Pods connected to an additional OVS bridge through localnet may get abruptly disconnected from the network.

If kubernetes-nmstate pod for any reason restarts, it may reapply all the NNCPs. This would lead to removal of all patch ports connected to configured OVS bridge that were not defined in the NNCP. This means that all Pods and VMs connected to it would be disconnected.

This can be avoided by setting "allow-extra-patch-ports: true" in the NNCP.

4.14+

Docs

    1. Go to https://docs.openshift.com/container-platform/4.16/networking/multiple_networks/configuring-additional-network.html#configuring-additional-network_configuration-additional-network-interface
    2. See "Example mapping for nodes with multiple interfaces"
    3.
    

...
      state: up
      bridge:
        options:
          stp: true
        port:
        - name: eth1 
...

...
      state: up
      bridge:
        allow-extra-patch-ports: true
        options:
          stp: true
        port:
        - name: eth1 
...

https://bugzilla.redhat.com/show_bug.cgi?id=2209293