffic statistics (in packets and bytes) for the interface. All inbound normal packets, abnormal packets, and normal pause frames were counted. The four fields on the second line represent: · Number of inbound unicast packets. · Number of inbound broadcasts. · Number of inbound multicasts. · Number of inbound pause frames. A hyphen (-) indicates that the statistical item is not supported.
Input(normal): 0 packets, 0 bytes 0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses	The two fields on the first line represent the inbound normal traffic and pause frame statistics (in packets and bytes) for the interface. The four fields on the second line represent: · Number of inbound normal unicast packets. · Number of inbound normal broadcasts. · Number of inbound normal multicasts. · Number of inbound normal pause frames. A hyphen (-) indicates that the statistical item is not supported.
input errors	Statistics of incoming error packets.
runts	Number of inbound frames meeting the following conditions: · Shorter than 64 bytes. · In correct format. · Containing valid CRCs.
giants	Number of inbound giants. Giants refer to frames larger than the maximum frame length supported on the interface. For an Ethernet interface that does not permit jumbo frames, the maximum frame length is as follows: · 1532 bytes (without VLAN tags). · 1536 bytes (with VLAN tags). For an Ethernet interface that permits jumbo frames, the maximum Ethernet frame length is set when you configure jumbo frame support on the interface.
throttles	Number of inbound frames that had a non-integer number of bytes.
CRC	Total number of inbound frames that had a normal length, but contained CRC errors.
frame	Total number of inbound frames that contained CRC errors and a non-integer number of bytes.
overruns	Number of packets dropped because the input rate of the port exceeded the queuing capability.
aborts	Total number of illegal inbound packets: · Fragment frames—CRC error frames shorter than 64 bytes. The length (in bytes) can be an integral or non-integral value. · Jabber frames—CRC error frames greater than the maximum frame length supported on the Ethernet interface (with an integral or non-integral length). ¡ For an Ethernet interface that does not permit jumbo frames, the maximum frame length is 1532 bytes (without VLAN tags) or 1536 bytes (with VLAN tags). ¡ For an Ethernet interface that permits jumbo frames, the maximum Ethernet frame length is set when you configure jumbo frame support on the interface. · Symbol error frames—Frames that contained a minimum of one undefined symbol. · Unknown operation code frames—Non-pause MAC control frames. · Length error frames—Frames whose 802.3 length fields did not match the actual frame length (46 to 1500 bytes).
ignored	Number of inbound frames dropped because the receiving buffer of the port ran low.
parity errors	Total number of frames with parity errors.
Output(total): 0 packets, 0 bytes 0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses	The two fields on the first line represent the outbound traffic statistics (in packets and bytes) for the interface. All outbound normal packets, abnormal packets, and normal pause frames were counted. The four fields on the second line represent: · Number of outbound unicast packets. · Number of outbound broadcasts. · Number of outbound multicasts. · Number of outbound pause frames. A hyphen (-) indicates that the statistical item is not supported.
Output(normal): 0 packets, 0 bytes 0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses	The two fields on the first line represent the outbound normal traffic and pause frame statistics (in packets and bytes) for the interface. The four fields on the second line represent: · Number of outbound normal unicast packets. · Number of outbound normal broadcasts. · Number of outbound normal multicasts. · Number of outbound normal pause frames. A hyphen (-) indicates that the statistical item is not supported.
output errors	Number of outbound packets with errors.
underruns	Number of packets dropped because the output rate of the interface exceeded the output queuing capability. This is a low-probability hardware anomaly.
buffer failures	Number of packets dropped because the transmitting buffer of the interface ran low.
aborts	Number of packets that failed to be transmitted, for example, because of Ethernet collisions.
deferred	Number of frames that the interface deferred to transmit because of detected collisions.
collisions	Number of frames that the interface stopped transmitting because Ethernet collisions were detected during transmission.
late collisions	Number of frames that the interface deferred to transmit after transmitting their first 512 bits because of detected collisions.
lost carrier	Number of carrier losses during transmission. This counter increases by one when a carrier is lost, and applies to serial WAN interfaces.
no carrier	Number of times that the port failed to detect the carrier when attempting to send frames. This counter increases by one when a port failed to detect the carrier, and applies to serial WAN interfaces.
Peak input rate	Peak rate of inbound traffic in Bps, and the time when the peak inbound traffic rate occurred.
Peak output rate	Peak rate of outbound traffic in Bps, and the time when the peak outbound traffic rate occurred.
IPv4 traffic statistics	IPv4 packet statistics.
IPv6 traffic statistics	IPv6 packet statistics.
Last 300 seconds input rate: 0 packets/sec, 0 bytes/sec	Average inbound traffic rate (in pps and Bps) in the last 300 seconds. A hyphen (-) indicates that the statistical item is not supported.
Last 300 seconds output rate: 0 packets/sec, 0 bytes/sec	Average outbound traffic rate (in pps and Bps) in the last 300 seconds. A hyphen (-) indicates that the statistical item is not supported.
Input: 0 packets, 0 bytes	Inbound traffic statistics (in packets and bytes) for the interface. A hyphen (-) indicates that the statistical item is not supported.
Output: 0 packets, 0 bytes	Outbound traffic statistics (in packets and bytes) for the interface. A hyphen (-) indicates that the statistical item is not supported.

‌

# Display brief information about all interfaces.

<Sysname> display interface brief

Brief information on interfaces in route mode:

Link: ADM - administratively down; Stby - standby

Protocol: (s) – spoofing

Interface Link Protocol Primary IP Description

HGE1/0/1 DOWN DOWN --

Loop0 UP UP(s) 2.2.2.9

NULL0 UP UP(s) --

Vlan1 UP DOWN --

Vlan999 UP UP 192.168.1.42

Brief information on interfaces in bridge mode:

Link: ADM - administratively down; Stby - standby

Speed: (a) - auto

Duplex: (a)/A - auto; H - half; F - full

Type: A - access; T - trunk; H - hybrid

Interface Link Speed Duplex Type PVID Description

HGE1/0/2 DOWN auto A A 1

HGE1/0/3 UP auto F(a) A 1 aaaaaaaaaaaaaaaaaaaaaaaaaaa

# Display brief information about HundredGigE 1/0/3, including the complete description of the interface.

<Sysname> display interface hundredgige 1/0/3 brief description

Brief information on interfaces in bridge mode:

Link: ADM - administratively down; Stby - standby

Speed: (a) - auto

Duplex: (a)/A - auto; H - half; F - full

Type: A - access; T - trunk; H - hybrid

Interface Link Speed Duplex Type PVID Description

HGE1/0/3 UP auto F(a) A 1 aaaaaaaaaaaaaaaaaaaaaaaaaaaaa

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

# Display information about interfaces in DOWN state and the causes.

<Sysname> display interface brief down

Brief information on interfaces in route mode:

Link: ADM - administratively down; Stby - standby

Interface Link Cause

HGE1/0/1 DOWN Not connected

Vlan2 DOWN Not connected

Brief information on interfaces in bridge mode:

Link: ADM - administratively down; Stby - standby

Interface Link Cause

HGE1/0/2 DOWN Not connected

Table 3 Command output

Field	Description
Brief information on interfaces in route mode:	Brief information about Layer 3 interfaces.
Interface	Interface name.
Link	Physical link state of the interface: · UP—The interface is physically up. · DOWN—The interface is physically down. · ADM—The interface has been shut down by using the shutdown command. To restore the physical state of the interface, use the undo shutdown command. · Stby—The interface is a backup interface in standby state.
Protocol	Data link layer protocol state of the interface: · UP—The data link layer protocol of the interface is up. · DOWN—The data link layer protocol of the interface is down. · UP(s)—The data link layer protocol of the interface is up, but the link is an on-demand link or does not exist. The (s) attribute represents the spoofing flag. This value is typical of null interfaces and loopback interfaces.
Primary IP	Primary IP address of the interface. This field displays two hyphens (--) if the interface does not have an IP address.
Description	Description of the interface.
Brief information of interfaces in bridge mode:	Brief information about Layer 2 interfaces.
Type: A - access; T - trunk; H – hybrid	Link type options for interfaces.
Speed	Speed of the interface, in bps. This field displays the (a) flag next to the speed if the speed is automatically negotiated. This field displays auto if the interface is configured to autonegotiate its speed but the autonegotiation has not started.
Duplex	Duplex mode of the interface: · A—Autonegotiation. The interface is configured to autonegotiate its duplex mode but the autonegotiation has not started. · F—Full duplex. · F(a)—Autonegotiated full duplex. · H—Half duplex. · H(a)—Autonegotiated half duplex.
Type	Link type of the interface: · A—Access. · H—Hybrid. · T—Trunk.
PVID	Port VLAN ID.
Cause	Cause for the physical link state of an interface to be DOWN: · Administratively—The interface has been manually shut down by using the shutdown command. To restore the physical state of the interface, use the undo shutdown command. · DOWN ( Link-Aggregation interface down )—The interface is a member port of an aggregate interface, and the aggregate interface is down. · DOWN (Loopback detection down)—The loopback detection module has detected loops. · DOWN ( Monitor-Link uplink down )—The monitor link module has detected that the uplink is down. · Not connected—No physical connection exists (possibly because the network cable is disconnected or faulty). · Storm-Constrain—The storm control feature has detected that unknown unicast traffic, multicast traffic, or broadcast traffic exceeded the upper threshold. · STP DOWN—The interface has been shut down by the BPDU guard feature. · Port Security Disabled—The interface has been shut down by the intrusion detection mechanism, because the interface received illegal packets. This option is not supported in the current software version.

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Related commands

reset counters interface

display lbn-group status

Use display lbn-group status to display LBN group information.

Syntax

display lbn-group status

Views

System view

Predefined user roles

network-admin

network-operator

Example

# Display LBN group information.

<System> display lbn-group status

Global lbn-group configuration: Enable

GroupName GroupIndex Index Interface

Leaf1 1 0 HundredGigE1/0/2

HundredGigE1/0/1

Leaf 2 0 HundredGigE1/0/3

HundredGigE1/0/4

Table 4 Command output

Field	Description
Global lbn-group configuration	Status of the LBN group feature: · Disable · Enable
GroupName	Name of the LBN group.
GroupIndex	Index of an interface in the LBN group.
Index	Index of the LBN group.
Interface	Name of the interface.

Related commands

group-member interface

display link-flap protection

Use display link-flap protection to display information about link flapping protection on an interface.

Syntax

display link-flap protection [ interface interface-type [ interface-number ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

interface-type: Specifies an interface type. If you do not specify an interface type, the command displays information about link flapping protection on all interfaces.

interface-number: Specifies an interface number. If you do not specify an interface number, the command displays information about link flapping protection on all interfaces of the specified type.

