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  1. Fast Datapath Product
  2. FDP-2739

Upstream: [BGP] dynamic-routing - only learn routes that thave rtm_protocol > RTPROT_STATIC

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: Undefined Undefined
    • None
    • None
    • ovn25.03
    • None
    • 5
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      Please mark each item below with ( / ) if completed or ( x ) if incomplete:

      ( ) Integration test case are written and pass successfully

      ( ) The upstream pull request is merged upstream and pass CI

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      Please mark each item below with ( / ) if completed or ( x ) if incomplete: ( ) Integration test case are written and pass successfully ( ) The upstream pull request is merged upstream and pass CI
    • rhel-9
    • None
    • rhel-net-ovn
    • OVN FDP Sprint 13
    • 1

      This is tracking the upstream effort needed to deliver the feature request described below.

      What's the bug?

      When a logical router is configured to learn dynamic routes (LR.options:dynamic-routing=true) it currently learns all the non-OVN routes that are present in the VRF table it monitors.

      It's actually problematic if routes in the VRF are a combination of:

      • ovn installed routes
      • FRR (BGP/OSPF/etc) installed dynamic routes (these have rtm_protocol > RTPROT_STATIC)
      • user configured static routes

      OVN(-controller) will also learn the latter as static routes.  Arguably this is a bug because the OVN feature is about "dynamic-routing".  Moreover, if a user shares the VRF with OVN and wishes OVN to use the static routes it could just explicitly configure them in the NB database as Logical_Router_Static_Route records.

      ovn-controller should filter routes it learns and only learn those that were externally learned (likely through a dynamic routing protocol) and are marked as such in the VRF table (rtm_protocol > RTPROT_STATIC)

      Why is it needed?

      To enable the CMS (ovn-kubernetes) to share the VRF OVN monitors and updates when dynamic routing is configured.

      Who will benefit? 

      ovn-kubernetes transitioning to use OVN's native BGP support.  Potentially neutron-ovn too.

              amusil@redhat.com Ales Musil
              nstbot NST Bot
              OVN QE OVN QE (Inactive)
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                Created:
                Updated: