CONTROL FOR BFD RETURN PATH
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United States of America Patent
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Issued Date -
Aug 16, 2018
app pub date -
Apr 16, 2018
filing date -
Jun 30, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A method is implemented by a network device to establish a bidirectional forwarding detection (BFD) session with a defined return path to enable detection of data plane failures between an active node and a passive node in a network where a forward path and a reverse path between the active node and the passive node are not co-routed. The method includes receiving a label switched path (LSP) ping including a BFD discriminator type length value (TLV) of the active node and a return path TLV describing a return path to the active node. The BFD discriminator of the active node and a BFD discriminator of the passive node are associated with the BFD session. The return path is associated with the BFD session between the active node and the passive node, and BFD control packets are sent to the active node using the return path to detect a failure on the return path.
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