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  1. RHEL
  2. RHEL-22303

Zebra not fetching host routes

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: Blocker Blocker
    • rhel-8.10
    • None
    • frr
    • None
    • frr-7.5.1-22.el8
    • ZStream
    • sst_cs_infra_services
    • ssg_core_services

      What were you trying to do that didn't work?

       

      FRR not initiating BGP connection with the external neighbor

      Please provide the package NVR for which bug is seen:

       

      rpm -q frr
      frr-7.5-11.el8_6.5.x86_64

      How reproducible:

      Comes from a customer case. MetalLB bug is https://issues.redhat.com/browse/OCPBUGS-27425

      Steps to reproduce

      1.  
      2.  
      3.  

      Expected results

      Actual results

       

      Zebra prints out:

      2024-01-16T17:04:01.701723737+00:00 stdout F 2024/01/16 17:04:01.701 ZEBRA: rnh_register msg from client bgp: hdr->length=8, type=nexthop vrf=0
2024-01-16T17:04:01.701723737+00:00 stdout F 2024/01/16 17:04:01.701 ZEBRA: 0: Add RNH 10.145.255.254/32 type Nexthop
2024-01-16T17:04:01.701723737+00:00 stdout F 2024/01/16 17:04:01.701 ZEBRA: 0:10.145.255.254/32: Evaluate RNH, type Nexthop (force)
2024-01-16T17:04:01.701723737+00:00 stdout F 2024/01/16 17:04:01.701 ZEBRA: 0:10.145.255.254/32: NH has become unresolved

      The neigh status prints

       

      Connections established 0; dropped 0
Last reset 2d11h45m, Waiting for NHT
External BGP neighbor may be up to 255 hops away.

       

      Also:

       

       Output of - oc -n metallb-system exec -it speaker-xxxxx -c frr -- vtysh -c "show ip bgp 10.145.255.254" 
[core@bastion-spoke ~]$ oc -n metallb-system exec -it speaker-28t57 -c frr -- vtysh -c "show ip bgp 10.145.255.254" 
% Network not in table
 

[core@bastion-spoke ~]$ oc -n metallb-system exec -it speaker-28t57 -c frr -- vtysh -c "show ip nht" 10.145.255.254  
unresolved Client list: bgp(fd 15)

       

       

      When FRR starts, we see the following logs :

       

      2024-01-16T17:46:33.605673760+00:00 stderr F 2024/01/16 17:46:33 ZEBRA: [EC 4043309092] netlink-cmd (NS 0) error: data remnant size 32336
2024-01-16T17:46:33.605673760+00:00 stderr F 2024/01/16 17:46:33 ZEBRA: [EC 4043309092] netlink-cmd (NS 0) error: data remnant size 32768

       

      This looks similar to https://github.com/FRRouting/frr/issues/10404 but it's missing the third line on the issue.

       

      I am attaching the frr logs but attached to the case there's also the sos report in case it's needed.

       

       

      Also, I am attaching the output of frr running-conf too. 

        1. ip_-s_-d_link.gz
          10 kB
        2. frr.log.gz
          2.60 MB
        3. frr.conf
          3 kB

            mruprich@redhat.com Michal Ruprich
            fpaoline@redhat.com Federico Paolinelli
            Michal Ruprich Michal Ruprich
            Frantisek Hrdina Frantisek Hrdina
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              Created:
              Updated: