Command Reference Guide

240 ● loopback 3Com Router 5000 Family and Router 6000 Family
Command Reference
loopback
Purpose Use the loopback command to enable loopback on the Ethernet port for test
purpose.
Use the undo loopback command to disable loopback on the Ethernet port.
Syntax loopback
undo loopback
Parameters None
Default By default, loopback is disabled.
Example Enable loopback on port Ethernet 1/0/1.
[3Com -Ethernet1/0/1] loopback
View This command can be used in the following views:
■ Ethernet Port view
Related Command display interface