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Cisco Bug: CSCur88455 - 7600 IP FRR: MPLStoMPLS traffic Blackhole after VRF Configuration

Last Modified

Feb 15, 2018

Products (1)

  • Cisco 7600 Series Routers

Known Affected Releases

15.2(2)S 15.2(4)S 15.2(4)S6 15.4(3)S1.1

Description (partial)

7600 router is dropping transient TAGtoTAG switched traffic in one direction right
after new VRF is configured. Control-Plane from and to router is not affected -> Blackhole.
Seen only with IP FRR (OSPF LFA), susceptibility to issue is developed by flaps of
IP FRR primary path's interface & history of VRF configuration / un-configuration.

Remote LFA / IP FRR.
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