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  1. OpenShift Virtualization
  2. CNV-60575

IPv6 does not work properly on dual-stack clusters with layer primary UDN

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      Description of problem:

      In 4.18, UDN integration was released with several bugs related to IPv6. TCP sessions were broken on live-migration OCPBUGS-55263, distant GW routers advertised themselves to workload CORENET-5562, GW was not updated after live-migration CORENET-5328. These issues were grouped under CORENET-5649 and resolved in 4.19.0. What is missing is final verification within CNV and test automation for IPv6 on dual-stack clusters.

      Version-Release number of selected component (if applicable):

      4.18

      How reproducible:

      Always

      Steps to Reproduce:

      1. See CORENET-5328, CORENET-5328, and CORENET-5328

      Actual results:

      East/west IPv6 TCP sessions are broken after LM
Guests are configured with a GW belonging to the old node after LM
Guests end up with many IPv6 GWs set

      Expected results:

      Sessions stay open
Only a single GW, pointing to the closest router

      Additional info:

      We should also extend our UDN test automation to test IPv6 connectivity

        1. 04-service.yaml
          0.2 kB
        2. 03-vm.yaml
          1 kB
        3. 02-udn.yaml
          0.3 kB
        4. 01-namespace.yaml
          0.1 kB

              phoracek@redhat.com Petr Horacek
              phoracek@redhat.com Petr Horacek
              Yossi Segev Yossi Segev
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                Created:
                Updated:
                Resolved: