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| Title | Size | Download |
|---|---|---|
| 03-Ethernet interface commands | 226.93 KB |
Contents
Common Ethernet interface commands
display link-state-change statistics interface
reset link-state-change statistics interface
snmp-agent trap enable ifmonitor
Layer 3 Ethernet interface commands
Ethernet interface commands
Common Ethernet interface commands
broadcast-suppression
Use broadcast-suppression to enable broadcast suppression and set the broadcast suppression threshold.
Use undo broadcast-suppression to disable broadcast suppression.
Syntax
broadcast-suppression { ratio | pps max-pps | kbps max-kbps }
undo broadcast-suppression
Default
Ethernet interfaces do not suppress broadcast traffic.
Views
Ethernet interface view
Predefined user roles
network-admin
Parameters
ratio: Sets the broadcast suppression threshold as a percentage of the interface bandwidth. The value range for this argument is 0 to 100. A smaller value means that less broadcast traffic is allowed to pass through.
pps max-pps: Specifies the maximum number of broadcast packets that the interface can forward per second. The value range for the max-pps argument (in pps) is 0 to 1.4881 × the interface bandwidth.
kbps max-kbps: Specifies the maximum number of kilobits of broadcast traffic that the Ethernet interface can forward per second. The value range for this argument (in kbps) is 0 to the interface bandwidth.
Usage guidelines
The broadcast storm suppression features limits the size of broadcast traffic to a threshold on an interface. When the broadcast traffic on the interface exceeds this threshold, the system drops packets until the traffic drops below this threshold.
Examples
# Set the broadcast suppression threshold to 10000 kbps on Twenty-FiveGigE 1/0/1.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] broadcast-suppression kbps 10000
Related commands
multicast-suppression
unicast-suppression
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. · 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 ] ] [ 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.
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 Twenty-FiveGigE 1/0/1.
<Sysname> display interface twenty-fivegige 1/0/1
Twenty-FiveGigE1/0/1
Current state: DOWN
Line protocol state: DOWN
Description: Twenty-FiveGigE1/0/1 Interface
Bandwidth: 100000000 kbps
Maximum transmission unit: 1500
Allow jumbo frames to pass
Broadcast max-ratio: 100%
Unknown-multicast max-ratio: 100%
Unicast max-ratio: 100%
Internet protocol processing: Disabled
IP packet frame type: Ethernet II, hardware address: 1234-5612-347f
IPv6 packet frame type: Ethernet II, hardware address: 1234-5612-347f
Media type is not sure, Port hardware type is no connector
Port priority: 0
Last link flapping: Never
Last clearing of counters: Never
Current system time:2021-01-01 07:49:03
Last time when physical state changed to up:-
Last time when physical state changed to down:2021-01-01 07:49:00
Peak input rate: 0 bytes/sec, at 00-00-00 00:00:00
Peak output rate: 0 bytes/sec, at 00-00-00 00:00:00
Last 300 seconds input: 0 packets/sec 0 bytes/sec -%
Last 300 seconds output: 0 packets/sec 0 bytes/sec -%
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 Twenty-FiveGigE 1/0/1.
