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Bulk interface configuration commands
Common Ethernet interface commands
Layer 3 Ethernet interface or subinterface commands
Loopback, null, and inloopback interface commands
reset counters interface loopback
Bulk interface configuration commands
display interface range
Use display interface range to display information about the interface ranges created by using the interface range name command.
Syntax
display interface range [ name name ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
name name: Specifies an interface range by its name, a case-sensitive string of 1 to 32 characters. If you do not specify an interface range name, the command displays information about all existing interface ranges.
Examples
# Display information about the interface ranges created by using the interface range name command.
<Sysname> display interface range
Interface range name t2 gigabitethernet 1/0/1 gigabitethernet 1/0/2
Interface range name test gigabitethernet 1/0/11 gigabitethernet 1/0/12
The output shows the following:
· Interfaces GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 are added to interface range named t2.
· Interfaces GigabitEthernet 1/0/11 and GigabitEthernet 1/0/12 are added to interface range named test.
Related commands
interface range name
interface range
Use interface range to create an interface range and enter the interface range view.
Syntax
interface range interface-list
Views
System view
Predefined user roles
network-admin
Parameters
interface-list: Specifies a space-separated list of up to five interface items. Each item specifies an interface by its type and number or a range of interfaces in the form of interface-type interface-number1 to interface-type interface-number2. When you specify the to keyword, the interfaces before and after the to keyword must be on the same device. The last-tier value of interface-number1 must not be greater than interface-number2. The values of the other tiers of interface-number1 must be the same as interface-number2.
Usage guidelines
Use the command to enter interface range view to bulk configure multiple interfaces with the same feature instead of configuring them one by one. For example, run the shutdown command in interface range view to shut down a range of interfaces.
In interface range view, only the commands supported by the first interface are available. The first interface is specified with the interface range command. To view the commands supported by the first interface in the interface range, enter the interface range view and enter a question mark (?) at the interface range prompt.
After a command is executed in interface range view, one of the following situations might occur:
· The system displays an error message and stays in interface range view. It means that the execution failed on member interfaces in the interface range.
? If the execution failed on the first member interface in the interface range, the command is not executed on any member interfaces.
? If the execution failed on non-first member interfaces, the command takes effect on the other member interfaces.
· The system returns to system view. It means that:
? The command is supported in both system view and interface view.
? The execution failed on a member interface in interface range view and succeeded in system view.
? The command is not executed on the subsequent member interfaces.
You can use the display this command to verify the configuration in interface view of each member interface. In addition, if the configuration in system view is not needed, use the undo form of the command to remove the configuration.
To verify the configuration of the first interface in the interface range, execute the display this command in interface range view.
When you bulk configure interfaces, follow these guidelines:
· Before you configure an interface as the first interface in an interface range, make sure you can enter the view of the interface by using the interface interface-type { interface-number | interface-number.subnumber } command.
· Do not assign both an aggregate interface and any of its member interfaces to an interface range. Some commands, after being executed on both an aggregate interface and its member interfaces, can break up the aggregation.
· No limit is set on the maximum number of interfaces in an interface range. The more interfaces in an interface range, the longer the command execution time.
Examples
# Shut down interfaces GigabitEthernet 1/0/1 through GigabitEthernet 1/0/4.
[Sysname] interface range gigabitethernet 1/0/1 to gigabitethernet 1/0/4
[Sysname-if-range] shutdown
interface range name
Use interface range name name interface interface-list to create an interface range, configure a name for the interface range, and enter the interface range view.
Use interface range name name without the interface keyword to enter the view of an interface range with the specified name.
Use undo interface range name to delete the interface range with the specified name.
Syntax
interface range name name [ interface interface-list ]
undo interface range name name
Views
System view
Predefined user roles
network-admin
Parameters
name: Specifies an interface range name, a case-sensitive string of 1 to 32 characters.
interface-list: Specifies a space-separated list of up to five interface items. Each item specifies an interface by its type and number or a range of interfaces in the form of interface-type interface-number1 to interface-type interface-number2. When you specify the to keyword, the interfaces before and after the to keyword must be on the same device. The last-tier value of interface-number1 must not be greater than interface-number2. The values of the other tiers of interface-number1 must be the same as interface-number2.
Usage guidelines
You can use the command to assign a name to an interface range. Then, you can specify this name rather than the interface range to enter the interface range view.
In interface range view, only the commands supported by the first interface are available. The first interface is specified with the interface range command. To view the commands supported by the first interface in the interface range, enter the interface range view and enter a question mark (?) at the interface range prompt.
After a command is executed in interface range view, one of the following situations might occur:
· The system displays an error message and stays in interface range view. It means that the execution failed on member interfaces in the interface range.
? If the execution failed on the first member interface in the interface range, the command is not executed on any member interfaces.
? If the execution failed on non-first member interfaces, the command takes effect on the other member interfaces.
· The system returns to system view. It means that:
? The command is supported in both system view and interface view.
? The execution failed on a member interface in interface range view and succeeded in system view.
? The command is not executed on the subsequent member interfaces.
You can use the display this command to verify the configuration in interface view of each member interface. In addition, if the configuration in system view is not needed, use the undo form of the command to remove the configuration.
To verify the configuration of the first interface in the interface range, execute the display this command in interface range view.
To view the member interfaces of an interface range, use the display interface range command.
When you bulk configure interfaces, follow these guidelines:
· Before you configure an interface as the first interface in an interface range, make sure you can enter the view of the interface by using the interface interface-type { interface-number | interface-number.subnumber } command.
· Do not assign both an aggregate interface and any of its member interfaces to an interface range. Some commands, after being executed on both an aggregate interface and its member interfaces, can break up the aggregation.
· No limit is set on the maximum number of interfaces in an interface range. The more interfaces in an interface range, the longer the command execution time.
· The maximum number of interface range names is limited only by the system resources. As a best practice to guarantee bulk interface configuration performance, configure fewer than 1000 interface range names.
Examples
# Add GigabitEthernet 1/0/1 through GigabitEthernet 1/0/12 to interface range named myEthPort, and enter the interface range view.
[Sysname] interface range name myEthPort interface gigabitethernet 1/0/1 to gigabitethernet 1/0/12
[Sysname-if-range-myEthPort]
# Enter the view of interface range named myEthPort.
[Sysname] interface range name myEthPort
[Sysname-if-range-myEthPort]
Related commands
display interface range
Ethernet interface commands
The WX1800H series access controllers do not support the slot keyword or the slot-number argument.
Common Ethernet interface commands
bandwidth
Use bandwidth to set the expected bandwidth of an interface.
Use undo bandwidth to restore the default.
Syntax
bandwidth bandwidth-value
undo bandwidth
Default
The expected bandwidth (in kbps) is the interface baud rate divided by 1000.
Views
Ethernet interface view
Ethernet subinterface view
Predefined user roles
network-admin
Parameters
bandwidth-value: Specifies the expected bandwidth in the range of 1 to 400000000 kbps.
Usage guidelines
The expected bandwidth is an informational parameter used only by higher-layer protocols for calculation. You cannot adjust the actual bandwidth of an interface by using this command.
