Command Reference Guide

3Com Router 5000 Family and Router 6000 Family loopback ● 245
Command Reference
loopback
Purpose Use the loopback command to enable the loopback function on an ATM
OC-3c/STM-1 interface.
Use the undo loopback command to disable the loopback function.
Syntax loopback { cell | local | remote }
undo loopback
Parameters cell
Enables the ATM interface to perform cell loopback.
local
Enables the ATM interface to perform local loopback.
remote
Enables the ATM interface to perform the remote
loopback.
Default By default, loopback function is disabled.
Example Enable the ATM interface to perform local loopback.
[3Com -Atm4/0/0] loopback local
View This command can be used in the following views:
■ ATM Interface view
Description Enable loopback only when performing some special tests.