HITLESS SWITCHOVER FROM ACTIVE TCP APPLICATION TO STANDBY TCP APPLICATION

摘要

Embodiments of the invention include a method for maintaining an active-standby relationship between an active control card and a standby control card in a network element. The network element receives a data from a remote peer at the active control card. The network element communicates data from the active TCP module to an active application module in the active control card. The network element communicates synchronization data from the active application module to a standby application module on the standby control card. The network element communicates an application synchronization acknowledgement from the standby application module to the active APP module. The network element communicates an application acknowledgment packet from the active application module to the active TCP module responsive to receiving the application synchronization acknowledgment. The network element then communicates an acknowledgement to the remote peer responsive to the application acknowledgement.