Examples
# Set the expected bandwidth of interface GigabitEthernet 1/0/1 to 1000 kbps.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] bandwidth 1000
# Set the expected bandwidth of subinterface GigabitEthernet 1/0/1.1 to 1000 kbps.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1.1
[Sysname-GigabitEthernet1/0/1.1] bandwidth 1000
Related commands
speed
dampening
Use dampening to enable the device to dampen an interface when the interface is flapping.
Use undo dampening to restore the default.
Syntax
dampening [ half-life reuse suppress max-suppress-time ]
undo dampening
Default
Interface dampening is disabled on Ethernet interfaces.
Views
Ethernet interface view
Predefined user roles
network-admin
Parameters
half-life: Specifies the amount of time (in seconds) after which a penalty is decreased. The interface has an initial penalty of 0. When the interface flaps, the penalty increases by 1000 for each down event until the maximum penalty is reached. When the interface stops flapping, the penalty decreases by half each time the half-life timer expires until the penalty drops to the reuse threshold. The value range for the half-life timer is 1 to 120 seconds, and the default is 54 seconds.
reuse: Specifies the reuse threshold. When the accumulated penalty decreases to this threshold, the interface is not dampened. Interface state changes are reported to the higher layers. The value range for the reuse threshold is 200 to 20000, and the default is 750. The reuse threshold must be less than the suppression threshold.
suppress: Specifies the suppression threshold. This threshold is the accumulated penalty that triggers the device to dampen the interface. In dampened state, the interface does not report its state changes to the higher layers. The value range for the suppression threshold is 200 to 20000, and the default is 2000.
max-suppress-time: Specifies the maximum amount of time the interface can be dampened. If the penalty is still higher than the reuse threshold when this timer expires, the penalty stops increasing for down events. The penalty starts to decrease until it drops below the reuse threshold. The value range for the maximum suppression interval is 1 to 255 seconds, and the default is 162 seconds (three times the half-life timer).
|
|
NOTE: · The maximum penalty is equal to 2(Max-suppress-time/half-life) × reuse threshold. It is not user configurable. · The penalty does not increase for up events. |
Usage guidelines
The interface dampening feature uses an exponential decay mechanism to prevent excessive interface flapping events from adversely affecting routing protocols and routing tables in the network.
If an interface is not dampened, its state changes are reported. For each state change, the system also generates an SNMP notification and log message.
After a flapping interface is dampened, it does not report its state changes to the CPU. For state change events, the interface only generates SNMP notifications and log messages. Suppression of interface state change events protects the system processing resources.
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.
If you do not specify any keywords, this command uses the default values.
Examples
# Enable interface dampening on interface GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] dampening
# Enable interface dampening on interface GigabitEthernet 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 gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] dampening 2 800 3000 5
Related commands
· display interface
default
Use default to restore the default settings for an Ethernet interface or subinterface.
Syntax
default
Views
Ethernet interface view
Ethernet subinterface view
Predefined user roles
network-admin
Usage guidelines
|
|
CAUTION: The default command might interrupt ongoing network services. Make sure you are fully aware of the impacts of this command when you use it in a live network. |
This command might fail to restore the default settings for some commands because of command dependencies or system restrictions. You can use the display this command in interface view to identify these commands, and use their undo forms or follow the command reference to restore their default settings. If your restoration attempt still fails, follow the error message instructions to solve the problem.
Examples
# Restore the default settings for interface GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] default
# Restore the default settings for subinterface GigabitEthernet 1/0/1.1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1.1
[Sysname-GigabitEthernet1/0/1.1] default
description
Use description to change the description of an interface.
Use undo description to restore the default.
Syntax
description text
undo description
Default
The description of an interface is the interface name plus Interface (for example, GigabitEthernet1/0/1 Interface).
Views
Ethernet interface view
Ethernet subinterface view
Predefined user roles
network-admin
Parameters
text: Specifies the interface description, a case-sensitive string of 1 to 255 characters.
Examples
# Change the description of interface GigabitEthernet 1/0/1 to lan-interface.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] description lan-interface
# Change the description of Ethernet subinterface GigabitEthernet 1/0/1.1 to subinterface1/0/1.1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1.1
[Sysname-GigabitEthernet1/0/1.1] description subinterface1/0/1.1
display counters
Use display counters to display interface traffic statistics.
Syntax
display counters { inbound | outbound } interface [ interface-type [ interface-number | interface-number.subnumber ] ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
inbound: Displays inbound traffic statistics.
outbound: Displays outbound traffic statistics.
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.
Usage guidelines
This command displays traffic statistics within a statistics polling interval specified by using the flow-interval command.
To clear the Ethernet interface traffic statistics, use the reset counters interface command. For more information, see "reset counters interface."
If you do not specify an interface type, this command displays traffic statistics for all interfaces that have traffic counters.
If you specify an interface type but do not specify an interface number or subinterface number, this command displays traffic statistics for all interfaces of the specified type.
If you specify an interface type and an interface or subinterface number, this command displays traffic statistics for the specified interface or subinterface.
Examples
# Display inbound traffic statistics for all GigabitEthernet interfaces.
<Sysname> display counters inbound interface gigabitethernet
Interface Total (pkts) Broadcast (pkts) Multicast (pkts) Err (pkts)
GE1/0/1 100 100 0 0
GE1/0/2 0 0 0 0
GE1/0/3 0 0 0 0
GE1/0/4 0 0 0 0
Overflow: More than 14 digits (7 digits for column "Err").
--: Not supported.
Table 1 Command output
|
Field |
Description |
|
Interface |
Abbreviated interface name. |
|
Total (pkts) |
Total number of packets received or sent through the interface. |
|
Broadcast (pkts) |
Total number of broadcast packets received or sent through the interface. |
|
Multicast (pkts) |
Total number of multicast packets received or sent through the interface. |
|
Err (pkts) |
Total number of error packets received or sent through the interface. |
|
Overflow: More than 14 digits (7 digits for column "Err") |
The command displays Overflow when any of the following conditions exist: · The data length of an Err field value is greater than 7 decimal digits. · The data length of a non-Err field value is greater than 14 decimal digits. |
|
--: Not supported |
The statistical item is not supported. |
Related commands
· flow-interval
· reset counters interface
display counters rate
Use display counters rate to display traffic rate statistics for interfaces in up state over the last statistics polling interval.
Syntax
display counters rate { inbound | outbound } interface [ interface-type [ interface-number | interface-number.subnumber ] ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
inbound: Displays inbound traffic rate statistics.
outbound: Displays outbound traffic rate statistics.
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.
Usage guidelines
If you do not specify an interface type, this command displays traffic rate statistics for all up interfaces that have traffic counters over the last statistics polling interval.
If you specify an interface type, this command displays traffic rate statistics for all up interfaces of the specified type over the last statistics polling interval.
If an interface that you specify is always down over the last statistics polling interval, the system prompts that the interface does not support the command.
You can configure the statistics polling interval by using the flow-interval command.