Examples

# Display information about link flapping protection on an interface.

<Sysname> display link-flap protection

Link-flap protection: Enabled

Interface Link-flap Status Interval Threshold

HGE1/0/1 Enabled Down 10 5

HGE1/0/2 Disabled N/A -- --

Table 5 Command output

Field	Description
Link-flap protection	Status of link flapping protection on all interfaces: · Enabled—Link flapping protection is enabled on all interfaces. · Disabled—Link flapping protection is disabled on all interfaces.
Link-flap	Status of link flapping protection on an interface: · Enabled—Link flapping protection is enabled on an interface. · Disabled—Link flapping protection is disabled on an interface. · Unconfig—Link flapping protection is not configured on an interface.
Status	Status of an interface: · Down—The interface has been shut down by the link flapping protection feature. · N/A—The interface status is not affected by the link flapping protection feature.
Interval	Link flapping detection interval for an interface.
Threshold	Link flapping detection threshold for an interface.

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Related commands

link-flap protect enable

port link-flap protect enable

display link-state-change statistics interface

Use display link-state-change statistics interface to display the physical link state change statistics of interfaces.

Syntax

display link-state-change statistics interface [ interface-type [ interface-number ] ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

interface-type: Specifies an interface type.

interface-number: Specifies an interface number.

Usage guidelines

If you do not specify an interface type, this command displays the link state change statistics for all up interfaces that have traffic counters.

If you specify an interface type but do not specify an interface number, this command displays the link state change statistics for all interfaces of the specified type.

Examples

# Display the link state change statistics of all interfaces.

<Sysname> display link-state-change statistics interface

Interface Change-times Last-change-time Reset link-state time

Link-flap-begin Link-flap-end

HGE1/0/1 0 Never Never

Never Never

Table 6 Command output

Field	Description
Interface	Abbreviated interface name.
Change-times	Number of physical state changes.
Last-change-time	Last time when the physical state changed.
Reset link-state time	Time when the physical link state change statistics were cleared.
Link-flap-begin	Last time when a physical link state flapping began. If no link state flapping has occurred, this field displays Never.
Link-flap-end	Last time when a physical link state flapping ended. If no link state flapping has occurred, this field displays Never.

Related commands

reset link-state-change statistics interface

display packet-drop

Use display packet-drop to display information about packets dropped on an interface.

Syntax

display packet-drop { interface [ interface-type [ interface-number ] ] | summary }

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

interface-type: Specifies an interface type.

interface-number: Specifies an interface number.

summary: Displays the summary of dropped packets on only interfaces that support this command.

Usage guidelines

If you do not specify an interface type, this command displays information about dropped packets on only interfaces that support this command on the device.

If you specify an interface type but do not specify an interface number, this command displays information about dropped packets on only interfaces of the specified type that support this command.

Examples

# Display information about dropped packets on HundredGigE 1/0/1.

<Sysname> display packet-drop interface hundredgige 1/0/1

HundredGigE1/0/1:

Packets dropped due to full GBP or insufficient bandwidth: 301

Packets dropped due to Fast Filter Processor (FFP): 261

Packets dropped due to STP non-forwarding state: 0

Packets dropped due to insufficient data buffer. Input dropped: 0 Output dropped:0

Packets of ECN marked: 0

Packets of WRED dropped: 0

# Display the summary of dropped packets on only interfaces that support this command.

<Sysname> display packet-drop summary

All interfaces:

Packets dropped due to full GBP or insufficient bandwidth: 301

Packets dropped due to Fast Filter Processor (FFP): 261

Packets dropped due to STP non-forwarding state: 0

Packets dropped due to insufficient data buffer. Input dropped: 0 Output dropped:0

Packets of ECN marked: 0

Packets of WRED dropped: 0

Table 7 Command output

Field	Description
Packets dropped due to full GBP or insufficient bandwidth	Packets that are dropped because the buffer is used up or the bandwidth is insufficient.
Packets dropped due to Fast Filter Processor (FFP)	Packets that are filtered out.
Packets dropped due to STP non-forwarding state	Packets that are dropped because STP is in the non-forwarding state.
Packets dropped due to insufficient data buffer. Input dropped: 0 Output dropped:0	Inbound and outbound packets that are dropped due to insufficient data buffer.
Packets of ECN marked	Packets with the ECN field set to 11 because WRED queue thresholds are reached. For more information about WRED and ECN, see ACL and QoS Configuration Guide.
Packets of WRED dropped	Packets that are dropped because the WRED queue thresholds are reached.

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duplex

Use duplex to set the duplex mode for an Ethernet interface.

Use undo duplex to restore the default.

Syntax

duplex { auto | full | half }

undo duplex

Default

Ethernet interfaces operate in autonegotiation mode.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

auto: Configures the interface to autonegotiate the duplex mode with the peer.

full: Configures the interface to operate in full duplex mode. In this mode, the interface can receive and transmit packets simultaneously.

half: Configures the interface to operate in half duplex mode. In this mode, the interface can only receive or transmit packets at a given time. This keyword is supported only on management Ethernet interfaces.

Examples

# Configure HundredGigE 1/0/1 to operate in full duplex mode.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] duplex full

flow-control

Use flow-control to enable TxRx-mode generic flow control on an Ethernet interface.

Use undo flow-control to disable TxRx-mode generic flow control on the Ethernet interface.

Syntax

flow-control

undo flow-control

Default

TxRx-mode generic flow control is disabled on an Ethernet interface.

Views

Ethernet interface view

Predefined user roles

network-admin

Usage guidelines

With TxRx-mode generic flow control configured, an interface can both send and receive flow control frames:

· When congested, the interface sends a flow control frame to its peer.

· Upon receiving a flow control frame from the peer, the interface suspends sending packets.

To implement flow control on a link, enable generic flow control at both ends of the link.

Examples

# Enable TxRx-mode generic flow control on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] flow-control

flow-control receive enable

Use flow-control receive enable to enable Rx-mode generic flow control on an Ethernet port.

Use undo flow-control to disable Rx-mode generic flow control on an Ethernet port.

Syntax

flow-control receive enable

undo flow-control

Default

Rx-mode generic flow control is disabled on Ethernet interfaces.

Views

Ethernet interface view

Predefined user roles

network-admin

Usage guidelines

With Rx-mode flow control enabled, an interface can receive but cannot send flow control frames.

· When the interface receives a flow control frame from its peer, it suspends sending packets to the peer.

· When traffic congestion occurs on the interface, it cannot send flow control frames to the peer.

To handle unidirectional traffic congestion on a link, configure the flow-control receive enable command at one end, and the flow-control command at the other. To enable both ends of the link to handle traffic congestion, configure the flow-control command at both ends.

Examples

# Enable Rx-mode generic flow control on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-hundredgige 1/0/1] flow-control receive enable

Related commands

flow-control

flow-interval

Use flow-interval to set the statistics polling interval.

Use undo flow-interval to restore the default.

Syntax

flow-interval interval

undo flow-interval

Default

The statistics polling interval is 300 seconds.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

interval: Sets the statistics polling interval in seconds. The interval is in the range of 5 to 300 and must be a multiple of 5.

Examples

# Set the statistics polling interval to 100 seconds on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] flow-interval 100

group-member interface

Use group-member interface to assign interfaces to an LBN group.

Use undo group-member interface to remove interfaces from an LBN group.

Syntax

group-member interface interface-type interface-number [ to interface-type interface-number ]

undo group-member interface interface-type interface-number [ to interface-type interface-number ]

group-member interface interface-type interface-number index index-value

undo group-member interface interface-type interface-number index index-value

Views

LBN group view

Default

An LBN group does not contain any interfaces.

Predefined user roles

network-admin

Parameters

interface-type interface-number: Specifies an interface by its type and number.

to: Specifies the end member interface number. If you do not specify this keyword, this command assigns a single interface to an LBN group.

index-value: Specifies an interface by its index, in the range of 0 to 63.

Usage guidelines

You can specify an index to assign an interface with the specified index to an LBN group or specify a list of interfaces to allow the device to automatically assign indexes to the interfaces and assign the interfaces in bulk to an LBN group.

When the device automatically assigns indexes to interfaces, it allocates the smallest current index to the first interface configured at the CLI. Then, it assigns indexes to the remaining interfaces in ascending order of their interface numbers.

As a best practice, do not manually specify an index. If you specify a list of non-contiguous interface indexes, the traffic outgoing interfaces will become discontinuous, causing unbalanced traffic. If you have to manually specify an index, do that under guidance of professionals. If removing an interface from an LBN group results in discontinuous interface indexes, you must manually adjust the indexes to have them become continuous again.

You can assign only physical interfaces to an LBN group, and the interfaces must be incoming interfaces.

IRF physical ports cannot be assigned to an LBN group.

An interface can belong to only one LBN group.

The display ip load-sharing path command does not take effect on an interface in an LBN group.

If you specify a list of interfaces, make sure the two interfaces before and after the to keyword are the same type.

Example

# Assign interfaces HundredGigE 1/2/1 through HundredGigE 1/0/4 to LBN group Leaf1.

<Sysname> system-view

[Sysname] lbn-group Leaf1

[Sysname-lbn-group-Leaf1] group-member interface HundredGigE1/0/1 to HundredGigE1/0/4

# Assign interface HundredGigE 1/0/1 with index 3 to LBN group Leaf1.

<Sysname> system-view

[Sysname] lbn-group Leaf1

[Sysname-lbn-group-Leaf1] group-member interface HundredGigE1/0/1 index 3

ifmonitor crc-error

Use ifmonitor crc-error to configure global CRC error packet alarm parameters.

Use undo ifmonitor crc-error to restore the default.

Syntax

ifmonitor crc-error slot slot-number high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo ifmonitor crc-error slot slot-number

Default

The upper threshold is 1000, the lower threshold is 100, and the statistics collection and comparison interval is 10 seconds for CRC error packet alarms.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for CRC error packet alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for CRC error packet alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for CRC error packets, in the range of 1 to 65535 seconds.

shutdown: Shuts down an interface when the number of incoming CRC error packets on the interface exceeds the upper threshold. Then, the interface stops forwarding all packets. To recover the interface, execute the undo shutdown command on the interface. If you do not specify this keyword, an upper threshold exceeding alarm is generated and the interface enters the alarm state when the number of incoming CRC error packets exceeds the upper threshold on the interface.

slot slot-number: Specifies the slot number of the device, which is fixed at 1.

Usage guidelines

With the CRC error packet alarm function enabled, when the number of incoming CRC error packets on an interface in normal state within the specified interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the number of incoming CRC error packets on an interface in the alarm state within the specified interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can configure the CRC error packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5000, lower threshold to 400, and statistics collection and comparison interval to 6 seconds for CRC error packet alarms.

<Sysname> system-view

[Sysname] ifmonitor crc-error slot 1 high-threshold 5000 low-threshold 400 interval 6

Related commands

snmp-agent trap enable ifmonitor

ifmonitor giant

Use ifmonitor giant to configure global giant packet alarm parameters.

Use undo ifmonitor giant to restore the default.

Syntax

ifmonitor giant slot slot-number high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo ifmonitor giant slot slot-number

Default

The upper threshold is 1000, the lower threshold is 100, and the statistics collection and comparison interval is 10 seconds for giant packet alarms.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for giant packet alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for giant packet alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for giant packets, in the range of 1 to 65535 seconds.

shutdown: Shuts down an interface when the number of incoming giant packets on the interface exceeds the upper threshold. Then, the interface stops forwarding all packets. To recover the interface, execute the undo shutdown command on the interface. If you do not specify this keyword, an upper threshold exceeding alarm is generated and the interface enters the alarm state when the number of incoming giant packets exceeds the upper threshold on the interface.

slot slot-number: Specifies the slot number of the device, which is fixed at 1.

Usage guidelines

With the giant packet alarm function enabled, when the number of incoming giant packets on an interface in normal state within the specified interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the number of incoming giant packets on an interface in the alarm state within the specified interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can configure the giant packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5, lower threshold to 4, and statistics collection and comparison interval to 6 seconds for giant packet alarms.

<Sysname> system-view

[Sysname] ifmonitor giant slot 1 high-threshold 5 low-threshold 4 interval 6

Related commands

port ifmonitor giant

snmp-agent trap enable ifmonitor

ifmonitor input-error

Use ifmonitor input-error to configure global input error packet alarm parameters.

Use undo ifmonitor input-error to restore the default.

Syntax

ifmonitor input-error slot slot-number high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo ifmonitor input-error slot slot-number

Default

The upper threshold is 1000, the lower threshold is 100, and the statistics collection and comparison interval is 10 seconds for input error packet alarms.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for input error packet alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for input error packet alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for input error packets, in the range of 1 to 65535 seconds.

shutdown: Shuts down an interface when the number of input error packets on the interface exceeds the upper threshold. Then, the interface stops forwarding all packets. To recover the interface, execute the undo shutdown command on the interface. If you do not specify this keyword, an upper threshold exceeding alarm is generated and the interface enters the alarm state when the number of input error packets exceeds the upper threshold on the interface.

slot slot-number: Specifies the slot number of the device, which is fixed at 1.

Usage guidelines

With the input error packet alarm function enabled, when the number of input error packets on an interface in normal state within the specified interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the number of input error packets on an interface in the alarm state within the specified interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can configure the input error packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5000, lower threshold to 400, and statistics collection and comparison interval to 6 seconds for input error packet alarms.

<Sysname> system-view

[Sysname] ifmonitor input-error slot 1 high-threshold 5000 low-threshold 400 interval 6

Related commands

snmp-agent trap enable ifmonitor

ifmonitor input-usage

Use ifmonitor input-usage to configure global input bandwidth usage alarm parameters.

Use undo ifmonitor input-usage to restore the default.

Syntax

ifmonitor input-usage slot slot-number high-threshold high-value low-threshold low-value

undo ifmonitor input-usage slot slot-number

Default

The upper threshold is 90, and the lower threshold is 80.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for input bandwidth usage alarms, in the range of 1 to 100.

low-threshold low-value: Specifies the lower threshold for input bandwidth usage alarms, in the range of 1 to 100.

slot slot-number: Specifies the slot number of the device, which is fixed at 1.

Usage guidelines

With the input bandwidth usage alarm function enabled, when the input bandwidth usage on an interface in normal state within the most recent statistics polling interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the input bandwidth usage on an interface in the alarm state within the most recent statistics polling interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can use the flow-interval command to set the statistics polling interval.

You can configure the input bandwidth usage alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

For this command to take effect, you must use the snmp-agent trap enable ifmonitor command to enable the input bandwidth usage alarm function.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 95 and lower threshold to 80 for input bandwidth usage alarms.

<Sysname> system-view

[Sysname] ifmonitor input-usage slot 1 high-threshold 95 low-threshold 80

Related commands

flow-interval

snmp-agent trap enable ifmonitor

ifmonitor output-error

Use ifmonitor output-error to configure global output error packet alarm parameters.

Use undo ifmonitor output-error to restore the default.

Syntax

ifmonitor output-error slot slot-number high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo ifmonitor output-error slot slot-number

Default

The upper threshold is 1000, the lower threshold is 100, and the statistics collection and comparison interval is 10 seconds for output error packet alarms.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for output error packet alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for output error packet alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for output error packets, in the range of 1 to 65535 seconds.

shutdown: Shuts down an interface when the number of output error packets on the interface exceeds the upper threshold. Then, the interface stops forwarding all packets. To recover the interface, execute the undo shutdown command on the interface. If you do not specify this keyword, an upper threshold exceeding alarm is generated and the interface enters the alarm state when the number of output error packets exceeds the upper threshold on the interface.

slot slot-number: Specifies the slot number of the device, which is fixed at 1.

Usage guidelines

With the output error packet alarm function enabled, when the number of output error packets on an interface in normal state within the specified interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the number of output error packets on an interface in the alarm state within the specified interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can configure the output error packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5000, lower threshold to 400, and statistics collection and comparison interval to 6 seconds for output error packet alarms.

<Sysname> system-view

[Sysname] ifmonitor output-error slot 1 high-threshold 5000 low-threshold 400 interval 6

Related commands

snmp-agent trap enable ifmonitor

ifmonitor output-usage

Use ifmonitor output-usage to configure global output bandwidth usage alarm parameters.

Use undo ifmonitor output-usage to restore the default.

Syntax

ifmonitor output-usage slot slot-number high-threshold high-value low-threshold low-value

undo ifmonitor output-usage slot slot-number

Default

The upper threshold is 90, and the lower threshold is 80.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for output bandwidth usage alarms, in the range of 1 to 100.

low-threshold low-value: Specifies the lower threshold for output bandwidth usage alarms, in the range of 1 to 100.

slot slot-number: Specifies the slot number of the device, which is fixed at 1.

Usage guidelines

With the output bandwidth usage alarm function enabled, when the output bandwidth usage on an interface in normal state within the most recent statistics polling interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the output bandwidth usage on an interface in the alarm state within the most recent statistics polling interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can use the flow-interval command to set the statistics polling interval.

You can configure the output bandwidth usage alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

For this command to take effect, you must use the snmp-agent trap enable ifmonitor command to enable the output bandwidth usage alarm function.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 80 and lower threshold to 60 for output bandwidth usage alarms.

<Sysname> system-view

[Sysname] ifmonitor output-usage slot 1 high-threshold 80 low-threshold 60

Related commands

flow-interval

snmp-agent trap enable ifmonitor

ifmonitor runt

Use ifmonitor runt to configure global runt packet alarm parameters.

Use undo ifmonitor runt to restore the default.

Syntax

ifmonitor runt slot slot-number high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo ifmonitor runt slot slot-number

Default

The upper threshold is 1000, the lower threshold is 100, and the statistics collection and comparison interval is 10 seconds for runt packet alarms.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for runt packet alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for runt packet alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for runt packets, in the range of 1 to 65535 seconds.

shutdown: Shuts down an interface when the number of incoming runt packets on the interface exceeds the upper threshold. Then, the interface stops forwarding all packets. To recover the interface, execute the undo shutdown command on the interface. If you do not specify this keyword, an upper threshold exceeding alarm is generated and the interface enters the alarm state when the number of incoming runt packets exceeds the upper threshold on the interface.

slot slot-number: Specifies the slot number of the device, which is fixed at 1.

Usage guidelines

With the runt packet alarm function enabled, when the number of incoming runt packets on an interface in normal state within the specified interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the number of incoming runt packets on an interface in the alarm state within the specified interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can configure the runt packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5, lower threshold to 4, and statistics collection and comparison interval to 6 seconds for runt packet alarms.

<Sysname> system-view

[Sysname] ifmonitor runt slot 1 high-threshold 5 low-threshold 4 interval 6

Related commands

port ifmonitor runt

snmp-agent trap enable ifmonitor

ifmonitor rx-pause

Use ifmonitor rx-pause to configure global received pause frame alarm parameters.

Use undo ifmonitor rx-pause to restore the default.

Syntax

ifmonitor rx-pause slot slot-number high-threshold high-value low-threshold low-value interval interval

undo ifmonitor rx-pause slot slot-number

Default

The upper threshold is 500, the lower threshold is 100, and the statistics collection and comparison interval is 10 seconds for received pause frame alarms.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for received pause frame alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for received pause frame alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for received pause frames, in the range of 1 to 65535 seconds.

slot slot-number: Specifies the slot number of the device, which is fixed at 1.

Usage guidelines

With the received pause frame alarm function enabled, when the number of received pause frames on an interface in normal state within the specified interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the number of received pause frames on an interface in the alarm state within the specified interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can configure the received pause frame alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

For this command to take effect, you must use the snmp-agent trap enable ifmonitor command to enable the received pause frame alarm function.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 30, lower threshold to 20, and statistics collection and comparison interval to 4 seconds for received pause frame alarms.

<Sysname> system-view

[Sysname] ifmonitor rx-pause slot 1 high-threshold 30 low-threshold 20 interval 4

Related commands

snmp-agent trap enable ifmonitor

ifmonitor tx-pause

Use ifmonitor tx-pause to configure global sent pause frame alarm parameters.

Use undo ifmonitor tx-pause to restore the default.

Syntax

ifmonitor tx-pause slot slot-number high-threshold high-value low-threshold low-value interval interval

undo ifmonitor tx-pause slot slot-number

Default

The upper threshold is 500, the lower threshold is 100, and the statistics collection and comparison interval is 10 seconds for sent pause frame alarms.

Views

System view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for sent pause frame alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for sent pause frame alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for sent pause frames, in the range of 1 to 65535 seconds.

slot slot-number: Specifies the slot number of the device, which is fixed at 1.

