To enable the master device to back up IGMP snooping entries to the backup device in a master/backup E-Trunk scenario, configure dual-device IGMP snooping hot backup. After dual-device IGMP snooping hot backup is configured, multicast services are not interrupted during a master/backup E-Trunk switchover.
ARP dual-device hot backup is configured. The E-Trunk protocol is configured. Dual-homing PEs on the access side are configured to work in active-active mode.
This section describes how to enable dual-device ND hot backup to back up ND entries between devices. This allows fast service switching if a network node or link fails, enhancing service reliability.
This section describes how to configure whitelist session-CAR for dual-device backup to isolate bandwidth resources per session for active/standby protocol packets.