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Cisco Bug: CSCvu79655 - SRTE explicit paths pick up non-protected Adj SIDs instead of protected ones

Last Modified

Sep 02, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

6.6.3.BASE

Description (partial)

Symptom:
When SRTE explicit paths are configured with links IP addresses, head-end routers make the paths with non-protected Adj SIDs while protected ones should be used for fast-reroute.

Conditions:
It is observed in SRTE topology that routers running with XR 6.6.3 advertise its Adj SIDs of a link in the order: "unprotected" first, "protected" later as below.

Adj SID: 32000 (unprotected) 32011 (protected)

Other XR versions (6.3.3 and 6.4.2) advertise link Adj SIDs in the reversed order: "protected" first, "unprotected" after.

Adj SID: 32009 (protected) 32008 (unprotected)
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