Guest

Preview Tool

Cisco Bug: CSCvs55753 - ACI Leaf Missing MP-BGP Route Reflector bgpPeer MOs

Last Modified

Aug 27, 2020

Products (1)

  • Cisco Application Policy Infrastructure Controller (APIC)

Known Affected Releases

3.2(5d)

Description (partial)

Symptom:
A Cisco ACI leaf switch does not have MP-BGP route reflector peers in the output of "show bgp session vrf overlay-1". As a result, the switch is not able to install dynamic routes that are normally advertised by MP-BGP route reflectors. However, the spine switch route reflectors are configured in the affected leaf switch's pod, and pod policies have been correctly defined to deploy the route reflectors to the leaf switch.

    leaf# show bgp session vrf overlay-1
    Total peers 0, established peers 0
    ASN 65001
    VRF overlay-1, local ASN 65001
    peers 0, established peers 0, local router-id X.X.X.X
    State: I-Idle, A-Active, O-Open, E-Established, C-Closing, S-Shutdown

    Neighbor        ASN    Flaps LastUpDn|LastRead|LastWrit St Port(L/R)  Notif(S/R)

Additionally, the bgpPeer Managed Objects (MO) are missing from the leaf's local MIT. In the below output, we expect to see an object with the name "peer-[10.0.X.X/32]" for each route reflector in the pod. 

    leaf# cd /mit/sys/bgp/inst/dom-overlay-1/
    leaf# ls -lah
    total 4.0K
    drw-rw---- 1 admin admin 512 Dec 10 10:00 .
    drw-rw---- 1 admin admin 512 Dec 10 10:00 ..
    drw-rw---- 1 admin admin 512 Dec 10 10:00 af-ipv4-ucast
    drw-rw---- 1 admin admin 512 Dec 10 10:00 af-rtfilter-ucast
    drw-rw---- 1 admin admin 512 Dec 10 10:00 af-vpnv4-ucast
    drw-rw---- 1 admin admin 512 Dec 10 10:00 af-vpnv6-ucast
    drw-rw---- 1 admin admin 512 Dec 10 10:00 db-dtep
    drw-rw---- 1 admin admin 512 Dec 10 10:00 gr
    -r--r----- 1 admin admin   0 Dec 10 10:00 summary
    *** MISSING PEER OBJECTS ***

Conditions:
+ ACI route reflectors have been configured in the same pod as the leaf
+ Pod policies have been configured properly
+ bgpPeer MO is missing from the leaf and "show bgp session vrf overlay-1" shows no peer entries
+ APIC cluster is healthy and all controllers are "Fully-fit"
+ Attempts to clean reload the leaf do not allow the bgpPeer object to deploy onto the leaf
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.