Usage guidelines

With the sent pause frame alarm function enabled, when the number of sent pause frames on an interface in normal state within the specified interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the number of sent pause frames on an interface in the alarm state within the specified interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can configure the sent pause frame alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

For this command to take effect, you must use the snmp-agent trap enable ifmonitor command to enable the sent pause frame alarm function.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 20, lower threshold to 10, and statistics collection and comparison interval to 5 seconds for sent pause frame alarms.

<Sysname> system-view

[Sysname] ifmonitor tx-pause slot 1 high-threshold 20 low-threshold 10 interval 5

Related commands

snmp-agent trap enable ifmonitor

interface

Use interface to enter interface view, create a subinterface and enter its view, or enter the view of an existing subinterface.

Syntax

interface interface-type { interface-number | interface-number.subnumber }

Views

System view

Predefined user roles

network-admin

Parameters

interface-type: Specifies an interface type.

interface-number: Specifies an interface number.

Examples

# Enter the view of HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1]

# Create Ethernet subinterface HundredGigE 1/0/1.1 and enter its view.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1.1

[Sysname-HundredGigE1/0/1.1]

jumboframe enable

Use jumboframe enable to allow jumbo frames within the specified length to pass through.

Use undo jumboframe enable to prevent jumbo frames from passing through.

Use undo jumboframe enable size to restore the default.

Syntax

jumboframe enable [ size ]

undo jumboframe enable [ size ]

Default

The device allows jumbo frames within 9216 bytes to pass through.

Views

Layer 2 Ethernet interface view

Layer 3 Ethernet interface view

Predefined user roles

network-admin

Parameters

size: Sets the maximum length (in bytes) of Ethernet frames that are allowed to pass through. The value range is 1536 to 9216.

Usage guidelines

If you execute this command multiple times, the most recent configuration takes effect.

Examples

# Allow jumbo frames to pass through HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] jumboframe enable

lbn-group

Use lbn-group to create an LBN group and enter its view.

Use undo lbn-group to delete an LBN group.

Syntax

lbn-group group-name

undo lbn-group group-name

Views

System view

Default

No LBN group exists.

Predefined user roles

network-admin

Parameters

group-name: Specifies an LBN group name, a string of 1 to 31 characters.

Usage guidelines

The LBN group feature assigns different incoming interfaces on the device to an LBN group and assigns indexes to these interfaces. The device distributes traffic across various interfaces based on their configured index values by using a specific algorithm. Traffic that arrives at different incoming interfaces is then forwarded through different outgoing interfaces, achieving traffic load sharing.

Examples

# Create an LBN group named test and enter its view.

<Sysname> system-view

[Sysname] lbn-group test

[Sysname-lbn-group-test]

link-delay

Use link-delay to set the physical state change suppression interval on an Ethernet interface.

Use undo link-delay to restore the default.

Syntax

link-delay { down | up } [ msec ] delay-time

undo link-delay { down | up }

Default

Physical state change suppression is disabled.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

down: Suppresses link-down events.

up: Suppresses link-up events.

msec: Enables the physical state change suppression interval to be accurate to milliseconds. If you do not specify this keyword, the suppression interval is accurate to seconds.

delay-time: Sets the physical state change suppression interval on the Ethernet interface. A value of 0 means that physical state changes are immediately reported to the CPU and are not suppressed.

· If you do not specify the msec keyword, the value range is 0 to 30 seconds.

· If you specify the msec keyword, the value range is 0 to 10000 milliseconds, and the value must be a multiple of 100.

Usage guidelines

You can configure this feature to suppress only link-down events, only link-up events, or both events. If an event of the specified type still exists when the suppression interval expires, the system reports the event.

When you configure this feature, follow these guidelines:

· To suppress link-down events, execute the link-delay down command.

· To suppress link-up events, execute the link-delay up command.

On an interface, you can configure different suppression intervals for link-up and link-down events. If you execute the link-delay command multiple times on an interface, the following rules apply:

· You can configure the suppression intervals for link-up and link-down events separately.

· If you configure the suppression interval multiple times for link-up or link-down events, the most recent configuration takes effect.

Do not execute this command on an interface that has spanning tree protocols enabled.

This command, the dampening command, and the port link-flap protect enable command are mutually exclusive on an Ethernet interface.

Examples

# Set the link-down event suppression interval to 8 seconds on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] link-delay down 8

# Set the link-up event suppression interval to 800 milliseconds on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] link-delay up msec 800

Related commands

dampening

port link-flap protect enable

link-flap protect enable

Use link-flap protect enable to enable link flapping protection globally.

Use undo link-flap protect enable to disable link flapping protection globally.

Syntax

link-flap protect enable [ batch [ interval interval | threshold threshold ] * ]

undo link-flap protect enable [ batch [ interval | threshold ] ]

Default

Link flapping protection is disabled globally.

Views

System view

Predefined user roles

network-admin

Parameters

batch: Enables link flapping protection both globally and on all interfaces, and sets the default link flapping detection interval and link flapping detection threshold. If you do not specify this keyword, this command enables link flapping protection only globally.

interval interval: Specifies the link flapping detection interval in seconds. The value range for this argument is 10 to 60. The default value for this argument is 10.

threshold threshold: Specifies the link flapping detection threshold in the range of 5 to 10. The default value for this argument is 5.

Usage guidelines

Link flapping on any interface changes network topology and increases the system overhead.

With link flapping protection enabled on an interface, when the interface goes down, the system enables link flapping detection on the interface. During the link flapping detection interval, if the number of detected flaps reaches or exceeds the link flapping detection threshold, the system shuts down the interface.

Link flapping protection takes effect only when it is enabled in both the system view and interface view.

Any of the following operations can enable link flapping protection:

· Execute the link-flap protect enable batch command in system view, and do not configure link flapping protection on interfaces.

· Execute the link-flap protect enable batch command in system view, and execute the port link-flap protect enable command in interface view.

· Execute the link-flap protect enable command in system view, and execute the port link-flap protect enable command in interface view.

The undo link-flap protect enable command works different depending on the keywords specified as follows:

· If the batch keyword is not specified, this command disables link flapping protection globally.

· If the batch keyword is specified but the interval or threshold keyword is not specified, this command restores the default for the interval and threshold keywords.

· If the interval or threshold keyword is specified, this command restores the default for the interval or threshold keyword.

If you execute the link-flap protect enable batch command on an interface with the link-delay or dampening command executed, the link-delay or dampening command preferentially takes effect.

Examples

# Enable link flapping protection on all interfaces.

<Sysname> system-view

[Sysname] link-flap protect enable

Related commands

port link-flap protect enable

loadbalance ecmp lbn-group enable

Use loadbalance ecmp lbn-group enable to enable the ECMP-mode LBN group feature.

Use undo loadbalance ecmp lbn-group enable to disable the ECMP-mode LBN group feature.

Syntax

loadbalance ecmp lbn-group enable

undo loadbalance ecmp lbn-group enable

Views

System view

Default

The ECMP-mode LBN group feature is disabled.

Predefined user roles

network-admin

Usage guidelines

This command takes effect only on a network configured with ECMP.

Example

# Enable the ECMP-mode LBN group feature.

<Sysname> system-view

[Sysname] loadbalance ecmp lbn-group enable

loopback

CAUTION:

After you enable loopback testing on an Ethernet interface, the interface does not forward data traffic.

‌

Use loopback to enable loopback testing on an Ethernet interface.

Use undo loopback to disable loopback testing on an Ethernet interface.

Syntax

loopback internal

undo loopback

Default

Loopback testing is disabled on an Ethernet interface.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

internal: Enables internal loopback testing on the Ethernet interface.

Usage guidelines

After you enable loopback testing on an Ethernet interface, the Ethernet interface switches to full duplex mode. After you disable loopback testing, the Ethernet interface restores to its duplex setting.

Examples

# Enable internal loopback testing on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] loopback internal

port fec mode

Use port fec mode to set the forward error correction (FEC) mode of an interface.

Use undo port fec mode to restore the default.

Syntax

port fec mode { auto | base-r | none | rs-fec }

undo port fec mode

Default

An interface automatically sets the FEC mode based on the speed of the module installed in it.

Views

100-GE interface view

200-GE interface view

400-GE interface view

Predefined user roles

network-admin

Parameters

auto: Configures an interface to automatically set the FEC mode based on the speed of the module installed in it.

base-r: Specifies the BASE-R FEC mode.

none: Performs no FEC.

rs-fec: Specifies the RS-FEC mode.

Usage guidelines

The FEC feature corrects packet errors to improve transmission quality. It attaches correction information to a packet at the sending end, and corrects error codes generated during transmission at the receiving end based on the correction information. You can set the FEC mode as needed.

Make sure you set the same FEC mode for both interfaces of a link.

Table 8 shows the FEC modes actually used by interfaces when the interfaces have different FEC modes configured and modules of different rates are installed in the interfaces. Among them, RS528 and RS544 are two encoding schemes of the RS-FEC mode, and two interfaces with different encoding schemes cannot communicate.

Table 8 FEC modes used by interfaces

Interface type	Inserted transceiver module type	FEC mode actually used by the interface
Interface type	Inserted transceiver module type	Set to auto	Set to base-r	Set to rs-fec	Set to none
100-GE	10-GE transceiver module	Does not perform FEC	Not configurable	Not configurable	Not configurable
	25-GE transceiver module	RS528	BASE-R	RS528	Does not perform FEC
	100-GE transceiver module	RS544	Not configurable	Not configurable	Does not perform FEC
400-GE	400-GE transceiver module	RS544	Not configurable	Not configurable	Not configurable
	200-GE transceiver module	RS544	Not configurable	Not configurable	Not configurable
	100-GE transceiver module	RS544	Not configurable	RS528	Does not perform FEC
200-GE	200-GE transceiver module	RS544	Not configurable	Not configurable	Not configurable
200-GE	100-GE transceiver module	RS528	Not configurable	Not configurable	Not configurable
200-GE breakout interface	N/A	RS544	Not configurable	Not configurable	Not configurable
100-GE breakout interface	N/A	RS528	Not configurable	Not configurable	Not configurable
50-GE breakout interface	N/A	RS544	Not configurable	Not configurable	Not configurable
25-GE breakout interface	N/A	RS544	Not configurable	Not configurable	Not configurable

‌

Examples

# Set the FEC mode of FourHundredGigE 1/0/50 to autonegotiation.

<Sysname> system-view

[Sysname] interface FourHundredGigE 1/0/50

[Sysname- FourHundredGigE1/0/50] port fec mode auto

# Set the FEC mode of HundredGigE 1/0/1 to autonegotiation.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] port fec mode auto

port ifmonitor crc-error

Use port ifmonitor crc-error to configure CRC error packet alarm parameters for an interface.

Use undo port ifmonitor crc-error to restore the default.

Syntax

port ifmonitor crc-error [ ratio ] high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo port ifmonitor crc-error

Default

An interface uses the global CRC error packet alarm parameters.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

ratio: Specifies the alarm thresholds in percentage. If you do not specify this keyword, you configure the alarm thresholds in absolute value.

high-threshold high-value: Specifies the upper threshold for CRC error packet alarms. If you specify the ratio keyword, the value range is 1 to 100. If you do not specify the ratio keyword, the value range is 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for CRC error packet alarms. If you specify the ratio keyword, the value range is 1 to 100. If you do not specify the ratio keyword, the value range is 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for CRC error packets, in the range of 1 to 65535 seconds.

Usage guidelines

You can configure the CRC error packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5000, lower threshold to 400, and statistics collection and comparison interval to 6 seconds for CRC error packet alarms on GigabitEthernet 1/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] port ifmonitor crc-error high-threshold 5000 low-threshold 400 interval 6

Related commands

ifmonitor crc-error

snmp-agent trap enable ifmonitor

port ifmonitor giant

Use port ifmonitor giant to configure giant packet alarm parameters for an interface.

Use undo port ifmonitor giant to restore the default.

Syntax

port ifmonitor giant high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo port ifmonitor giant

Default

An interface uses the global giant packet alarm parameters.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for giant packet alarms, in the range of 1 to 4294967295.

low-threshold low-value: Specifies the lower threshold for giant packet alarms, in the range of 1 to 4294967295.

interval interval: Specifies the statistics collection and comparison interval for giant packets, in the range of 1 to 65535 seconds.

Usage guidelines

You can configure the giant packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5, lower threshold to 4, and statistics collection and comparison interval to 6 seconds for giant packet alarms on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] port ifmonitor giant high-threshold 5 low-threshold 4 interval 6

Related commands

ifmonitor giant

snmp-agent trap enable ifmonitor

port ifmonitor input-error

Use port ifmonitor input-error to configure input error packet alarm parameters for an interface.

Use undo port ifmonitor input-error to restore the default.

Syntax

port ifmonitor input-error high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo port ifmonitor input-error

Default

An interface uses the global input error packet alarm parameters.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for input error packet alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for input error packet alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for input error packets, in the range of 1 to 65535 seconds.

Usage guidelines

You can configure the input error packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5000, lower threshold to 400, and statistics collection and comparison interval to 6 seconds for input error packet alarms on GigabitEthernet 1/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] port ifmonitor input-error high-threshold 5000 low-threshold 400 interval 6

Related commands

ifmonitor input-error

snmp-agent trap enable ifmonitor

port ifmonitor input-usage

Use port ifmonitor input-usage to configure input bandwidth usage alarm parameters.

Use undo port ifmonitor input-usage to restore the default.

Syntax

port ifmonitor input-usage high-threshold high-value low-threshold low-value

undo port ifmonitor input-usage

Default

An interface uses the global input bandwidth usage alarm parameters.

Views

Interface view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for input bandwidth usage alarms, in the range of 1 to 100.

low-threshold low-value: Specifies the lower threshold for input bandwidth usage alarms, in the range of 1 to 100.

Usage guidelines

You can use the flow-interval command to set the statistics polling interval.

You can configure the input bandwidth usage alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

For this command to take effect, you must use the snmp-agent trap enable ifmonitor command to enable the input bandwidth usage alarm function.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 80 and lower threshold to 60 for input bandwidth usage alarms on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] port ifmonitor input-usage high-threshold 80 low-threshold 60

Related commands

flow-interval

ifmonitor input-usage

snmp-agent trap enable ifmonitor

port ifmonitor output-error

Use port ifmonitor output-error to configure output error packet alarm parameters for an interface.

Use undo port ifmonitor output-error to restore the default.

Syntax

port ifmonitor output-error high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo port ifmonitor output-error

Default

An interface uses the global output error packet alarm parameters.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for output error packet alarms, in the range of 1 to 4294967295 packets.

low-threshold low-value: Specifies the lower threshold for output error packet alarms, in the range of 1 to 4294967295 packets.

interval interval: Specifies the statistics collection and comparison interval for output error packets, in the range of 1 to 65535 seconds.

Usage guidelines

You can configure the output error packet alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5000, lower threshold to 400, and statistics collection and comparison interval to 6 seconds for output error packet alarms on GigabitEthernet 1/0/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] port ifmonitor output-error high-threshold 5000 low-threshold 400 interval 6

Related commands

ifmonitor output-error

snmp-agent trap enable ifmonitor

port ifmonitor output-usage

Use port ifmonitor output-usage to configure output bandwidth usage alarm parameters.

Use undo port ifmonitor output-usage to restore the default.

Syntax

port ifmonitor output-usage high-threshold high-value low-threshold low-value

undo port ifmonitor output-usage

Default

An interface uses the global output bandwidth usage alarm parameters.

Views

Interface view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for output bandwidth usage alarms, in the range of 1 to 100.

low-threshold low-value: Specifies the lower threshold for output bandwidth usage alarms, in the range of 1 to 100.

Usage guidelines

You can use the flow-interval command to set the statistics polling interval.

You can configure the output bandwidth usage alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

For this command to take effect, you must use the snmp-agent trap enable ifmonitor command to enable the output bandwidth usage alarm function.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 9 and lower threshold to 7 for output bandwidth usage alarms on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] port ifmonitor output-usage high-threshold 9 low-threshold 7

Related commands

flow-interval

ifmonitor output-usage

snmp-agent trap enable ifmonitor

port ifmonitor runt

Use port ifmonitor runt to configure runt packet alarm parameters for an interface.

Use undo port ifmonitor runt to restore the default.

Syntax

port ifmonitor runt high-threshold high-value low-threshold low-value interval interval [ shutdown ]

undo port ifmonitor runt

Default

An interface uses the global runt packet alarm parameters.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for runt packet alarms, in the range of 1 to 4294967295.

low-threshold low-value: Specifies the lower threshold for runt packet alarms, in the range of 1 to 4294967295.

interval interval: Specifies the statistics collection and comparison interval for runt packets, in the range of 1 to 65535 seconds.

Usage guidelines

You can configure the output bandwidth usage alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 5, lower threshold to 4, and statistics collection and comparison interval to 6 seconds for runt packet alarms on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] port ifmonitor runt high-threshold 5 low-threshold 4 interval 6

Related commands

ifmonitor runt

snmp-agent trap enable ifmonitor

port ifmonitor rx-pause

Use port ifmonitor rx-pause to configure received pause frame alarm parameters for an interface.

Use undo port ifmonitor rx-pause to restore the default.

Syntax

port ifmonitor rx-pause high-threshold high-value low-threshold low-value interval interval

undo port ifmonitor rx-pause

Default

An interface uses the global received pause frame alarm parameters.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for received pause frame alarms, in the range of 1 to 4294967295.

low-threshold low-value: Specifies the lower threshold for received pause frame alarms, in the range of 1 to 4294967295.

interval interval: Specifies the statistics collection and comparison interval for received pause frame packets, in the range of 1 to 65535 seconds.

Usage guidelines

With the received pause frame alarm function enabled, when the number of received pause frame packets on an interface in normal state within the specified interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the number of received pause frame packets on an interface in the alarm state within the specified interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can configure the received pause frame alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

For this command to take effect, you must use the snmp-agent trap enable ifmonitor command to enable the received pause frame alarm function.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 90, lower threshold to 50, and statistics collection and comparison interval to 5 seconds for received pause frame alarms on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] port ifmonitor rx-pause high-threshold 90 low-threshold 50 interval 5

Related commands

ifmonitor rx-pause

snmp-agent trap enable ifmonitor

port ifmonitor tx-pause

Use port ifmonitor tx-pause to configure sent pause frame alarm parameters for an interface.

Use undo port ifmonitor tx-pause to restore the default.

Syntax

port ifmonitor tx-pause high-threshold high-value low-threshold low-value interval interval

undo port ifmonitor tx-pause

Default

An interface uses the global sent pause frame alarm parameters.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

high-threshold high-value: Specifies the upper threshold for sent pause frame alarms, in the range of 1 to 4294967295.

low-threshold low-value: Specifies the lower threshold for sent pause frame alarms, in the range of 1 to 4294967295.

interval interval: Specifies the statistics collection and comparison interval for sent pause frame packets, in the range of 1 to 65535 seconds.

Usage guidelines

With the sent pause frame alarm function enabled, when the number of sent pause frame packets on an interface in normal state within the specified interval exceeds the upper threshold, the interface generates an upper threshold exceeding alarm and enters the alarm state. When the number of sent pause frame packets on an interface in the alarm state within the specified interval drops below the lower threshold, the interface generates a recovery alarm and restores to the normal state.

You can configure the output bandwidth usage alarm parameters in system view and interface view.

· The configuration in system view takes effect on all interfaces. The configuration in interface view takes effect only on the current interface.

· For an interface, the configuration in interface view takes priority, and the configuration in system view is used only when no configuration is made in interface view.

For this command to take effect, you must use the snmp-agent trap enable ifmonitor command to enable the sent pause frame alarm function.

When you execute this command multiple times, the most recent configuration takes effect.

Examples

# Set the upper threshold to 50, lower threshold to 40, and statistics collection and comparison interval to 8 seconds for sent pause frame alarms on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] port ifmonitor tx-pause high-threshold 50 low-threshold 40 interval 8

Related commands

ifmonitor tx-pause

snmp-agent trap enable ifmonitor

port link-flap protect

Use port link-flap protect to configure link flapping protection on an interface.

Use undo port link-flap protect to restore the default.

Syntax

port link-flap protect { disable | enable [ interval interval | threshold threshold ] * }

undo port link-flap protect { disable | enable [ interval | threshold ] }

Default

Link flapping protection is not configured on an interface, and the global link flapping protection configuration applies on the interface.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

disable: Disables link flapping protection on the interface.

enable: Enables link flapping protection on the interface.

interval interval: Specifies the link flapping detection interval in seconds. The value range for this argument is 10 to 60. The default value for this argument is 10.

threshold threshold: Specifies the link flapping detection threshold in the range of 5 to 10. The default value for this argument is 5.

Usage guidelines

Link flapping protection takes effect only when it is enabled in both the system view and interface view.

Any of the following operations can enable link flapping protection:

· Execute the link-flap protect enable batch command in system view, and do not configure link flapping protection on interfaces.

· Execute the link-flap protect enable batch command in system view, and execute the port link-flap protect enable command in interface view.

· Execute the link-flap protect enable command in system view, and execute the port link-flap protect enable command in interface view.

If the interval or threshold keyword is not specified when you execute the port link-flap protect enable command, the command uses the default settings for the interval and threshold keywords.

The undo port link-flap protect command works different depending on the keywords specified as follows:

· If the disable or enable keyword is not specified, this command restores the default for the link flapping protection function on the interface.

· If the interval or threshold keyword is specified, this command restores the default for the interval or threshold keyword.

To bring up an interface that has been shut down by link flapping protection, execute the undo shutdown command.

This command, the dampening command, and the link-delay command are mutually exclusive on an Ethernet interface.

Examples

# Enable link flapping protection on an interface. Set the link flapping detection interval to 10 seconds, and set the link flapping detection threshold to 5.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE 1/0/1] port link-flap protect enable interval 10 threshold 5

Related commands

dampening

link-delay

link-flap protect enable

port link-mode

Use port link-mode to change the link mode of an Ethernet interface.

Use undo port link-mode to restore the default.

Syntax

port link-mode { bridge | route }

undo port link-mode

Default

An interface operates in Layer 2 mode.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

bridge: Specifies the Layer 2 mode.

route: Specifies the Layer 3 mode.

Usage guidelines

‌

CAUTION:

Changing the link mode of an Ethernet interface also restores all commands (except shutdown) on the Ethernet interface to their defaults in the new link mode.

‌

Ethernet interfaces can operate either as Layer 2 or Layer 3 Ethernet interfaces. You can use this command to set the link mode to bridge (Layer 2) or route (Layer 3) for these Ethernet interfaces.

Examples

# Configure HundredGigE 1/0/1 to operate in Layer 2 mode.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] port link-mode bridge

port training

Use port training to configure link compensation on an interface.

Use undo port training to restore the default.

Syntax

port training { disable | enable }

undo port training

Default

By, default, link compensation on an interface is disabled.

Views

100-GE interface view

200-GE interface view

400-GE interface view

Predefined user roles

network-admin

Parameters

disable: Disables link compensation.

enable: Enables link compensation.

Usage guidelines

Link compensation enables the sending and receiving ends to exchange pre-emphasis and equalization parameters through frames. This feature improves the performance of pre-emphasis and equalization.

You must enable or disable link compensation on both interfaces of a link.

Examples

# Enable link compensation on HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] port training enable

# Enable link compensation on TwoHundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface twohundredgige 1/0/1

[Sysname-TwoHundredGigE1/0/1] port training enable

# Enable link compensation on FourHundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface fourhundredgige 1/0/1

[Sysname-FourHundredGigE1/0/1] port training enable

port up-mode

Use port up-mode to forcibly bring up a fiber Ethernet port.

Use undo port up-mode to restore the default.

Syntax

port up-mode

undo port up-mode

Default

A fiber Ethernet port is not forcibly brought up. The physical state of a fiber port depends on the physical state of the fibers.

Views

Ethernet interface view

Predefined user roles

network-admin

Usage guidelines

This command forcibly brings up a fiber Ethernet port and enables the port to forward packets unidirectionally over a single link. In this way, transmission links are well utilized.

The shutdown and port up-mode commands are mutually exclusive.

Examples

# Forcibly bring up fiber port HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] port up-mode

reset ethernet statistics

Use reset ethernet statistics to clear the Ethernet module statistics.

Syntax

reset ethernet statistics [ slot slot-number ]

Views

User view

Predefined user roles

network-admin

Parameters

slot slot-number: Specifies the slot number of the device, which is fixed at 1.

Examples

# Clear the Ethernet module statistics for the specified slot.

<Sysname> reset ethernet statistics slot 1

Related commands

display ethernet statistics

reset link-state-change statistics interface

Use reset link-state-change statistics interface to clear link state change statistics of interfaces.

Syntax

reset link-state-change statistics interface [ interface-type [ interface-number ] ]

Default

Link state change statistics of an interface are not cleared.

Views

User view

Predefined user roles

network-admin

Parameters

interface-type: Specifies an interface type.

interface-number: Specifies an interface number.

Usage guidelines

If you do not specify an interface type, this command clears the link state change statistics for all up interfaces that have traffic counters.

If you specify an interface type but do not specify an interface number, this command clears the link state change statistics for all interfaces of the specified type.

Examples

# Clear the link state change statistics of HundredGigE 1/0/1.

<Sysname> reset link-state-change statistics interface hundredgige 1/0/1

Related commands

display link-state-change statistics interface

reset packet-drop interface

Use reset packet-drop interface to clear the dropped packet statistics for an interface.

Syntax

reset packet-drop interface [ interface-type [ interface-number ] ]

Views

User view

Predefined user roles

network-admin

Parameters

interface-type: Specify an interface type.

interface-number: Specify an interface number.

Usage guidelines

If you do not specify an interface type, this command clears dropped packet statistics for all interfaces on the device.

If you specify an interface type but do not specify an interface number, the command clears dropped packet statistics for all interfaces of the specified type.

Examples

# Clear dropped packet statistics for HundredGigE 1/0/1.

<Sysname> reset packet-drop interface hundredgige 1/0/1

# Clear dropped packet statistics for all interfaces.

<Sysname> reset packet-drop interface

Related commands

display packet-drop

shutdown all-interfaces

Use shutdown all-interfaces to shut down all main interfaces except management interfaces, IRF physical interfaces, and interfaces excluded from shutdown.

Use undo shutdown all-interfaces to bring up all main interfaces except management interfaces, IRF physical interfaces, and interfaces excluded from shutdown.

Syntax

shutdown all-interfaces exclude interface-list

undo shutdown all-interfaces exclude interface-list

Default

A physical interface is up.

Views

System view

Predefined user roles

network-admin

Parameters

exclude interface-list: Specifies interfaces to be excluded from shutdown. With this option specified, this command will shut down all main interfaces except the management Ethernet interfaces, IRF physical interfaces, and the specified interfaces excluded from shutdown. Shutdown interfaces are in ADM state. Specify the interface list in the format of interface-list = { interface-type interface-number1 [ to interface-type interface-number2 ] }&<1-8>. The interface-type interface-number argument specifies an interface by its type and number. The & <1- 8> argument indicates that you can specify the preceding parameter for up to 8 times. The value for the interface-number2 argument must be greater than the value for the interface-number1 argument. For the configuration to succeed, make sure the start interface and the end interface, which are before and after the to keyword respectively, are of the same type.

Usage guidelines

This command shuts down all interfaces except the management Ethernet interfaces, IRF physical interfaces, and interfaces excluded from shutdown on a device. For an interface that supports subinterfaces, only the main interface is shut down, and its subinterfaces will not be shut down by this command. In this case, if you execute the display this command on an interface that is shut down, the output shows that the shutdown command is automatically generated on the interface.

To bring up an interface shut down by using the shutdown all-interfaces command, you can execute the undo shutdown command in interface view or the undo shutdown all-interfaces command in system view.

Examples

# Shut down all main interfaces except management interfaces, IRF physical interfaces, and interfaces HundredGigE 1/0/1 through HundredGigE 1/0/4.

<Sysname> system-view

[Sysname] shutdown all-interfaces exclude hundredgige 1/0/1 to hundredgige 1/0/4

Related commands

shutdown

shutdown all-physical-interfaces

shutdown all-physical-interface

Use shutdown all-physical-interfaces to shut down all physical interfaces.

Use undo shutdown all-physical-interfaces to bring up all physical interfaces.

Syntax

shutdown all-physical-interfaces

undo shutdown all-physical-interfaces

Default

Physical interfaces are up.

Views

System view

Predefined user roles

network-admin

Usage guidelines

With the shutdown all-physical-interfaces command, you can shut down all physical interfaces except the management Ethernet interfaces on the device. Physical interfaces shut down by using this command are in ADM state.

To shut down all physical interfaces or the specified interface, execute the shutdown all-physical-interfaces command in system view or execute the shutdown command in interface view.

To bring up a shutdown interface, execute the undo shutdown all-physical-interfaces command in system view and execute the undo shutdown command in interface view.

Examples

# Shut down all physical interfaces.

<Sysname> system-view

[Sysname] shutdown all-physical-interfaces

Related commands

shutdown

snmp-agent trap enable ifmonitor

Use snmp-agent trap enable ifmonitor to enable interface alarm functions.

Use undo snmp-agent trap enable ifmonitor to disable interface alarm functions.

Syntax

Default

Interface alarm functions are enabled.

Views

System view

Predefined user roles

network-admin

Parameters

crc-error: Enables the CRC error packet alarm function for interfaces.

giant: Enables the giant packet alarm function for interfaces.

input-error: Enables the input error packet alarm function for interfaces.

input-usage: Enables the input bandwidth usage alarm function for interfaces.

output-error: Enables the output error packet alarm function for interfaces.

output-usage: Enables the output bandwidth usage alarm function for interfaces.

runt: Enables the runt packet alarm function for interfaces.

rx-pause: Enables the received pause frame alarm function for interfaces.

tx-pause: Enables the sent pause frame alarm function for interfaces.

Examples

# Enable the CRC error packet alarm function for interfaces.

<Sysname> system-view

[Sysname] snmp-agent trap enable ifmonitor crc-error

speed

Use speed to set the speed of an Ethernet interface.

Use undo speed to restore the default.

Syntax

speed { 10 | 100 | 1000 | 10000 | 25000 | 40000 | 100000 | 200000 | 400000 | auto }

undo speed

Default

The speed of an Ethernet interface is autonegotiated.

Views

Ethernet interface view

Predefined user roles

network-admin

Parameters

10: Sets the interface speed to 10 Mbps.

100: Sets the interface speed to 100 Mbps.

1000: Sets the interface speed to 1000 Mbps.

10000: Sets the interface speed to 10000 Mbps.

25000: Sets the interface speed to 25000 Mbps.

40000: Sets the interface speed to 40000 Mbps.

100000: Sets the interface speed to 100000 Mbps.

200000: Sets the interface speed to 200000 Mbps.

400000: Sets the interface speed to 400000 Mbps.

auto: Enables the interface to negotiate a speed with its peer.

Usage guidelines

For an Ethernet copper port, use the speed command to set its speed to match the speed of the peer interface. Support of copper ports for keywords of this command varies by copper port type. For more information, use the speed ? command in interface view. If the system does not prompt that operation failed when you configure a speed for a copper port, the copper port supports this speed. Otherwise, the copper port does not support this speed.

For a fiber port, use the speed command to set its speed to match the rate of a transceiver module. Support of fiber ports for keywords of this command varies by fiber port type. For more information, use the speed ? command in interface view. If the system does not prompt that operation failed when you configure a speed for a fiber port, the fiber port supports this speed. Otherwise, the fiber port does not support this speed.