Examples
# Display the inbound traffic rate statistics for all GigabitEthernet interfaces.
<Sysname> display counters rate inbound interface gigabitethernet
Usage: Bandwidth utilization in percentage
Interface Usage (%) Total (pps) Broadcast (pps) Multicast (pps)
GE1/0/1 3 200 100 100
GE1/0/2 5 300 200 100
GE1/0/3 5 300 200 100
Overflow: More than 14 digits.
--: Not supported.
Table 2 Command output
|
Field |
Description |
|
Interface |
Abbreviated interface name. |
|
Usage (%) |
Bandwidth usage (in percentage) of the interface over the last statistics polling interval. |
|
Total (pkts/sec) |
Average receiving or sending rate (in pps) for unicast packets over the last statistics polling interval. |
|
Broadcast (pkts/sec) |
Average receiving or sending rate (in pps) for broadcast packets over the last statistics polling interval. |
|
Multicast (pkts/sec) |
Average receiving or sending rate (in pps) for multicast packets over the last statistics polling interval. |
|
Overflow: more than 14 decimal digits |
The command displays Overflow if the data length of a statistical item is greater than 14 decimal digits. |
|
--: not supported |
The statistical item is not supported. |
Related commands
· flow-interval
· reset counters interface
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 an IRF member device by its member ID.
Examples
# (IRF-incapable devices.) Display the Ethernet module statistics.
<Sysname> display ethernet statistics
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
# (IRF-capable devices.) Display the Ethernet module statistics for IRF member device 2.
<Sysname> display ethernet statistics slot 2
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 3 Output description
|
Field |
Description |
|
ETH receive packet statistics |
Statistics about the Ethernet packets received on 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. · 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. The device does not support this field in the current software version. · ISIS—Number of IS-IS packets. The device does not support this field in the current software version. · ISIS2—Number of large 802.3/802.2 frames encapsulated by using IS-IS. The device does not support this field in the current software version. · IP—Number of IP packets. · IPv6—Number of IPv6 packets. |
|
ETH receive error statistics |
Statistics about the error Ethernet packets in the outbound 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. · MbufRelayNum—Number of packets transparently sent. |
|
ETH send error statistics |
Statistics about the error Ethernet packets in the outbound direction on the Ethernet module: · 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 | 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 27 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 except VA interfaces.
If you specify an interface type but do not specify an interface number or subinterface number, this command displays information about all interfaces of that type.
If you specify both the interface type and interface or subinterface number, this command displays information about the specified interface or subinterface.
Examples
# Display information about Layer 3 interface GigabitEthernet 1/0/1.
<Sysname> display interface gigabitethernet1/0/1
GigabitEthernet1/0/1
Current state: Administratively DOWN
Line protocol state: DOWN
Description: GigabitEthernet1/0/1 Interface
Bandwidth: 1000000kbps
Maximum transmission unit: 1500
Internet protocol processing: Disabled
IP packet frame type: Ethernet II, hardware address: 3822-d666-bd0c
IPv6 packet frame type: Ethernet II, hardware address: 3822-d666-bd0c
Loopback is not set
Media type is twisted pair, promiscuous mode set
Port priority: 2
Unknown-speed mode, unknown-duplex mode
Last link flapping: 6 hours 39 minutes 28 seconds
Last clearing of counters: Never
Last 300 second input: 0 packets/sec 0 bytes/sec 0%
Last 300 second output: 0 packets/sec 0 bytes/sec 0%
Input (total): 0 packets, 0 bytes
0 unicasts, 0 broadcasts, 0 multicasts, - pauses
Input (normal): 0 packets, 0 bytes
0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses
Input: 0 input errors, 0 runts, 0 giants, 0 throttles
0 CRC, 0 frame, 0 overruns, - aborts
- ignored, - parity errors
Output (total): 0 packets, 0 bytes
0 unicasts, 0 broadcasts, 0 multicasts, - pauses
Output (normal): 0 packets, 0 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
- lost carrier, - no carrier
Peak input rate: 0 bytes/sec, at 2013-07-07 16:07:11
Peak output rate: 0 bytes/sec, at 2013-07-07 16:07:11
# Display detailed information about Layer 2 interface GigabitEthernet 1/0/1.
<Sysname> display interface gigabitethernet 1/0/1
GigabitEthernet1/0/1
Current state: DOWN
Line protocol state: DOWN
IP packet frame type: Ethernet II, hardware address: 000c-2963-b767
Description: GigabitEthernet1/0/1 Interface
Bandwidth: 100000kbps
Loopback is not set
Media type is twisted pair, promiscuous mode set
Unknown-speed mode, unknown-duplex mode
Link speed type is autonegotiation, link duplex type is autonegotiation
Flow-control is not enabled
Maximum frame length: 4000
Allow jumbo frame to pass
Broadcast max-ratio: 100%
Multicast max-ratio: 100%
Unicast max-ratio: 100%
PVID: 1
MDI type: Automdix
Port link-type: Access
Tagged VLANs: None
UnTagged VLANs: 1
Port priority: 2
Last clearing of counters: 14:34:09 Tue 11/01/2011
Peak input rate: 0 bytes/sec, at 2013-07-17 22:06:19
Peak output rate: 0 bytes/sec, at 2013-07-17 22:06:19
Last 300 second input: 0 packets/sec 0 bytes/sec -%
Last 300 second 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, 0 bytes
0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses
Input: 0 input errors, 0 runts, 0 giants, 0 throttles
0 CRC, 0 frame, 0 overruns, 0 aborts
0 ignored, 0 parity errors
Output (total): 0 packets, 0 bytes
0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses
Output (normal): 0 packets, 0 bytes
0 unicasts, 0 broadcasts, 0 multicasts, 0 pauses
Output: 0 output errors, 0 underruns, 0 buffer failures
0 aborts, 0 deferred, 0 collisions, 0 late collisions
0 lost carrier, 0 no carrier
Table 4 Command output
|
Field |
Description |
|
Current state |
State of the interface: · Administratively DOWN—The interface was shut down with the shutdown command. · DOWN—The interface is administratively up but physically down. There might not be a physical link present or the link has failed. · DOWN ( Link-Aggregation interface down )—The aggregate interface to which the interface belongs was shut down with the shutdown command. · DOWN ( Tunnel-Bundle administratively down )—The tunnel bundle interface to which the interface belongs was shut down with the shutdown command. The device does not support this field in the current software version. · ETH-rddc Shutdown—The interface was shut down by the Reth module. The device does not support this field in the current software version. · IRF-link-down—The interface was shut down because IRF detected that the IRF link was down on the MDC of the IRF member device where the interface resides. The device does not support this field in the current software version. · mac-address moving down—The interface was shut down because of a MAC address move. · MAD ShutDown—The interface was shut down because the IRF fabric to which the interface belongs split and was in recovery state. The device does not support this field in the current software version. · Storm-Constrain—The interface was shut down because the number of multicast, broadcast, or unknown unicast packets exceeds the threshold. The device does not support this field in the current software version. · STP DOWN—The interface was shut down by BPDU guard. · UP—The interface is both administratively and physically up. |
|
Line protocol state |
Data link layer state of the interface. The state is determined through parameter negotiation at the data link layer. · UP—The interface is up at the data link layer. · UP (spoofing)—The data link layer protocol of the interface is UP. However, its link is an on-demand link or not present. This attribute is typical of Null interfaces and loopback interfaces. · DOWN—The data link layer protocol of the interface is down. · DOWN (protocol)—The data link layer of the interface is shut down by one or more protocols. The protocol argument can be an arbitrary combination of these protocols: DLDP, OAM, LAGG, BFD, and MACSEC. ? When protocol contains DLDP, the data link layer of the interface is down because DLDP detected that the link was unidirectional. The device does not support this field in the current software version. ? When protocol contains OAM, the data link layer of the interface is down because OAM detected remote link failures. The device does not support this field in the current software version. ? When protocol contains LAGG, the data link layer of the interface is down because the aggregate interface does not have Selected ports. The device does not support this field in the current software version. ? When protocol contains BFD, the data link layer of the interface is down because BFD detected a link failure. The device does not support this field in the current software version. ? When protocol contains MACSEC, the data link layer of the interface is down because MACSEC failed to negotiate the encryption parameters. The device does not support this field in the current software version. |
