Technique for nondisruptively recovering from a processor...

Details Technique for nondisruptively recovering from a processor... Technique for nondisruptively recovering from a processor...

2008-01-29

2008-01-29

Harper, Kevin C. (Department: 2616)

Multiplex communications

Fault recovery

C714S002000

Reexamination Certificate

active

07324438

ABSTRACT:
A technique non-disruptively recovers from a processor failure in a multi-processor flow device, such as an intermediate network node of a computer network. Data relating to a particular data flow of a processor within the node is tagged with specific information used to detect and recover from a failure of the processor without affecting data from other processors of the node. A data path management device tags the data with the specific information reflecting the processor issuing the data and a state of the processor. When the tagged data subsequently passes through the data path management device, the specific information is compared with current information for the issuing processor. If the comparison indicates that the specific information is valid, the data path management device forwards the related data flow through the node. If the comparison indicates that the specific information is invalid, the data and its related data flow are discarded and “cleanly” purged from the node.

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