If I modify an exisiting VM to use bridge binding in the default pod network, network connectivity for the VM is broken.

This is because the macAddress of the interface is always persisted, however when using the bridge binding the MAC address has to be assigned by OVN-K.

This works when the VM is created from scratch with bridge binding and no macAddress.

OpenShift 4.20.8
kubevirt-hyperconverged-operator.v4.20.3

Always

1. Create VM using the default pod network and masquerade binding.
2. Try to edit the VM to use bridge binding and remove the macAddress:

oc patch vm my-vm --type=json  -p='[{"op":"remove","path":"/spec/template/spec/domain/devices/interfaces/0"},{"op":"remove","path":"/spec/template/spec/networks/0"}]'

oc patch vm my-vm --type=json  -p='[{"op":"add","path":"/spec/template/spec/domain/devices/interfaces","value":[{"bridge":{},"name":"default"}]},{"op":"add","path":"/spec/template/spec/networks","value":[{"name":"default","pod":{}}]}]'

- A macAddress is always assigned.
- The VM doesn't have network connectivity.

~~~
          interfaces:
            - bridge: {}
              macAddress: '02:3f:76:22:c1:01'
              name: default

      networks:
        - name: default
          pod: {}
~~~

- No macAddress in the VM yaml
- VM has network connectivity