Network communication fails during live network plugin migration for nodes where openshift-sdn had a custom vxlan port

Solution Unverified - Updated -

Issue

  • During a live network plugin migration (either from OpenShift SDN to OVN-Kubernetes or during a rollback), communication is not possible between migrated and non-migrated nodes.
  • OpenShift SDN has a custom VXLAN port.

Environment

  • Red Hat OpenShift Container Platform
    • 4.16

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