<Sysname> display interface twenty-fivegige 1/0/1
Twenty-FiveGigE1/0/1
Current state: DOWN
Line protocol state: DOWN
IP packet frame type: Ethernet II, hardware address: 000c-2963-b767
Description: Twenty-FiveGigE1/0/1 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: 10304
Allow jumbo frames to pass
Broadcast max-ratio: 100%
Unknown-multicast max-ratio: 100%
Unicast max-ratio: 100%
PVID: 1
Port link-type: Access
Tagged VLANs: None
Untagged VLANs: 1
Port priority: 0
Last link flapping: Never
Last clearing of counters: Never
Current system time:2021-01-01 07:50:51
Last time when physical state changed to up:-
Last time when physical state changed to down:2021-01-01 07:50:49
Peak input rate: 0 bytes/sec, at 00-00-00 00:00:00
Peak output rate: 0 bytes/sec, at 00-00-00 00:00:00
Last 300 seconds input: 0 packets/sec 0 bytes/sec -%
Last 300 seconds output: 0 packets/sec 0 bytes/sec -%
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. · STP DOWN—The interface has been shut down by the BPDU guard feature. · 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. |
|
10Mbps-speed mode |
The interface is operating at 10 Mbps. This field depends on your configuration and the link parameter negotiation result. |
|
100Mbps-speed mode |
The interface is operating at 100 Mbps. This field depends on your configuration and the link parameter negotiation result. |
|
1000Mbps-speed mode |
The interface is operating at 1000 Mbps. This field depends on your configuration and the link parameter negotiation result. |
|
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. |
|
Unknown-speed mode |
The speed of the interface is unknown because the speed negotiation fails or the interface is physically disconnected. |
|
half-duplex mode |
The interface is operating in half duplex mode. This field depends on your configuration and the link parameter negotiation result. |
|
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. |
|
Broadcast max- |
Broadcast storm suppression threshold in ratio, pps, or kbps. The unit of the threshold depends on your configuration. |
|
Unknown-multicast max- |
Multicast storm suppression threshold in ratio, pps, or kbps. The unit of the threshold depends on your configuration. |
|
Unicast max- |
Unknown unicast storm suppression threshold in ratio, pps, or kbps. The unit of the threshold depends on your configuration. |
|
PVID |
Port VLAN ID (PVID) of the interface. |
|
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. · 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. |
|
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
WGE1/0/1 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
WGE1/0/2 DOWN auto A A 1
WGE1/0/3 UP auto F(a) A 1 aaaaaaaaaaaaaaaaaaaa
# Display brief information about Twenty-FiveGigE 1/0/3, including the complete description of the interface.
<Sysname> display interface twenty-fivegige 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
WGE1/0/3 UP auto F(a) A 1 aaaaaaaaaaaaaaaaaaaaa
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
WGE1/0/1 DOWN Not connected
Vlan2 DOWN Not connected
Brief information on interfaces in bridge mode:
Link: ADM - administratively down; Stby - standby
Interface Link Cause
WGE1/0/2 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). · STP DOWN—The interface has been shut down by the BPDU guard feature. |
reset counters interface
display link-flap protection
Use display link-flap protection to display information about link flapping protection on an interface.
display link-flap protection [ interface interface-type [ interface-number ] ]
Views
Any view
Predefined user roles
network-admin
network-operator
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
WGE1/0/1 Enabled Down 10 5
WGE1/0/2 Disabled N/A -- --
|
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. |
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
WGE1/0/1 0 Never Never
Never Never
Table 5 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
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 Twenty-FiveGigE 1/0/1 to operate in full duplex mode.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] duplex full
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 Twenty-FiveGigE 1/0/1.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] flow-interval 100
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 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
interface
Use interface to enter interface view.
Syntax
interface interface-type interface-number
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 Twenty-FiveGigE 1/0/1.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1]
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 10304 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 for this argument is 1536 to 10304.
Usage guidelines
If you execute this command multiple times, the most recent configuration takes effect.
Examples
# Allow jumbo frames to pass through Twenty-FiveGigE 1/0/1.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] jumboframe enable
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 or Smart Link enabled.
This 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 Twenty-FiveGigE 1/0/1.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] link-delay down 8
# Set the link-up event suppression interval to 800 milliseconds on Twenty-FiveGigE 1/0/1.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] link-delay up msec 800
Related commands
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. For example, in an active/standby link scenario, when the interface status on the active link changes between UP and DOWN, traffic switches between active and standby links. To solve this problem, execute this command.
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 command executed, the link-delay 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
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
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 Twenty-FiveGigE 1/0/1.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] loopback internal
multicast-suppression
Use multicast-suppression to enable multicast storm suppression and set the multicast storm suppression threshold.
Use undo multicast-suppression to disable multicast storm suppression.
Syntax
multicast-suppression { ratio | pps max-pps | kbps max-kbps }
undo multicast-suppression
Default
Ethernet interfaces do not suppress multicast traffic.
Views
Ethernet interface view
Predefined user roles
network-admin
Parameters
ratio: Sets the multicast suppression threshold as a percentage of the interface bandwidth. The value range for this argument (in percentage) is 0 to 100. A smaller value means that less multicast traffic is allowed to pass through.
pps max-pps: Specifies the maximum number of multicast packets that the interface can forward per second. The value range for the max-pps argument (in pps) is 0 to 1.4881 × the interface bandwidth.
kbps max-kbps: Specifies the maximum number of kilobits of multicast traffic that the Ethernet interface can forward per second. The value range for this argument (in kbps) is 0 to the interface bandwidth.
