Method and system for disaster recovery network

The present invention provides a method for disaster recovery and network systems. Involved in IP communications; solve an issue that causes paralysis of the global network of distribution when the SIP proxy device failure. The method comprising: at the first SIP proxy distribution apparatus can not process the received service request, the service request will be transferred to the second SIP proxy distribution apparatus, distributing the first SIP proxy device and the second SIP proxy distribution It means mutually normal spare backup device; the second service request handover SIP proxy distribution means for processing the first SIP proxy distribution apparatus. The present invention provides a technical solution applies to SIP network, to achieve a flexible and reliable backup mechanism.