State synchronization

PPPoE sessions are synchronized between the redundant BNG nodes. The subscriber synchronization is achieved through Multi-Chassis Synchronization (MCS) protocol in a similar way it is performed for IPoE.

multi-chassis
            peer <IP@>create
                sync
                    local-dhcp-server
                    SRRP
                    sub-mgmt [ipoe | pppoe] 
                 :
:
                    no shutdown
                exit
                no shutdown
            exit 

Two keywords, ipoe and pppoe enable a more granular control over which type of subscribers the MCS should be enabled.

Subscriber synchronization is important for following reasons: