System and method for detecting link failures
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United States of America Patent
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Jul 19, 2011
Grant Date -
Nov 10, 2005
app pub date -
May 10, 2004
filing date -
May 10, 2004
priority date (Note) -
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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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