IGMP and MLD Snooping Behavior on MCT Cluster Devices
- Local information is synchronized to the MCT peer device using CCP. The information includes mcache and FDB entry (on arrival of data traffic), joins and leaves, dynamic router ports, and PIM-SM snooping joins and prunes.
- Native control packets (joins and leaves) that are received are processed by protocol code and are forwarded if necessary.
- All control and data traffic is received on the ICL. The traffic is forwarded out of a CCEP only if the remote CCEP is down; otherwise, it is dropped by the egress filters on the CCEP.
- The ICL is added as an outgoing interface (OIF) by default whenever the CCEP is a source or a receiver. This provides faster convergence during MCT failover.
- For IGMP and MLD joins or leaves:
- Static groups and static router ports configured on a CCEP are not synced across to the MCT peer. For these features to work correctly, they must be manually configured on the respective CCEPs of both the cluster nodes.