1:1 LNS stateful redundancy on aggregated inline service interfaces

You can create an aggregated inline service virtual logical interface that bundles pairs of inline services anchor interfaces across MPCs to provide 1:1 LNS stateful redundancy between the paired members. You can assign a single bundle or one or more pools of bundles per L2TP tunnel group. LNS sessions are subsequently established on the aggregated interface. When an LNS session failover occurs, the secondary link becomes active and all the LNS data traffic destined for the session automatically moves over to the secondary anchor interface on a different MPC. The subscriber session remains up on the virtual logical interface. No traffic statistics are lost. If this redundancy is not configured, subscriber traffic is lost, the keepalives expire, and the PPP client is disconnected. When a card comes back online after a failover, you can move the LNS data traffic from the currently active secondary interface back to the primary interface on the original card You can manually force a switchover from the primary interface to the secondary interface, and you can manually revert to the original interface in this case as well.