Command Reference Guide

3Com Router 5000 Family and Router 6000 Family interface loopback ● 227
Command Reference
interface loopback
Purpose Use the interface loopback command to create a loopback interface or its view.
Use the undo interface loopback command to delete the specified loopback
interface.
Syntax interface loopback number
undo interface loopback number
Parameters number
Number of the loopback interface. Valid values are 0 to
65535.
Example Create loopback interface 5.
[3Com ] interface loopback 5
[3Com -LoopBack5]
View This command can be used in the following views:
■ System view
Description After created, the loopback interface keeps up until it is shutdown. As it has the
loopback feature, it is often used to improve reliability.
You can shut down a loopback interface using the shutdown command. When you
do this, “Line protocol current state :UP (spoofing)” is displayed describing the
current state of the link layer protocol on the interface.
Related Command display interface loopback