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Field
Protocol
Description
Cause
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 ] ]
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.
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.
<Sysname> display interface null 0
NULL0
Current state: UP
Description
Data link layer protocol state of the interface.
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 of the interface down event. If the interface has been shut down
by
using
the
shutdown
Administratively. To restore the physical state of the interface,
execute the undo shutdown command.
47
command,
this
field
displays
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