Hitless switchover from the active TCP applications to the standby TCP application

摘要

Embodiments of the present invention includes a method for maintaining an active standby relationship between the active control card and standby control card in the network element . Network element , to receive in the active control card data from a remote peer . Network elements communicates the data from the active TCP module to the active application modules in the active control card . Network elements , to communicate the synchronization data from the active application module to the standby application module on the standby control card . Network elements , to communicate the application synchronization acknowledgment from the standby application module to the active APP module . Network element , in response to receiving a synchronization acknowledgment application , the application communicates acknowledgment packet from the active application module to active TCP module . Network elements , depending on the application acknowledgment communicating an acknowledgment to the remote peer . [ Selection Figure ] Figure 2