Preview Tool

Cisco Bug: CSCvv01496 - Fast-reroute backup paths are not updated in the RIB when ISIS admin distance decreased

Last Modified

Sep 17, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases


Description (partial)

With multiple protocol instances, fast-reroute backup paths are not updated in the RIB when the ISIS admin distance is decreased.

steps to reproduce
1) configure 2 isis instances (isis 1 , isis 3)
2) for an unlabel prefix say p1 , configure 1st instance to allocate label and having TILFA and 2nd instance to deny label
3) configure isis distance such that RIB prefers "isis 2"
4) change admin distance of isis 1 such that isis 1 is preferred by RIB
5) observe RIB is not updated with TILFA backup

ISIS configured for fast-reroute and changing the isis administrative distance configuration.
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.