ROUTER AND ROUTING PROTOCOL REDUNDANCY

摘要

A router and routing protocol redundancy are disclosed to reduce service outage or degradation for a network device and thus to increase service avaibility on a network due to software and hardware failures of the network device. A network device such as router includes a redundancy platform havin g an active controller system and a standby controller system. A routing protocol state change is received or generated by the active controller system. The received or generated routing protocol state change is replicate d to the standby controller system. By replicating the routing protocol state change, the standby controller system can maintain the routing protocol sessions for the network device if a failure occurs in the active controller system. Furthermore, the routing protocol states are maintained in realtime to handle the dynamic changes created by routing protocols.