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Cisco Bug: CSCvu82801 - mpls_lsd process crash on standby RP with bgp/mcast route churn

Last Modified

Sep 02, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

7.1.2.BASE

Description (partial)

Symptom:
mpls_lsd process crash on standby RP

Conditions:
- Need to have a protocol (for example BGP) that has both its active and standby instances registered with LSD. For example:

P/0/0/CPU0:PE2#show mpls lsd applications 
Mon Jul  6 10:53:02.568 EDT
Application                  State    RecoveryTime    Location    
---------------------------- -------- --------------- ------------
.
BGP-VPNv4(A):bgp-default     Active   0/0 (600)       0/1/CPU0
.
.
BGP-VPNv4(S):bgp-default     Active   0/0 (600)       0/0/CPU0

- A failover is performed.
- Post failover, the protocol attempts to un-register with LSD (for example due to a "no router bgp xxxx" configuration).
- The LSD process crashes on the standby RP.
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