Multiplex communications – Diagnostic testing – Fault detection
Reexamination Certificate
2011-07-19
2011-07-19
Wong, Xavier Szewai (Department: 2462)
Multiplex communications
Diagnostic testing
Fault detection
C370S401000, C714S048000
Reexamination Certificate
active
07983173
ABSTRACT:
A system and method monitors links in a computer network and rapidly detects failures of such links. Network entities disposed at opposite ends of a link are provided with failure detection engines that signal their presence to each other. Thereafter, each failure detection engine ensures that its entity transmits a continuous stream to the other entity by sending either data frames or newly defined failure detection packets. If an interruption in this continuous stream is detected, then the failure detection engine concludes that the link has failed. In response, the failure detection engine preferably notifies other applications or protocols of the failure, and causes the link to be shut-down.
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Cesari and McKenna LLP
Cisco Technology Inc.
Wong Xavier Szewai
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