ICB spoke SDPs are supported for use with Cpipe services in an MC-LCR configuration. ICB improves switch times, provides additional protection in case of network failures, and reduces packet loss when an active endpoint is switched from a failed MC-LCR node to the protection node.
If the active link on the access side fails, an MC-LCR switchover is triggered and a pseudowire switchover is subsequently triggered. A failure on the network side triggers a pseudowire switchover but not an MC-LCR switchover. For detailed information on pseudowire redundancy with ICB protection, refer to the 7705 SAR Services Guide, ‟PW Redundancy and Inter-Chassis Backup”.