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Field
Link
Protocol
Primary IP
Description
display interface loopback
Use display interface loopback to display information about the specified or all existing loopback
interfaces.
Syntax
display interface [ loopback ] [ brief [ down ] ]
display interface [ loopback [ interface-number ] ] [ brief [ description ] ]
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.
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.
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
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.
<Sysname> display interface loopback 0
Description
Physical layer state of the interface, which is always UP, meaning that
the link is physically up.
Data link layer protocol state of the interface, which is always UP(s).
IP address of the interface.
Because inloopback interfaces do not support CLI configuration, this
field does not display a value.
Interface description configured by using the description command.
Because inloopback interfaces do not support CLI configuration, this
field does not display a value.
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