Command Reference Guide

244 ● loopback 3Com Router 5000 Family and Router 6000 Family
Command Reference
loopback
Purpose Use the loopback command to set the loopback function on an ATM OC-3c/STM-1
interface.
Use the undo loopback command to cancel the loopback function.
Syntax loopback { cell | local | remote }
undo loopback
Parameters cell
Enables ATM interface cells local loop.
local
Enables ATM interface local loop.
remote
Enables ATM interface remote loopback.
Default By default, loop back is forbidden.
Example Enable local loopback on the ATM interface.
[3Com -Atm4/0/0] loopback local
View This command can be used in the following views:
■ ATM Interface view
Description Set the interface configuration to local loop or loopback when testing some special
functions. Disable loopback in normal cases.