Cisco ASR 900 Series Configuration Guide

two ADMs fails, the other ring still can guarantee the continuation of data flow. SNCP, like the one-plus-one
scheme, has fast failure recovery.
SNCP Path Protection is supported at VC level and STM level.
Once a signal fail condition or a signal degrade condition is detected, the hardware initiates an interrupt to
software that switches from the working path to the protection path. Non-revertive options are valid for SNCP
path protection.
1X OC-192 and 8X OC-48 interface modules only supports the non-revertive option. The non-revertive
option is the default mode.
Note
The following table shows the scales of SNCP supported on different modes:
Supported ScalesModes
252AU4-VC12
336AU4-VC11
16AU4-VC4
252AU3-VC12
336AU3-VC11
4VC4-4c
1VC4-16c
Configuring SNCP
Protection Group Controller Configuration
enable
configure terminal
protection group 1 type vc4-16c
controller protection group 1
type vc4-16c
cem-group 16001 cep
end
Working Path Configuration
enable
configure terminal
controller sdh 0/3/6
au-4 1-16 mode vc4-16c
protection group 1 working
end
Protect Path Configuration
enable
configure terminal
controller sdh 0/12/6
1-Port OC-192 or 8-Port Low Rate CEM Interface Module Configuration Guide, Cisco IOS XE Everest 16.7.x
(Cisco ASR 900 Series)
126
Configuring SNCP on 1-Port OC192/STM-64 or 8-Port OC3/12/48/STM-1/-4/-16 Module
Configuring SNCP

Cisco ASR 900 Series Specifications

General

Brand	Cisco
Model	ASR 900 Series
Category	Network Router
Language	English