|
Bandwidth |
Expected bandwidth of the interface. |
|
Maximum transmission unit |
MTU of the interface. |
|
Internet protocol processing: Disabled |
The interface cannot process IP packets. |
|
Internet Address is 192.168.1.200/24 Primary |
Primary IP address of the interface. |
|
IP packet frame type |
Ethernet framing format. PKTFMT_ETHNT_2 indicates that the frames are encapsulated in Ethernet II framing format. |
|
hardware address |
MAC address of the interface. |
|
IPv6 packet frame type |
IPv6 packet framing format. |
|
Output queue |
Information about the output queue. |
|
Urgent queuing |
Urgent queue. |
|
Protocol queuing |
Protocol queue. |
|
FIFO queuing |
FIFO queue. |
|
Size |
Number of packets in the queue. |
|
Length |
Queue length. |
|
Discards |
Number of discarded packets. |
|
Loopback is set internal |
An internal loopback test is running on the interface. |
|
Loopback is set external |
An external loopback test is running on the interface. |
|
Loopback is not set |
No loopback test is running on the interface. |
|
10Mbps-speed mode |
The interface is operating at 10 Mbps. |
|
100Mbps-speed mode |
The interface is operating at 100 Mbps. |
|
1000Mbps-speed mode |
The interface is operating at 1000 Mbps. |
|
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. |
|
full-duplex mode |
The interface is operating in full duplex mode. |
|
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, 10 Mbps or 100 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. |
|
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. |
|
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. |
|
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. |
|
Port priority |
Priority of the interface. |
|
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 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. |
|
Last 300 second input: 0 packets/sec 0 bytes/sec 0% Last 300 second 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: · 1518 bytes (without VLAN tags). · 1522 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 1518 bytes (without VLAN tags) or 1522 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. The device does not support this field in the current software version. |
|
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. The device does not support this field in the current software version. |
|
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. |
# 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
CMTunnel1 DOWN DOWN --
InLoop0 UP UP(s) --
Loop0 UP UP(s) --
MGE0/0/0 UP UP 192.168.100.66
NULL0 UP UP(s) --
Tun0 DOWN DOWN --
Tun1 DOWN DOWN --
Tun2 DOWN DOWN --
Tun99 DOWN DOWN --
Tun101 DOWN DOWN --
Vlan1 DOWN DOWN --
Vlan2 DOWN DOWN --
Vlan10 DOWN DOWN 10.1.1.1
Vlan20 DOWN DOWN --
Vlan100 DOWN DOWN --
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
BAGG1 DOWN auto A A 1
BAGG2 DOWN auto A A 20
BAGG3 DOWN auto A T 1
GE1/0/1 DOWN auto A A 1
GE1/0/2 DOWN auto A T 1
GE1/0/3 DOWN auto A A 1
GE1/0/4 ADM auto A A 1
GE1/0/5 DOWN auto A A 1
GE1/0/6 DOWN auto A A 1
GE1/0/7 DOWN auto A A 1
GE1/0/8 DOWN auto A A 1
XGE1/0/9 DOWN auto A A 1
XGE1/0/10 DOWN auto A A 1
# Display brief information about interface GigabitEthernet 1/0/3, including the complete description of the interface.
<Sysname> display interface gigabitethernet 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
GE1/0/3 UP 100M(a) F(a) A 1 link to router C
# 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
GE1/0/1 DOWN Not connected
Brief information on interfaces in bridge mode:
Link: ADM - administratively down; Stby - standby
Interface Link Cause
GE1/0/2 DOWN Not connected
GE1/0/4 DOWN Not connected
GE1/0/5 DOWN Not connected
GE1/0/7 DOWN Not connected
Table 5 Command output
|
Field |
Description |
|
Brief information on interfaces in route mode: |
Brief information about Layer 3 interfaces. |
|
Link: ADM - administratively down; Stby - standby |
Link status: · ADM—The interface has been shut down by the network administrator. To recover its physical layer state, use the undo shutdown command. · Stby—The interface is operating as a backup interface. To see the primary interface, use the display interface-backup state command. |
|
Protocol: (s) – spoofing |
This field displays UP (s), where s represents the spoofing flag, when the following conditions exist: · The data link layer protocol of the interface is UP. · The link of the interface is an on-demand link or not present. This attribute is typical of interface Null 0 and loopback 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 administratively shut down. To bring up the interface, use the undo shutdown command. · Stby—The interface is a standby interface. |
|
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. However, the link is an on-demand link or not present. This value is typical of interface Null 0 and loopback interfaces. |
|
Primary IP |
Primary IP address of the interface. A hyphen (-) indicates that the interface is not configured with an IP address. |
|
Description |
Partial or complete interface description set by using the description command: · If you do not specify the description keyword for the display interface brief command, this field displays only the first 27 characters of the interface description. · If you specify the description keyword for the display interface brief command, this field displays the complete interface description. |
|
Brief information of interfaces in bridge mode: |
Brief information about Layer 2 interfaces. |
|
Speed: (a) - auto |
If the speed of an interface is automatically negotiated, the speed attribute of the interface includes the autonegotiation flag (the letter a in parentheses). If an interface is configured to autonegotiate its speed but the autonegotiation has not started, its speed attribute is displayed as auto. |
|
Duplex: (a)/A - auto; H - half; F – full |
If the duplex mode of an interface is automatically negotiated, the duplex mode attribute of the interface includes the letter a in parentheses. H indicates the half duplex mode. F indicates the full duplex mode. If an interface is configured to autonegotiate its duplex mode but the autonegotiation has not started, its duplex mode attribute is displayed as A. |
|
Type: A - access; T - trunk; H – hybrid |
Link type options for interfaces. |
|
Speed |
Interface rate, in bps. |
|
Duplex |
Duplex mode of the interface: · A—Autonegotiation. · 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 is 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 shut down. · DOWN (Loopback detection down)—The interface is shut down because the loopback detection module has detected loops. · DOWN ( Monitor-Link uplink down )—The interface is shut down because the monitor link module has detected that the uplink is down. · IRF-link-down—When IRF detects that the IRF link is down on an MDC of a member device, the physical interfaces except the excluded ports on the MDC are physically down. The device does not support this field in the current software version. · MAD ShutDown—After an IRF split, all interfaces except the excluded ports in the IRF in recovery state are physically down. The device does not support this field in the current software version. · Not connected—The interface is down because no physical connection exists (possibly because the network cable is disconnected or faulty). · Storm-Constrain—The interface is shut down because the unknown unicast traffic, multicast traffic, or broadcast traffic exceeds the upper threshold. The device does not support this field in the current software version. · STP DOWN—The interface is shut down by the STP BPDU guard function. · Port Security Disabled—The interface is shut down by the intrusion detection mechanism because the port receives illegal packets. · Standby—The interface is in Standby state. |
reset counters interface
display packet-drop
Use display packet-drop to display information about packets dropped on an interface or multiple interfaces.
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. If you do not specify an interface type, this command displays information about dropped packets on all interfaces on the device.
interface-number: Specifies an interface number. If you specify an interface type only, this command displays information about dropped packets on the specified type of interfaces.
summary: Displays the summary of dropped packets on all interfaces.
Examples
# Display information about dropped packets on GigabitEthernet 1/0/1.
<Sysname> display packet-drop interface gigabitethernet 1/0/1
GigabitEthernet1/0/1:
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: 321
Packets dropped due to rate-limit: 143
Packets dropped due to broadcast-suppression: 301
Packets dropped due to unicast-suppression: 215
Packets dropped due to multicast-suppression: 241
Packets dropped due to Tx packet aging: 246
# Display the summary of dropped packets on all interfaces.
<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: 321
Packets dropped due to rate-limit: 143
Packets dropped due to broadcast-suppression: 301
Packets dropped due to unicast-suppression: 215
Packets dropped due to multicast-suppression: 241
Packets dropped due to Tx packet aging: 246
Table 6 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 rate-limit |
Packets that are dropped due to the rate limit set on the device. |
|
Packets dropped due to broadcast-suppression |
Packets that are dropped due to broadcast suppression. The device does not support this field in the current software version. |
|
Packets dropped due to unicast-suppression |
Packets that are dropped due to unknown unicast suppression. The device does not support this field in the current software version. |
|
Packets dropped due to multicast-suppression |
Packets that are dropped due to multicast suppression. The device does not support this field in the current software version. |
|
Packets dropped due to Tx packet aging |
Outbound packets that are timed out. |
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
10-GE interfaces operate in full duplex mode, and all other types of 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.
Examples
# Configure interface GigabitEthernet 1/0/1 to operate in full duplex mode.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] 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
The following matrix shows the command and hardware compatibility:
|
Hardware series |
Model |
Command compatibility |
|
WX1800H series |
WX1804H WX1810H WX1820H WX1840H |
No |
|
WX3800H series |
WX3820H WX3840H |
Yes |
|
WX5800H series |
WX5860H |
Yes |
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 GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] 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
The following matrix shows the command and hardware compatibility:
|
Hardware series |
Model |
Command compatibility |
|
WX1800H series |
WX1804H WX1810H WX1820H WX1840H |
No |
|
WX3800H series |
WX3820H WX3840H |
Yes |
|
WX5800H series |
WX5860H |
Yes |
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 GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] flow-control receive enable
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 GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] flow-interval 100
interface
Use interface to enter interface or subinterface view.
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.
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.
Usage guidelines
When the interface-number.subnumber argument is specified, and the specified subinterface does not exist, this command creates the subinterface and enters subinterface view.
Examples
# Enter GigabitEthernet 1/0/1 interface view.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1]
# Create Ethernet subinterface GigabitEthernet 1/0/1.1 and enter GigabitEthernet 1/0/1.1 subinterface view.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1.1
[Sysname-GigabitEthernet1/0/1.1]
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.
Syntax
jumboframe enable [ value ]
undo jumboframe enable
Default
The device allows jumbo frames within a specific length to pass through.
Views
Layer 2 Ethernet interface view
Layer 3 Ethernet interface view
Predefined user roles
network-admin
Parameters
value: Sets the maximum length (in bytes) of Ethernet frames that are allowed to pass through. The following matrix shows the value ranges for the value argument:
|
Hardware series |
Model |
Value range |
|
WX1800H series |
WX1804H WX1810H WX1820H WX1840H |
1518 to 4000 |
|
WX3800H series |
WX3820H WX3840H |
1700 to 4000 |
|
WX5800H series |
WX5860H |
1700 to 3996 |
Usage guidelines
If you set the value argument multiple times, the most recent configuration takes effect.
Examples
# Allow jumbo frames to pass through GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] jumboframe 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 { external | internal }
undo loopback
Default
Loopback testing is disabled on an Ethernet interface.
Views
Ethernet interface view
Predefined user roles
network-admin
Parameters
external: Enables external loopback testing on the Ethernet interface.
internal: Enables internal loopback testing on the Ethernet interface.
Usage guidelines
The shutdown and loopback commands are exclusive with each other.
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 GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] loopback internal
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
Views
Ethernet interface view
Predefined user roles
network-admin
Parameters
bridge: Specifies the Layer 2 mode.
route: Specifies the Layer 3 mode.
Usage guidelines
The following matrix shows the command and hardware compatibility:
|
Hardware series |
Model |
Command compatibility |
|
WX1800H series |
WX1804H WX1810H WX1820H WX1840H |
Yes |
|
WX3800H series |
WX3820H WX3840H |
No |
|
WX5800H series |
WX5860H |
No |
Interfaces operate differently depending on the hardware structure. For a device:
· Some Ethernet interfaces can operate only as Layer 3 Ethernet interfaces (in route mode).
· Some 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 or route for these Ethernet interfaces.
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.
Examples
# Configure GigabitEthernet 1/0/1 to operate in Layer 2 mode.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] port link-mode bridge
reset counters interface
Use reset counters interface to clear the Ethernet interface or subinterface statistics.
Syntax
reset counters interface [ interface-type [ interface-number | interface-number.subnumber ] ]
Views
User view
Predefined user roles
network-admin
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.
Usage guidelines
Use this command to clear history statistics if you want to collect traffic statistics for a specific time period.
If you do not specify an interface type, this command clears statistics for all interfaces except VA interfaces.
If you specify only the interface type, this command clears statistics for all interfaces of that type.
If you specify both the interface type and the interface or subinterface number, this command clears statistics for the specified interface or subinterface.
Examples
# Clear the statistics for GigabitEthernet 1/0/1.
<Sysname> reset counters interface gigabitethernet 1/0/1
Related commands
· display interface
· display counters interface
· display counters rate interface
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 an IRF member device by its member ID. If you do not specify a member device, this command clears statistics for all IRF member devices.
Examples
# Clear the Ethernet module statistics for IRF member device 2.
<Sysname> reset ethernet statistics slot 2
Related commands
display ethernet statistics
reset packet-drop interface
Use reset packet-drop interface to clear the dropped packet statistics for an interface or multiple interfaces.
