Patent ID: 7535827
Filing Date: 2009-05-19
Classification: G06F,H04L

Abstract:
1. In a node of a telecommunications network, which node comprises redundant routing processor modules, each redundant routing processor module including a primary control processor, a run time control processor, a message processor and a distributed layer processor, one module being an active module and the other an inactive module, a method of maintaining the inactive module in hot standby mode with the active module, comprising steps of: coordinating operations of the run time control processors, the message processors, and the distributed layer processors, with the primary control processors, allocating resources between the message processors and the distributed layer processors with the runtime control processors, sending from the message processor of the active module to the distributed layer processor of the inactive module only a status affecting message which affects the status of a connection being held by the active module by filtering out all signaling messages, and updating only a state machine and routing table in the distributed layer processor of the inactive module in response to the status affecting message so that the inactive module is maintained in hot standby with the active module.