Cisco Bug: CSCsg34803 - Wrong ERO - TE passing incorrect addr for Backup tunnel dest to RSVP
Jan 08, 2017
- Cisco Carrier Routing System
Known Affected Releases
None Symptom: When a node running IOS XR is a point of local repair (PLR) for MPLS Fast Reroute (FRR), the merge point address may be set incorrectly for some primary tunnels when both link protection and node protection backup tunnels are present. Note that if IOS XR is a merge point node, this behaviour does not cause any harm but it may be possible that some third party node rejects the path change admission after FRR is triggered resulting in FRR active tunnels to go down. Conditions: IOS XR PLR assigns the node protection backup over link protection backup to all primary tunnels and hence this issue is not seen unless FRR bandwidth protection is enabled where node protection backup tunnel can not admit all the primary tunnels and hence some primary tunnels use node protection backup and some primary tunnels use link protection backup. When primary tunnels reoptimizes after an FRR event, backup merge point address may get corrupted in above case.
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Bug Details Include
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