Syntax
reset packet-drop interface [ interface-type [ interface-number ] ]
Views
User view
Predefined user roles
network-admin
Parameters
interface-type: Specify an interface type. If you do not specify an interface type, this command clears dropped packet statistics for all interfaces on the device.
interface-number: Specify an interface number. If you do not specify this argument, the command clears dropped packet statistics for all interfaces of the specified type.
Examples
# Clear dropped packet statistics for GigabitEthernet 1/0/1.
<Sysname> reset packet-drop interface gigabitethernet 1/0/1
# Clear dropped packet statistics for all interfaces.
<Sysname> reset packet-drop interface
Related commands
display packet-drop
shutdown
Use shutdown to shut down an Ethernet interface or subinterface.
Use undo shutdown to bring up an Ethernet interface or subinterface.
Syntax
shutdown
undo shutdown
Default
An Ethernet interface or subinterface is up.
Views
Ethernet interface view
Ethernet subinterface view
Predefined user roles
network-admin
Usage guidelines
Some interface configurations might require an interface restart before taking effect.
The shutdown and loopback commands are exclusive with each other.
Examples
# Shut down and then bring up GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] shutdown
[Sysname-GigabitEthernet1/0/1] undo shutdown
# Shut down and then bring up GigabitEthernet 1/0/1.1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1.1
[Sysname-GigabitEthernet1/0/1.1] shutdown
[Sysname-GigabitEthernet1/0/1.1] undo shutdown
speed
Use speed to set the speed of an Ethernet interface.
Use undo speed to restore the default.
Syntax
speed { 100 | 1000 | auto }
undo speed
Default
An Ethernet interface automatically negotiates a speed with its peer.
Views
Ethernet interface view
Predefined user roles
network-admin
Parameters
100: Sets the interface speed to 100 Mbps. The following matrix shows the support of hardware platforms for this keyword.
|
Hardware series |
Model |
Parameter compatibility |
|
WX1800H series |
WX1804H WX1810H WX1820H WX1840H |
Yes |
|
WX3800H series |
WX3820H WX3840H |
Yes |
|
WX5800H series |
WX5860H |
No |
1000: Sets the interface speed to 1000 Mbps.
auto: Enables the interface to negotiate a speed with its peer.
Usage guidelines
GE interfaces on the WX1804H, WX1810H, and WX1820H devices do not support the downshift feature. When the GE interfaces on these devices are connected by a 100 Mbps cable, set the interface speed as follows:
· Set the speed of one GE interface to 100 Mbps.
· Set the speed of the other GE interface to 100 Mbps or configure the interface to autonegotiate the speed.
For an Ethernet copper port, use the speed command to set its speed to match the speed of the peer interface.
For a fiber port, use the speed command to set its speed to match the rate of a transceiver module.
Examples
# Configure GigabitEthernet 1/0/1 to autonegotiate the speed.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] speed auto
Layer 3 Ethernet interface or subinterface commands
The following matrix shows the Layer 3 Ethernet interface/subinterface and hardware compatibility:
|
Hardware series |
Model |
Feature compatibility |
|
WX1800H series |
WX1804H WX1810H WX1820H WX1840H |
Yes |
|
WX3800H series |
WX3820H WX3840H |
No |
|
WX5800H series |
WX5860H |
No |
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
The default setting for this command varies by device model.
Views
Layer 3 Ethernet interface view
Predefined user roles
network-admin
Parameters
mac-address: Specifies a MAC address in the format of H-H-H.
Usage guidelines
When you set a MAC address for a Layer 3 Ethernet subinterface, select a MAC address different from that of the main interface.
Examples
# Set the MAC address of GigabitEthernet 1/0/1 to 0001-0001-0001.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] 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 following matrix shows the default values for the size argument:
|
Hardware series |
Model |
Default |
|
WX1800H series |
WX1804H WX1810H WX1820H WX1840H |
1500 |
|
WX3800H series |
WX3820H WX3840H |
Not supported. |
|
WX5800H series |
WX5860H |
Not supported. |
Views
Layer 3 Ethernet interface view
Layer 3 Ethernet subinterface view
Predefined user roles
network-admin
Parameters
size: Sets the MTU in bytes. The following matrix shows the value ranges for the size argument:
|
Hardware series |
Model |
Value range |
|
WX1800H series |
WX1804H WX1810H WX1820H WX1840H |
|
|
WX3800H series |
WX3820H WX3840H |
Not supported. |
|
WX5800H series |
WX5860H |
Not supported. |
Examples
# Set the MTU to 1430 bytes for Layer 3 Ethernet interface GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] mtu 1430
# Set the MTU to 1430 bytes for Layer 3 Ethernet subinterface GigabitEthernet 1/0/1.1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1.1
Loopback, null, and inloopback interface commands
bandwidth
Use bandwidth to configure the expected bandwidth of an interface.
Use undo bandwidth to restore the default.
Syntax
bandwidth bandwidth-value
undo bandwidth
Default
The expected bandwidth of a loopback interface is 0 kbps.
Views
Loopback interface view
Predefined user roles
network-admin
Parameters
bandwidth-value: Specifies the expected bandwidth in the range of 1 to 400000000 kbps.
Usage guidelines
The expected bandwidth is an informational parameter used only by higher-layer protocols for calculation. You cannot adjust the actual bandwidth of an interface by using this command.
Examples
# Set the expected bandwidth of Loopback 0 to 1000 kbps.
<Sysname> system-view
[Sysname] interface loopback 0
[Sysname-LoopBack0] bandwidth 1000
default
Use default to restore the default settings for a loopback or null interface.
Syntax
default
Views
Loopback interface view
Null interface view
Predefined user roles
network-admin
Usage guidelines
|
|
CAUTION: The default command might interrupt ongoing network services. Make sure you are fully aware of the impacts of this command before using it on a live network. |
This command might fail to restore the default settings for some commands for reasons such as command dependencies and system restrictions. Use the display this command in interface view to identify these commands, and then use their undo forms or follow the command reference to restore their default settings. If your restoration attempt still fails, follow the error message instructions to resolve the problem.
Examples
# Restore the default settings for interface loopback 0.
<Sysname> system-view
[Sysname] interface loopback 0
[Sysname-LoopBack0] default
description
Use description to set a description for an interface.
Use undo description to restore the default.
Syntax
description text
undo description
Default
The description of a loopback or null interface is the interface name plus Interface (for example, LoopBack0 Interface).
Views
Loopback interface view
Null interface view
Predefined user roles
network-admin
Parameters
text: Specifies an interface description, a case-sensitive string of 1 to 255 characters.
Usage guidelines
Configure a description for an interface for easy identification and management purposes.
You can use the display interface command to view the configured description.
Examples
# Set the description to for RouterID for interface loopback 0.
<Sysname> system-view
[Sysname] interface loopback 0
[Sysname-LoopBack0] description for RouterID
display interface inloopback
Use display interface inloopback to display information about the inloopback interface.
Syntax
display interface [ inloopback [ 0 ] ] [ brief [ description | down ] ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
0: Specifies interface Inloopback 0.
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 27 characters of interface descriptions. The description of an inloopback interface is always InLoopBack0 Interface and cannot be configured.
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 the inloopback keyword is not specified, the command displays information about all interfaces of the device.
