Method for implementing fast re-routing (FRR)
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United States of America Patent
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Jun 20, 2017
Grant Date -
Jul 30, 2015
app pub date -
Jan 28, 2015
filing date -
Jan 30, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method for providing a protected fast rerouting scheme for traffic conveyed in a network comprising a working path and a first backup path for conveying the traffic in case of a node failure. The method enables conveying traffic when two simultaneous failures occur, a failure of a link and/or of a node, belonging to the working path and the other—a failure occurring at a link and/or a node belonging to the first backup path. Upon detecting occurrence of a link/node failure along the working path, traffic is diverted to the first backup path, and upon detecting a concurrent failure at the downstream link/node at the first backup path, traffic is diverted to a second backup path extending from a node belonging to the first backup path and merges with the working path at a node located downstream of the failure that occurred at the working path.
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