Distributed VPN Handling of Cluster Events

Node failure

For all active sessions on this failed node, the backup sessions (on another node) become active, and backup sessions are reallocated on another node.

Inactivate a cluster node

For all active sessions on the cluster node being inactivated, backup sessions (on another node) become active and reallocate backup sessions on another node according to the backup strategy.

Cluster node join

If the VPN cluster mode on the new node is not set to distributed, the control node will request a mode change.

After the VPN mode is compatible, the cluster node will be assigned active and backup sessions in the flow of normal operations.