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Cisco Bug: CSCvv54693 - Segment routing: route not properly installed on FIB when switch is reloaded

Last Modified

Sep 25, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

9.3(5)

Description (partial)

Symptom:
Network topology configured with MPLS+segment-routing has FIB routes pointing to Null0 interface:

192.0.2.0/24 -- PE router -- P router -- PE router 

output from P router:

P-router# show forwarding 10.4.99.0/24 vrf commercial 

slot  1
=======


IPv4 routes for table commercial/base

------------------+-----------------------------------------+----------------------+-----------------+-----------------
Prefix            | Next-hop                                | Interface            | Labels          | Partial Install 
------------------+-----------------------------------------+----------------------+-----------------+-----------------
*192.0.2.0/24        0.0.0.0                                   Null0


Due to this, traffic is blackholed

Conditions:
1. Seen on 93180YC-FX switches.
2. Switch is reloaded.
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  • Status
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