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Cisco Bug: CSCvu92676 - TI-LFA OR uloop not becoming operational in certain platform when we programme SRTE auto tunnel path

Last Modified

Oct 01, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

Forwarding is broken when OSPF programmed a path via SRTE auto paths for TI-LFA protection or Microloop Avoidance on certain platform (e.g. NCS55xx, NCS5xx, 8xxx, etc.) that do not support them.

This results in TI-LFA and Microloop Avoidance not to work and may cause other issues in the platform forwarding layer.

Issue is specific to platforms like NCS5xxx, NCS5xx and 8xxx when OSPF is enabled with Segment Routing and TI-LFA or Microloop Avoidance features are enabled.
For this scenario to occur, the number of labels required for the TI-LFA/Microloop Avoidance path need to be greater than supported for label stack usage directly that requires use of SRTE auto paths instead.
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Bug Details Include

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