ADTRAN AOS Version R10.1.0 Command Reference Manual page 1532

Command Reference Guide
loopback local
Use the loopback local command to enable a local loopback of the interface (towards the router). Use the
no form of this command to disable the loopback. Variations of this command include:
loopback local all
loopback local b1
loopback local b2
loopback local both
Syntax Description
all
b1
b2
both
Default Values
No default values are necessary for this command.
Command History
Release 11.1
Usage Examples
The following example enables a B2 loopback of the basic rate interface (BRI) 1/2 interface:
(config)#interface bri 1/2
(config-bri 1/2)#loopback local b2
60000CRG0-35E
Loops the entire interface back towards the router (including the
D-channel). With an active loopback active all, the established D-channel
between the integrated services digital network (ISDN) module and the
central office switch drops.
Loops the data on B1 back towards the router. A B1 loopback does not
disrupt D-channel signaling.
Loops the data on B2 back towards the router. A B2 loopback does not
disrupt D-channel signaling.
Loops the data on B1 and B2 back towards the router, but does not disrupt
D-channel signaling.
Command was introduced.
Copyright © 2012 ADTRAN, Inc.
BRI Interface Command Set
1532