Patent attributes
The present invention relates to a method and system for implementing protocol redundancy in a router. In particular, the invention relates to providing redundancy of multi protocol label switching (MPLS). In one aspect, the present invention provides MPLS redundancy wherein all protocol states are mirrored. An active processor provides MPLS operations. In the present invention, a standby processor is coupled to the active processor. During the initial synchronization, all protocol information from the active processor is forwarded to the standby processor. The protocol information can include event information and state information. Thereafter, any updates of protocol information are immediately forwarded to the standby processor in an orderly and controlled manner. Upon failure of the active processor, the standby processor takes over as the active processor. All MPLS protocol operations are performed on the new active processor.
