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Cisco Bug: CSCvv79054 - Inconsistent route-map with 2 L3outs due to timing issue

Last Modified

Oct 13, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

14.2(4o)

Description (partial)

Symptom:
Due to OSPF "default leak policy" with "Leak default route only" it's expected to have "deny-all" route-map in OSPF process, but another route-map was pushed to OSPF process:
show ip ospf vrf Prod:Internal
 
Routing Process default with ID 10.50.40.185 VRF Prod:Internal
Stateful High Availability enabled
Supports only single TOS(TOS0) routes
Supports opaque LSA
Table-map using route-map exp-ctx-2850816-deny-external-tag
Redistributing External Routes from
   static route-map exp-ctx-st-2850816
   direct route-map exp-ctx-st-2850816
   bgp route-map exp-ctx-proto-2850816
   eigrp route-map exp-ctx-proto-285081

Inconsistency can be observed among different leafs:
One leaf can have "deny-all" policy (expected)
Another leaf can have non "deny-all" - as per example exp-ctx-proto-2850816

Inconsistency can occur after leaf clean reload/software upgrade due to timing issue - which policy will be pushed to leafs first

Conditions:
2 OSPF L3outs for same VRF/same leaf
One L3out contains "default leak policy" with "Leak default route only"
Another L3out has policy that allows redistribution of some prefixes to OSPF
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