Usage guidelines
The multicast storm suppression feature limits the size of multicast traffic to a threshold on an interface. When the multicast traffic on the interface exceeds this threshold, the system drops packets until the traffic drops below this threshold.
Examples
# Set the multicast storm suppression threshold to 10000 kbps on Twenty-FiveGigE 1/0/1.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] multicast-suppression kbps 10000
Related commands
broadcast-suppression
unicast-suppression
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
The FEC mode of an interface is autonegotiated.
Views
25-GE interface view
100-GE interface view
200-GE interface view
400-GE interface view
Predefined user roles
network-admin
Parameters
auto: Specifies the FEC autonegotiation mode.
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.
Examples
# Set the FEC mode of Twenty-FiveGigE 1/0/1 to autonegotiation.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] 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.
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.
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 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 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.
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.
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 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 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.
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.
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.
To bring up an interface that has been shut down by link flapping protection, execute the undo shutdown command.
This 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 twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE 1/0/1] port link-flap protect enable interval 10 threshold 5
Related commands
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 description, duplex, jumboframe enable, speed, and 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 Twenty-FiveGigE 1/0/1 to operate in Layer 2 mode.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] port link-mode bridge
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 Twenty-FiveGigE 1/0/1.
<Sysname> reset link-state-change statistics interface twenty-fivegige 1/0/1
Related commands
display link-state-change statistics interface
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
snmp-agent trap enable ifmonitor [ crc-error | input-error ] *
undo snmp-agent trap enable ifmonitor [ crc-error | input-error ] *
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.
input-error: Enables the input error packet 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 | 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.
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 Twenty-FiveGigE 1/0/1 to autonegotiate the speed.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] speed auto
unicast-suppression
Use unicast-suppression to enable unknown unicast storm suppression and set the unknown unicast storm suppression threshold.
Use undo unicast-suppression to disable unknown unicast storm suppression.
Syntax
unicast-suppression { ratio | pps max-pps | kbps max-kbps }
undo unicast-suppression
Default
Ethernet interfaces do not suppress unknown unicast traffic.
Views
Ethernet interface view
Predefined user roles
network-admin
Parameters
ratio: Sets the unknown unicast suppression threshold as a percentage of the interface bandwidth. The value range for this argument (in percentage) is 0 to 100. A smaller value means that less unknown unicast traffic is allowed to pass through.
pps max-pps: Specifies the maximum number of unknown unicast packets that the interface can forward per second. The value range for the max-pps argument (in pps) is 0 to 1.4881 × the interface bandwidth.
kbps max-kbps: Specifies the maximum number of kilobits of unknown unicast traffic that the Ethernet interface can forward per second. The value range for this argument (in kbps) is 0 to the interface bandwidth.
Usage guidelines
The unknown unicast storm suppression feature limits the size of unknown unicast traffic to a threshold on an interface. When the unknown unicast traffic on the interface exceeds this threshold, the system discards packets until the unknown unicast traffic drops below this threshold.
Examples
# Set the unknown unicast storm suppression threshold to 10000 kbps on Twenty-FiveGigE 1/0/1.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] unicast-suppression kbps 10000
Related commands
broadcast-suppression
multicast-suppression
Layer 3 Ethernet interface commands
mtu
Use mtu to set the MTU for an Ethernet interface.
Use undo mtu to restore the default.
Syntax
mtu size
undo mtu
Default
The MTU of an Ethernet interface is 1500 bytes.
Views
Layer 3 Ethernet interface view
Predefined user roles
network-admin
Parameters
size: Sets the MTU in bytes. The value range for this argument is 46 to 9216.
Usage guidelines
The configured MTU takes effect only on the packets forwarded by the CPU. To avoid unnecessary fragmentation, set a proper MTU value.
Examples
# Set the MTU to 1430 bytes for Twenty-FiveGigE 1/0/1.
<Sysname> system-view
[Sysname] interface twenty-fivegige 1/0/1
[Sysname-Twenty-FiveGigE1/0/1] mtu 1430