Additionally, you must select a speed for a fiber port according to the transceiver module installed to ensure that the transceiver module can be used properly. If the transceiver module installed in a fiber port does not support the speed for the fiber port, the transceiver module cannot be used.

Examples

# Configure HundredGigE 1/0/1 to autonegotiate the speed.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] speed auto

traffic-statistic include-interframe

Use traffic-statistic include-interframe to enable interframe gap and preamble statistics in the traffic statistics.

Use traffic-statistic include-interframe to restore the default.

Syntax

traffic-statistic include-interframe

undo traffic-statistic include-interframe

Default

The interframe gap and preamble statistics are disabled in the traffic statistics.

Views

Ethernet interface view

Predefined user roles

network-admin

Usage guidelines

If you execute the display interface command, the Last 300 seconds input rate or Last 300 seconds output rate field in the command output displays the average outbound or inbound traffic rate in the last 300 seconds.

By default, traffic rate = native frame length × packet count per second. Execute the traffic-statistic include-interframe command if you need the total traffic statistics, including the native frame length, interframe gap length, and preamble length, for a specific time period. With this command executed, traffic rate = (native frame length + interframe gap length + preamble length) × packet throughput per second.

By default, the interframe gap length and preamble length are fixed. However, you can execute the itf number command to adjust the interframe gap length. Adjusting the interframe gap length causes inaccuracy in only the traffic statistics being collected.

Examples

# Enable interframe gap and preamble statistics in the traffic statistics for HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] traffic-statistic include-interframe

Set traffic statistic to include Inter-frame Gaps and Preambles, and clear the statistics count. Continue? [Y/N] :y

Related commands

display interface

itf number

using fiftygige

Use using fiftygige to split a 200-GE interface into four 50-GE breakout interfaces.

Syntax

using fiftygige

undo using fiftygige

Default

A 200-GE interface is not split into 50-GE breakout interfaces.

Views

200-GE interface view

Predefined user roles

network-admin

Usage guidelines

This command is not supported on non-default MDCs.

To improve port density, reduce costs, and improve network flexibility, you can split a 200-GE interface into four 50-GE breakout interfaces. For example, you can split 200-GE interface TwoHundredGigE 1/0/1 into four 50-GE breakout interfaces FiftyGigE 1/0/1:1 through FiftyGigE 1/0/1:4.

After you execute this command, you can use the display interface brief command to view the breakout interfaces without restarting the device.

Examples

# Split TwoHundredGig 1/0/1 into four 50-GE breakout interfaces.

<Sysname> system-view

[Sysname] interface twohundredgige 1/0/1

[Sysname- twoHundredGig 1/0/1] using fifty

The interface twoHundredGig 1/0/1 will be deleted. Continue? [Y/N]:y

using fourhundredgige

Use using fourhundredgige to combine breakout interfaces split from a 400-GE interface into a 400-GE interface.

IMPORTANT:

Type IMPORTANT text here. Only the S9825 switch series supports splitting a 400-GE interface into four 100-GE breakout interfaces.

Syntax

using fourhundredgige

Default

The breakout interfaces are not combined and operate as single interfaces.

Views

50-GE breakout interface view

100-GE breakout interface view

200-GE breakout interface view

Predefined user roles

network-admin

Usage guidelines

If you need higher bandwidth on a single interface, you can perform one of the following tasks:

· Combine 100-GE breakout interfaces split from a 400-GE interface into a 400-GE interface. To do so, execute this command on any of these 100-GE breakout interfaces.

· Combine 200-GE breakout interfaces split from a 400-GE interface into a 400-GE interface. To do so, execute this command on any of these 200-GE breakout interfaces.

· Combine 50-GE breakout interfaces split from a 400-GE interface into a 400-GE interface. To do so, execute this command on any of these 200-GE breakout interfaces.

After executing this command, you do not need to reboot the device. To view the breakout interfaces, execute the display interface brief command.

Examples

# Combine HundredGigE 1/0/1:1 through HundredGigE 1/0/1:4 into a 400-GE interface.

<System> system-view

[System] interface hundredgige1/0/1:1

[System-HundredGigE 1/0/1:1] using fourhundredgige

The interfaces HundredGigE1/0/1:1 HundredGigE1/0/1:2 HundredGigE1/0/1:3 and HundredGigE1/0/1:4 will be deleted. Continue? [Y/N]:y

# Combine TwoHundredGigE 1/0/1:1 and TwoHundredGigE 1/0/1:2 into a 400-GE interface.

<Sysname> system-view

[Sysname] interface twohundredgige 1/0/1:1

[Sysname-TwoHundredGigE1/0/1:1] using fourhundredgige

The interfaces TwoHundredGigE1/0/1:1 and TwoHundredGigE1/0/1:2 will be deleted. Continue? [Y/N]:y

Related commands

using hundredgige

using twohundredgige

using hundredgige

Use using hundredgige to split a 200-GE interface into multiple 100-GE interfaces or split a 400-GE interface into multiple 100-GE interfaces.

NOTE:

· Only a 400-GE interface on the S9825 switch series can be split into four 100-GE breakout interfaces.

· Only a 200-GE interface on the S9855-24B8D switch series can be split into two 100-GE breakout interfaces.

‌

Syntax

using hundredgige

Default

The 200-GE interface is used as a single interface, and is not split. The 400-GE interface is used as a single interface, and is not split.

Views

200-GE interface view

400-GE interface view

Predefined user roles

network-admin

Usage guidelines

To improve port density, reduce costs, and improve network flexibility, you can also split a 400-GE interface or a 200-GE interface into multiple 100-GE breakout interfaces. For example, you can split 400-GE interface FourHundredGigE 1/0/1 into four 100-GE breakout interfaces HundredGigE 1/0/1:1 through HundredGigE 1/0/1:4. The 100-GE breakout interfaces are numbered differently than common 100-GE interfaces and cannot be split. You cannot use the speed command to change the speed for the 100-GE breakout interfaces.

After executing this command, you do not need to reboot the device. To view the breakout interfaces, execute the display interface brief command.

Examples

# Split TwoHundredGigE 1/0/1 into multiple 100-GE interfaces.

<Sysname> system-view

[Sysname] interface twohundredgige 1/0/1

[Sysname-TwoHundredGigE1/0/1] using hundredgige

The interface TwoHundredGigE1/0/1 will be deleted. Continue? [Y/N]:y

Reboot device to make the configuration take effect.

# Split FourHundredGigE 1/0/1 into multiple 100-GE interfaces.

<Sysname> system-view

[Sysname] interface fourhundredgige 1/0/1

[Sysname-FourHundredGigE1/0/1] using hundredgige

The interface FourHundredGigE1/0/1 will be deleted. Continue? [Y/N]:y

Related commands

using fourhundredgige

using tengige

Use using tengige to split a high bandwidth interface into multiple 10-GE breakout interfaces.

Use undo using tengige to cancel the configuration.

Syntax

using tengige

undo using tengige

Default

A high bandwidth interface is not split and operates as a single interface.

Views

200-GE interface view

Predefined user roles

network-admin

Usage guidelines

To improve port density, reduce costs, and improve network flexibility, you can split a 200-GE interface into four 10-GE breakout interfacesFor example:

· Split a 200-GE interface TwoHundredGigE 1/0/1 into four 10-GE breakout interfaces Ten-GigabitEthernet 1/0/1:1 through Ten-GigabitEthernet 1/0/1:4.

The 10-GE breakout interfaces are numbered in a different way than common 10-GE physical interfaces and do not support the speed command.

After you execute this command, you do not need to reboot the device or interface card. To view the breakout interfaces, execute the display interface brief command.

Examples

# Split TwoHundredGigE 1/0/1 into four 10-GE breakout interfaces.

<Sysname> system-view

[Sysname] interface twohundredgige 1/0/1

[Sysname-TwoHundredGigE1/0/1] using tengige

The interface TwoHundredGigE1/0/1 will be deleted. Continue? [Y/N]:y

Related commands

using twohundredgige

using twenty-fivegige

Use using twenty-fivegige to split a 200-GE interface into four 25-GE breakout interfaces.

Use undo using twenty-fivegige to cancel the configuration.

Syntax

using twenty-fivegige

undo using twenty-fivegige

Default

A 200-GE interface is not split and operates as a single interface.

Views

200-GE interface view

Predefined user roles

network-admin

Usage guidelines

To improve port density, reduce costs, and improve network flexibility, you can split a high-speed GE interface into multiple 25-GE breakout interfaces. For example, you can split the 200-GE interface TwoHundredGigE 1/0/1 into four 25-GE breakout interfaces Twenty-FiveGigE 1/0/1:1 through Twenty-FiveGigE 1/0/1:4.

For this command to take effect, you do not need to reboot the device after executing this command. To view the split or combined interfaces, execute the display interface brief command.

Examples

# Split TwoHundredGigE 1/0/1 into four 25-GE breakout interfaces.

<Sysname> system-view

[Sysname] interface twohundredgige 1/0/1

[Sysname-TwoHundredGigE1/0/1] using twenty-fivegige

The interface TwoHundredGigE1/0/1 will be deleted. Continue? [Y/N]:y

Related commands

using twenty-fivegive

using twohundredgige

Use using twohundredgige to combine breakout interfaces split from a 200-GE interface into a 200-GE interface or split a 400-GE interface into two 200-GE breakout interfaces.

‌

NOTE:

You can combine breakout interfaces split from a 200-GE interface into a 200-GE interface only on the S9855-24B8D Switch Series.

‌

Syntax

using twohundredgige

Default

A breakout interface is not split and operates as a single interface. A 400-GE interface is not split and operates as a single interface.

Views

400-GE interface view

25-GE breakout interface view

50-GE interface view

Predefined user roles

network-admin

Usage guidelines

If you need higher bandwidth on a single interface, you can combine multiple 25GE/50GE breakout interfaces split from a 200-GE interface into a 200-GE interface. To do so, execute this command on any of these 25GE/50GE breakout interfaces.

To improve port density, reduce costs, and improve network flexibility, you can split a 400-GE interface into two 200-GE breakout interfaces. For example, you can split the 400-GE interface FourHundredGigE 1/0/1 into two 200-GE breakout interfaces TwoHundredGigE 1/0/1:1 and TwoHundredGigE 1/0/1:2.

The 200-GE breakout interfaces are numbered differently than common 200-GE interfaces, and you cannot use the speed command to change the speed for the 200-GE breakout interfaces.

After executing this command, you do not need to reboot the device. To view the breakout interfaces, execute the display interface brief command.