If the inloopback keyword is specified but the 0 keyword is not specified, the command displays information about interface Inloopback 0. This is because the device has only one inloopback interface Inloopback 0.
Examples
# Display detailed information about interface Inloopback 0.
<Sysname> display interface inloopback
InLoopBack0
Current state: UP
Line protocol state: UP(spoofing)
Description: InLoopBack0 Interface
Maximum transmit unit: 1536
Physical: InLoopBack
Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Input: 0 packets, 0 bytes, 0 drops
Output: 0 packets, 0 bytes, 0 drops
Table 7 Command output
|
Field |
Description |
|
Current state |
Physical layer state of the interface, which is always UP, meaning that the inloopback interface can receive and transmit packets. |
|
Line protocol state |
Data link layer protocol state of the interface, which is always UP(spoofing). UP(spoofing) means that the data link layer protocol state of the interface is up, but the link is an on-demand link or is not present. |
|
Description |
Description string of the interface, which is always InLoopBack0 Interface and cannot be configured. |
|
Maximum transmit unit |
MTU of the interface, which is always 1536 and cannot be configured |
|
Physical: InLoopBack |
The physical type of the interface is inloopback. |
|
Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec |
Average input rate during the last 300 seconds (displayed when the interface supports traffic statistics collection): · bytes/sec—Average number of bytes received per second. · bits/sec—Average number of bits received per second. · packets/sec—Average number of packets received per second. |
|
Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec |
Average output rate over the last 300 seconds (displayed when the interface supports traffic statistics collection): · bytes/sec—Average number of bytes sent per second. · bits/sec—Average number of bits sent per second. · packets/sec—Average number of packets sent per second. |
|
Input: 0 packets, 0 bytes, 0 drops |
Total number and size (in bytes) of incoming packets of the interface and the number of dropped packets (displayed when the interface supports traffic statistics collection). |
|
Output: 0 packets, 0 bytes, 0 drops |
Total number and size (in bytes) of outgoing packets of the interface and the number of dropped packets (displayed when the interface supports traffic statistics collection). |
# Display brief information about interface Inloopback 0.
<Sysname> display interface inloopback 0 brief
Brief information on interfaces in route mode:
Link: ADM - administratively down; Stby - standby
Protocol: (s) - spoofing
Interface Link Protocol Primary IP Description
InLoop0 UP UP(s) --
Table 8 Command output
|
Field |
Description |
|
Brief information on interfaces in route mode: |
Brief information about the inloopback interface. |
|
Link: ADM - administratively down; Stby - standby |
Explains the Link field values: · ADM—The interface has been shut down by the network administrator. To recover its physical layer state, run the undo shutdown command. · Stby—The interface is a standby interface. To view the primary interface information, run the display interface-backup state command. |
|
Protocol: (s) - spoofing |
Explains the Protocol field value. (s) represents spoofing. If the data link layer protocol of an interface is up, but its link is an on-demand link or is not present, the Protocol field displays UP(s). This attribute is typical of interface Null 0, Inloopback 0, and loopback interfaces. |
|
Interface |
Interface name. |
|
Link |
Physical layer state of the interface, which is always UP, meaning that the link is physically up. |
|
Protocol |
Data link layer protocol state of the interface, which is always UP(s). |
|
Primary IP |
IP address of the interface. Because inloopback interfaces do not support CLI configuration, this field does not display a value. |
|
Description |
Interface description configured by using the description command. Because inloopback interfaces do not support CLI configuration, this field does not display a value. |
display interface loopback
Use display interface loopback to display information about the specified or all existing loopback interfaces.
Syntax
display interface [ loopback [ interface-number ] ] [ brief [ description | down ] ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
interface-number: Specifies a loopback interface by its number, which can be the number of any existing loopback interface. If you do not specify this argument, the command displays information about all existing loopback interfaces on the device.
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 27 characters of interface descriptions.
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
This command is supported only after a loopback interface is created.
If the loopback keyword is not specified, the command displays information about all interfaces of the device.
If the loopback keyword is specified but the interface-number argument is not specified, the command displays information about all existing loopback interfaces.
Examples
# Display detailed information about interface loopback 0. (Suppose the loopback interface supports traffic statistics collection.)
<Sysname> display interface loopback 0
LoopBack0
Current state: UP
Line protocol state: UP(spoofing)
Description: LoopBack0 Interface
Bandwidth: 1000kbps
Maximum transmit unit: 1536
Internet protocol processing: Disabled
Physical: Loopback
Last clearing of counters: Never
Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Input: 0 packets, 0 bytes, 0 drops
Output: 0 packets, 0 bytes, 0 drops
# Display detailed information about interface loopback 0. (Suppose the loopback interface does not support traffic statistics collection.)
<Sysname> display interface loopback 0
LoopBack0
Current state: UP
Line protocol state: UP(spoofing)
Description: LoopBack0 Interface
Maximum transmit unit: 1536
Internet protocol processing : Disabled
Physical: Loopback
Last clearing of counters: Never
|
Field |
Description |
|
Current state |
Physical layer state of the interface: · UP—The loopback interface can receive and transmit packets. · Administratively DOWN—The interface was manually shut down by using the shutdown command. |
|
Line protocol state |
Data link layer protocol state of the interface. UP (spoofing) means that the data link layer protocol state of the interface is up, but the link is an on-demand link or is not present. |
|
Description |
Description string of the interface. |
|
Bandwidth |
Expected bandwidth of the interface. This field is not displayed when the value is 0. |
|
MTU of the interface. |
|
|
Indicates that the interface cannot process Layer 3 packets (displayed when the interface is not configured with an IP address). |
|
|
Internet address: is 1.1.1.1/32(primary) |
Primary IP address of the interface (displayed when the interface is configured with a primary IP address). |
|
Physical: Loopback |
The physical type of the interface is loopback. |
|
Last clearing of counters |
Time when statistics on the logical interface were last cleared by using the reset counters interface command. If the statistics of the interface have never been cleared by using the reset counters interface command since the device started, this field displays Never. |
|
Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec |
Average input rate during the last 300 seconds (displayed when the interface supports traffic statistics collection): · bytes/sec—Average number of bytes received per second. · bits/sec—Average number of bits received per second. · packets/sec—Average number of packets received per second. |
|
Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec |
Average output rate over the last 300 seconds (displayed when the interface supports traffic statistics collection): · bytes/sec—Average number of bytes sent per second. · bits/sec—Average number of bits sent per second. · packets/sec—Average number of packets sent per second. |
|
Input: 0 packets, 0 bytes, 0 drops |
Total number and size (in bytes) of incoming packets of the interface and the number of dropped packets (displayed when the interface supports traffic statistics collection). |
|
Output: 0 packets, 0 bytes, 0 drops |
Total number and size (in bytes) of outgoing packets of the interface and the number of dropped packets (displayed when the interface supports traffic statistics collection). |
# Display brief information about all loopback interfaces.
<Sysname> display interface loopback brief
Brief information on interfaces in route mode:
