Fault tolerant recoverable TCP/IP connection router

摘要

A fault tolerant recoverable connection device and methods are disclosed that include a primary router in an active state to provide a connection between clients and servers in a network, and a backup router in a standby state. The states of the primary and backup routers are switched when the primary router fails, the backup router has a better reach-ability state than the primary router, or by an operator command. Each router has a synchronization manager which maintains synchronized tables between the active and standby routers; a monitoring manager which monitors and switch the state of the routers; a reach-ability manager which monitors, updates, and compares the reach-ability set and state of the routers; and a keep alive manager which monitors the routers to provide a status notification to the monitoring manager.