Cisco Cisco ASR 5000
Channelized Port Configuration Mode Commands
▀ loopback
▄ Command Line Interface Reference, StarOS Release 18
2206
loopback
Configures the type of loopback mode used for diagnostic testing.
Product
SGSN
Privilege
Security Administrator, Administrator
Syntax
loopback { ds1-e1-diag | ds1-e1-line | none | sonet-sdh-diag | sonet-sdh-line }
ds1-e1-diag
Enables a system generated diagnostic lookback signal at the DS1/E1 layer.
ds1-e1-line
Loops back a network diagnostic signal at the DS1/E1 layer.
none
Stops diagnostic loopback signaling.
sonet-sdh-diag
Enables a system generated diagnostic lookback signal at the SONET/SDH layer.
sonet-sdh-line
Loops back a network diagnostic signal at the SONET/SDH layer.
Usage
Setup diagnostic loopback signals for troubleshooting purposes.
Example
loopback ds1-e1-diag