Link: ADM - administratively down; Stby - standby
Protocol: (s) - spoofing
Interface Link Protocol Primary IP Description
Loop1 UP UP(s) -- forLAN1
# Display information about all loopback interfaces in down state and the causes.
<Sysname> display interface loopback brief down
Brief information on interfaces in route mode:
Link: ADM - administratively down; Stby - standby
Interface Link Cause
Loop1 ADM Administratively
|
Field |
Description |
|
Brief information on interfaces in route mode: |
Brief information about loopback interfaces. |
|
Link: ADM - administratively down; Stby - standby |
Explains the Link field values: · ADM—The interface has been shut down by the network administrator. To recover its physical layer state, run the undo shutdown command. · Stby—The interface is a standby interface. To view the primary interface information, run the display interface-backup state command. |
|
Protocol: (s) - spoofing |
Explains the Protocol field value. (s) represents spoofing. If the data link layer protocol of an interface is up, but its link is an on-demand link or is not present, the Protocol field displays UP(s). This attribute is typical of interface Null 0, Inloopback 0, and loopback interfaces. |
|
Interface |
Interface name. |
|
Link |
Physical layer state of the interface: · UP—The interface is up. · DOWN—The interface is physically down. · ADM—The interface has been administratively shut down. To recover its physical state, run the undo shutdown command. · Stby—The interface is a standby interface. |
|
Protocol |
Data link layer protocol state of the interface. |
|
Description |
Interface description configured by using the description command. If the description keyword is not specified in the display interface brief command, the Description field allows a maximum of 27 characters. If the description keyword is specified in the display interface brief command, the field displays the complete interface description. |
|
Cause |
Cause of the interface down event. If the interface has been shut down by using the shutdown command, this field displays Administratively. To restore the physical state of the interface, execute the undo shutdown command. |
Related commands
· interface loopback
· reset counters interface loopback
display interface null
Use display interface null to display information about the null interface.
Syntax
display interface [ null [ 0 ] ] [ brief [ description | down ] ]
Views
Any view
Predefined user roles
network-admin
network-operator
Parameters
0: Specifies interface Null 0.
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 27 characters of interface descriptions.
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 the null keyword is not specified, the command displays information about all interfaces of the device.
If the null keyword is specified but the 0 keyword is not specified, the command displays information about interface Null 0. This is because the device has only one null interface Null 0.
Examples
# Display detailed information about interface Null 0. (Suppose the null interface supports traffic statistics collection.)
<Sysname> display interface null 0
NULL0
Current state: UP
Line protocol state: UP(spoofing)
Description: NULL0 Interface
Bandwidth: 1000000kbps
Maximum transmit unit: 1500
Internet protocol processing: Disabled
Physical: NULL DEV
Last clearing of counters: Never
Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Last 300 seconds output rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec
Input: 0 packets, 0 bytes, 0 drops
Output: 0 packets, 0 bytes, 0 drops
# Display detailed information about interface Null 0. (Suppose the null interface does not support traffic statistics collection.)
<Sysname> display interface null 0
NULL0
Current state: UP
Line protocol state: UP(spoofing)
Description: NULL0 Interface
Maximum transmit unit: 1500
Internet protocol processing: Disabled
Physical: NULL DEV
Last clearing of counters: Never
# Display brief information about interface Null 0.
<Sysname> display interface null 0 brief
Brief information on interfaces in route mode:
Link: ADM - administratively down; Stby - standby
Protocol: (s) - spoofing
Interface Link Protocol Primary IP Description
For the command output, see Table 9 and Table 10.
Related commands
· interface null
· reset counters interface null
interface loopback
Use interface loopback to create a loopback interface and enter loopback interface view.
Use undo interface loopback to remove a loopback interface.
Syntax
interface loopback interface-number
undo interface loopback interface-number
Default
No loopback interface exists.
Views
System view
Predefined user roles
network-admin
Parameters
interface-number: Specifies a loopback interface by its number. The value is 0.
Usage guidelines
The physical layer state and link layer protocols of a loopback interface are always up unless the loopback interface is manually shut down. You can use a loopback interface to achieve the following purposes:
· Prevent the connection from being affected by the physical state of the interface.
· Improve the reliability of the connection.
Examples
# Create interface loopback 0.
<Sysname> system-view
[Sysname] interface loopback 0
interface null
Use interface null to enter null interface view.
Syntax
interface null 0
Default
A device has only one null interface (Null 0), which cannot be created or deleted.
Views
System view
Predefined user roles
network-admin
Parameters
0: Specifies interface Null 0. The null interface number is always 0.
Examples
# Enter Null 0 interface view.
<Sysname> system-view
[Sysname] interface null 0
reset counters interface loopback
Use reset counters interface loopback to clear the statistics on the specified or all loopback interfaces.
Syntax
reset counters interface loopback [ interface-number ]
Views
User view
Predefined user roles
network-admin
Parameters
interface-number: Specifies a loopback interface by its number, which can be the number of any existing loopback interface. If you do not specify the interface-number argument, the command clears the statistics on all loopback interfaces.
Usage guidelines
To determine whether a loopback interface works correctly within a period by collecting the traffic statistics within that period, first use the reset counters interface [ loopback [ interface-number ] ] command to clear the statistics. Then have the interface automatically collect the statistics.
This command is available only if a minimum of one loopback interface has been created.
Examples
# Clear the statistics on loopback interface Loopback 0.
<Sysname> reset counters interface loopback 0
Related commands
display interface loopback
reset counters interface null
Use reset counters interface null to clear the statistics on the null interface.
Syntax
reset counters interface [ null [ 0 ] ]
Views
User view
Predefined user roles
network-admin
Parameters
0: Specifies the number of the null interface, which is always 0.
Usage guidelines
To determine whether the null interface works correctly within a period by collecting the traffic statistics within that period, first use the reset counters interface [ null [ 0 ] ] command to clear the statistics. Then have the interface automatically collect the statistics.
Examples
# Clear the statistics on interface Null 0.
<Sysname> reset counters interface null 0
Related commands
display interface null
shutdown
Use shutdown to shut down a loopback interface.
Use undo shutdown to bring up a loopback interface.
Syntax
shutdown
undo shutdown
Default
A loopback interface is up.
Views
Loopback interface view
Predefined user roles
network-admin
Usage guidelines
Use the shutdown command with caution, because the command disconnects the connection of the interface and disables the interface from communicating.
Examples
# Shut down interface loopback 0.
<Sysname> system-view
[Sysname] interface loopback 0
[Sysname-LoopBack0] shutdown
bandwidth,5
bandwidth,38
dampening,5
default,7
default,38
description,39
description,8
display counters,8
display counters rate,10
display ethernet statistics,11
display interface,14
display interface inloopback,40
display interface loopback,42
display interface null,45
display interface range,1
display packet-drop,24
duplex,26
flow-control,26
flow-control receive enable,27
flow-interval,28
interface,29
interface loopback,47
interface null,47
interface range,1
interface range name,3
jumboframe enable,29
loopback,30
mac-address,35
mtu,36
port link-mode,31
reset counters interface,32
reset counters interface loopback,48
reset counters interface null,48
reset ethernet statistics,32
reset packet-drop interface,33
shutdown,49
shutdown,33
speed,34
