Cisco NCS 4200 Series Configuration Manual page 26

Configuring SDH Path Parameters
Path Loopback
Sets a loopback to test the SDH port.
• local — Loops the signal from Tx to Rx path. Sends alarm indication signal (AIS) to network.
• network — Loops the signal from Rx to Tx path.
Configuring Path Loopback
To configure path loopback:
enable
configure terminal
controller sdh 0/0/16
au-4 1
loopback [local | network]
end
To restore the system to its default condition, use the no form of the command.
Note
Configuring Path BERT
For more information on BERT configuration, see
Verifying Path Parameters Configuration
Use show running-configuration command to verify path parameters configuration.
#show running-configuration
controller MediaType 0/0/16
mode sdh
controller SDH 0/0/16
rate STM16
no ais-shut
alarm-report all
clock source internal
overhead s1s0 0
aug mapping au-4
au-4 1
mode vc4
clock source internal
loopback local
overhead c2 10
threshold b3-ber_sd 7
threshold b3-ber_sf 7
overhead j1 tx message STRING
overhead j1 expected message STRING
threshold b3-tca 5
au-4 2
1 port OC-48/ 4 port OC-12/OC-3 + 12 port T1/E1 + 4 port T3/E3 CEM Interface Module Configuration Guide, Cisco
IOS XE Fuji 16.7.x (Cisco NCS 4200 Series)
26
Configuring BERT in SDH for SAToP, on page 27
Configuring SDH
section.