UP CP | Synchronization Request | |<------- via Ci----------| | | | Synchronization Begin | |-------- via Ci--------->| | | | Board/Interface Report | |-------- via Ci--------->| | | | Synchronization End | |-------- via Ci--------->| | | 1) Synchronization from UP to CP UP CP | Synchronization Request | |-------- via Ci--------->| | | | Synchronization Begin | |<-------- via Ci---------| | | | Synchronizes | |Subscriber Session States| | Network Route Entries | |<------- via Ci----------| | | | Synchronization End | |<-------- via Ci---------| | | 2) Synchronization from CP to UP