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Cisco Bug: CSCvu32350 - ORR 6PE: optimal route reflection configure under non-default vrf is not blocked

Last Modified

Sep 28, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

7.3.1.BASE

Description (partial)

Symptom:
BGP might crash continuously when bring up CE neighbors.

Conditions:
The following conditions are all needed to true to see the bgp crash:

1. addpath route-policy has backup install configured
   route-policy addpath
     set path-selection backup install
     set path-selection all advertise
  !
2. addpath policy need to be used under address-family vpnv4 unicast and/or vrf address-family ipv4|ipv6 unicast.
  router bgp xxxx
    address-family vpnv4 unicast
      additional-paths selection route-policy addpath
    !
   vrf foo
     rd 1:1
     address-family ipv4 unicast
      additional-paths selection route-policy add-path-to-ibgp
    !
  !

3. optimal-route-reflect group configured under non-default vrf
    router bgp xxxx
      vrf foo
        address-family ipv4 unicast
            optimal-route-reflection orr-grp-1 1.1.1.1
        !
       !
     !

4. Remote PE has the same rd for vrf foo.
 
 Then bgp will crash when bring up the CE neighbor if the same route is received from CE and from remote PE.
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