Hardware manual

loopback line
Interface Commands IR-145
Examples
The following example configures the loopback test on the DCE device:
interface serial 1
loopback line
The following example shows how to configure a payload loopback on a Cisco 2524 or 2525 router:
Router1(config-if)#loopback line payload
Loopback in progress
Router1(config-if)#no loopback line
The following example shows the output on a Cisco 2524 or 2525 router when you loop a packet in
switched mode without an active connection:
Router1(config-if)#service-module 56k network-type switched
Router1(config-if)#loopback line payload
Need active connection for this type of loopback
% Service module configuration command failed: WRONG FORMAT.
Related Commands
You can use the master indexes or search online to find documentation of related commands.
show interfaces loopback