Examples

# Split FourHundredGigE 1/0/1 into two 200-GE breakout interfaces.

<System> system-view

[System] interface fourhundredgige 1/0/1

[System-FourHundredGigE1/0/1] using twohundredgige

The interface FourHundredGigE1/0/1 will be deleted. Continue? [Y/N]:y

Related commands

using fourhundredgige

Layer 2 Ethernet interface commands

display storm-constrain

Use display storm-constrain to display storm control settings and statistics.

Syntax

display storm-constrain [ broadcast | known-unicast | multicast | unicast ] [ interface interface-type interface-number ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

broadcast: Displays broadcast storm control settings and statistics.

unicast: Displays known unicast storm control settings and statistics.

multicast: Displays multicast storm control settings and statistics.

unicast: Displays unknown unicast storm control settings and statistics.

interface interface-type interface-number: Specifies an interface by its type and number. If you do not specify this option, the command displays storm control settings and statistics for all storm control-enabled interfaces.

Usage guidelines

If you do not specify any keywords, this command displays all storm control settings on all storm control-enabled interfaces.

Examples

# Display the storm control settings on all storm control-enabled ports.

<Sysname> display storm-constrain

Abbreviation: BC - broadcast; MC - multicast; UC - unknown unicast;

KNUC - known unicast; FW - forwarding

Flow Statistic Interval: 5 (in seconds)

Port Type Lower Upper Unit CtrlMode Status Trap Log StateChanges

--------------------------------------------------------------------------------

HGE1/0/1 MC 100 200 kbps shutdown shutdown off on 10

Table 9 Command output

Field	Description
Flow Statistic Interval	Traffic polling interval (in seconds) of the storm control module.
Port	Abbreviated interface name.
Type	Type of traffic subjected to storm control: · BC—Broadcast packets. · MC—Multicast packets. · UC—Unknown unicast packets. · KUNC—Known unicast packets.
Lower	Lower storm control threshold, in pps, kbps, or percentage.
Upper	Upper storm control threshold, in pps, kbps, or percentage.
Unit	Storm control threshold unit: · pps. · kbps. · percentage.
CtrlMode	Action (block or shutdown) taken on the interface when the upper threshold is reached. N/A indicates that no action is configured.
Status	Packet forwarding status: · FW—The port is forwarding traffic correctly. · shutdown—The port has been shut down. · block—The port drops the type of traffic.
Trap	Status of the storm control threshold event trap switch: · on—The port sends threshold event traps. · off—The port does not send threshold event traps.
Log	Status of the storm control threshold event log switch: · on—The port sends threshold event log messages. · off—The port does not send threshold event log messages.
SwitchNum	Number of forwarding state changes of the interface. When the SwitchNum field reaches 65535, it resets automatically.

‌

storm-constrain

Use storm-constrain to enable storm control and set thresholds for broadcast, multicast, or unknown unicast packets on an Ethernet interface.

Use undo storm-constrain to disable storm control for broadcast, multicast, unknown unicast, or all types of traffic.

Syntax

storm-constrain { broadcast | multicast | unicast } { pps | kbps | ratio } upperlimit lowerlimit

undo storm-constrain { all | broadcast | multicast | unicast }

Default

Traffic storm control is disabled.

Views

Layer 2 Ethernet interface view

Predefined user roles

network-admin

Parameters

all: Disables storm control for all types of traffic: unknown unicast, multicast, and broadcast.

broadcast: Enables or disables broadcast storm control.

multicast: Enables or disables multicast storm control.

unicast: Enables or disables unknown unicast storm control.

pps: Sets storm control thresholds in pps.

kbps: Sets storm control thresholds in kbps.

ratio: Sets storm control thresholds as a percentage of the transmission capacity of the interface.

upperlimit: Sets the upper threshold, in pps, kbps, or percentage.

· If you specify the pps keyword, the value range for the upperlimit argument is 1 to 1.4881 × the interface bandwidth.

· If you specify the kbps keyword, the value range for the upperlimit argument is 1 to the interface bandwidth.

· If you specify the ratio keyword, the value range for the upperlimit argument is 1 to 100.

lowerlimit: Sets the lower threshold, in pps, kbps, or percentage.

· If you specify the pps keyword, the value range for the lowerlimit argument is 1 to 1.4881 × the interface bandwidth.

· If you specify the kbps keyword, the value range for the lowerlimit argument is 1 to the interface bandwidth.

· If you specify the ratio keyword, the value range for the lowerlimit argument is 1 to 100.

Usage guidelines

After you configure storm control for a type of traffic, the device collects the statistics for the type of traffic at the interval configured by using the storm-constrain interval command. When the type of traffic exceeds its upper threshold, the interface takes an action configured by using the storm-constrain control command.

In a DRNI network, you cannot use the storm-constrain. command to enable storm control and set thresholds for unknown unicast packets.

When configuring this command, make sure upperlimit is greater than lowerlimit.

Examples

# Enable unknown unicast storm control on HundredGigE 1/0/1 and set the upper and lower thresholds to 200 pps and 150 pps, respectively.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] storm-constrain unicast pps 200 150

# Enable broadcast storm control on HundredGigE 1/0/2, and set the upper and lower thresholds to 2000 kbps and 1500 kbps, respectively.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/2

[Sysname-HundredGigE1/0/2] storm-constrain broadcast kbps 2000 1500

# Enable multicast storm control on HundredGigE 1/0/3, and set the upper and lower thresholds to 80% and 15%, respectively.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/3

[Sysname-HundredGigE1/0/3] storm-constrain multicast ratio 80 15

Related commands

storm-constrain control

storm-constrain interval

storm-constrain control

Use storm-constrain control to set the action to take on an Ethernet interface when a type of traffic (unknown unicast, multicast, or broadcast) exceeds the upper storm control threshold.

Use undo storm-constrain control to restore the default.

Syntax

storm-constrain control { block | shutdown }

undo storm-constrain control

Default

No action is taken on an Ethernet interface when a type of traffic exceeds the upper storm control threshold.

Views

Layer 2 Ethernet interface view

Predefined user roles

network-admin

Parameters

block: Blocks this type of traffic and forwards other types of traffic. Even though the interface does not forward the blocked traffic, it still counts the traffic. When the blocked traffic drops below the lower threshold, the port begins to forward the traffic.

shutdown: Goes down automatically. The interface goes down automatically and stops forwarding any traffic. When the blocked traffic drops below the lower threshold, the interface does not forward the traffic. To bring up the interface, use the undo shutdown command or disable storm control on the interface.

Examples

# Configure HundredGigE 1/0/1 to block a specific type of traffic when the type of traffic exceeds the upper storm control threshold.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] storm-constrain control block

Related commands

storm-constrain

storm-constrain control

storm-constrain enable log

Use storm-constrain enable log to enable an Ethernet interface to output log messages when it detects storm control threshold events.

Use undo storm-constrain enable log to disable an Ethernet interface from outputting log messages for storm control threshold events.

Syntax

storm-constrain enable log

undo storm-constrain enable log

Default

An Ethernet interface outputs log messages when monitored traffic exceeds the upper threshold or drops below the lower threshold from a value above the upper threshold.

Views

Layer 2 Ethernet interface view

Predefined user roles

network-admin

Examples

# Enable HundredGigE 1/0/1 to output log messages when it detects storm control threshold events.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] storm-constrain enable log

storm-constrain enable trap

Use storm-constrain enable trap to enable an Ethernet interface to send storm control threshold event traps.

Use undo storm-constrain enable trap to disable an Ethernet interface from sending storm control threshold event traps.

Syntax

storm-constrain enable trap

undo storm-constrain enable trap

Default

An interface sends out storm control threshold event traps when monitored traffic exceeds the upper threshold or drops below the lower threshold from a value above the upper threshold.

Views

Layer 2 Ethernet interface view

Predefined user roles

network-admin

Examples

# Enable HundredGigE 1/0/1 to send traps when it detects storm control threshold events.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] storm-constrain enable trap

storm-constrain interval

Use storm-constrain interval to set the traffic polling interval of the storm control module.

Use undo storm-constrain interval to restore the default.

Syntax

storm-constrain interval interval

undo storm-constrain interval

Default

The storm control module polls traffic statistics every 10 seconds.

Views

System view

Predefined user roles

network-admin

Parameters

interval: Sets the traffic polling interval of the storm control module. The value range is 1 to 300 seconds. To ensure network stability, as a best practice, do not use a traffic polling interval shorter than 10 seconds.

Usage guidelines

The traffic polling interval set by using the storm-constrain interval command is specific to storm control. To set the statistics polling interval of an interface, use the flow-interval command.

Examples

# Set the traffic statistics polling interval of the storm control module to 60 seconds.

<Sysname> system-view

[Sysname] storm-constrain interval 60

Related commands

storm-constrain

storm-constrain control

Layer 3 Ethernet interface or subinterface commands

mac-address

Use mac-address to set the MAC address of an Ethernet interface.

Use undo mac-address to restore the default.

Syntax

mac-address mac-address

undo mac-address

Default

No MAC address is configured for an Ethernet interface.

Views

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Predefined user roles

network-admin

Parameters

mac-address: Specifies a MAC address in the format of H-H-H.

Usage guidelines

Examples

# Set the MAC address of HundredGigE 1/0/1 to 0001-0001-0001.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] mac-address 1-1-1

mtu

Use mtu to set the MTU for an Ethernet interface or subinterface.

Use undo mtu to restore the default.

Syntax

mtu size

undo mtu

Default

The MTU of an Ethernet interface or subinterface is 1500 bytes.

Views

Layer 3 Ethernet interface view

Layer 3 Ethernet subinterface view

Predefined user roles

network-admin

Parameters

size: Sets the MTU in bytes. The value range for this argument is 46 to 9198.

Usage guidelines

The configured MTU takes effect only on the packets forwarded by the CPU. To avoid unnecessary fragmentation, set a proper MTU value.

If an interface supports both the mtu and ip mtu commands, the device fragments an IPv4 packet based on the MTU set by using the ip mtu command. For more information about the ip mtu command, see Layer 3—IP Services Command Reference.

Examples

# Set the MTU to 1430 bytes for HundredGigE 1/0/1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1

[Sysname-HundredGigE1/0/1] mtu 1430

# Set the MTU to 1430 bytes for HundredGigE 1/0/1.1.

<Sysname> system-view

[Sysname] interface hundredgige 1/0/1.1

[Sysname-HundredGigE1/0/1.1] mtu 1430

04-Interface Command Reference

flow-control receive enable

reset ethernet statistics

display storm-constrain

storm-constrain

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