Refresh interval independent fast reroute facility protection tear down messaging
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United States of America Patent
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Mar 7, 2017
Issued Date -
N/A
app pub date -
Dec 30, 2014
filing date -
Oct 27, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In one example, techniques of this disclosure may enable a point of local repair (PLR) network device to signal availability of link protection or node protection to a merge point (MP) network device and enable a network device to actively determine whether or not it is a merge point router. Based on whether or not the network device determines it is a MP, the network device may selectively clean up LSP states when there is an upstream link or node failure. The RSVP-TE protocol may be extended to enable a network device to send a tear down message to a downstream router, which may enable the downstream router to conditionally delete locale LSP state information. In some instances, a PLR network device may directly send a tear down message to a MP network device even though the PLR network device may not have a working bypass LSP.
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