Description of problem:

I don't think this is a bug on a specific component, but more about how things work together: SR-IOV + CNV + Console.

For example, a user does the following:

1. Configure some bridge network, my example is virt-toca network, which is just a bridge using VLAN 2.

apiVersion: k8s.cni.cncf.io/v1
kind: NetworkAttachmentDefinition
metadata:
annotations:
k8s.v1.cni.cncf.io/resourceName: bridge.network.kubevirt.io/virt.toca
name: virt-toca
namespace: homelab
spec:
config: >-
{"name":"virt.toca","type":"cnv-bridge","cniVersion":"0.4.0","bridge":"virt.toca","macspoofchk":false,"ipam":{}}

2. Go to the CNV UI: Virtualization -> Virtual Machines -> example_vm -> Configuration -> Network Interfaces

3. Edit a NIC

4. See you can select a Network (item 2 in the menu), plus a type for that network (item 3 in the menu).

For example, I have a network named virt-toca, which I just configured a bridge NAD which is working fine. But now I want SR-IOV too and the dialog above suggests I can have an Sr-iov network with the same name and just select a different type for the VM NIC (i.e. SR-IOV)

5. Now I configure an sr-iov network with the same name:

apiVersion: v1
items:

• apiVersion: sriovnetwork.openshift.io/v1
  kind: SriovNetwork
  metadata:
  annotations:
  name: virt-toca
  namespace: openshift-sriov-network-operator
  spec:
  networkNamespace: homelab
  resourceName: virt_toca_sriov_resource
  spoofChk: "off"
  trust: "on"
  vlan: 2
  kind: List
  metadata:
  resourceVersion: ""

6. Here it gets confusing. Now in the CNV dialog from step 4 above one would expect to use virt-toca in bridge or sr-iov mode, just by changing the type of the network (item 3 in NIC edit menu) right? No, it does not work like that, and now both networks are broken.

7. The SR-IOV network defined at step 5 overwrote the NAD of the bridge, there is still a single NAD named virt-toca, but its not pointing to the sr-iov resource and not the bridge one.

apiVersion: k8s.cni.cncf.io/v1
kind: NetworkAttachmentDefinition
metadata:
annotations:
k8s.v1.cni.cncf.io/resourceName: openshift.io/virt_toca_sriov_resource
creationTimestamp: '2023-06-13T03:26:51Z'
generation: 2
managedFields:

• apiVersion: k8s.cni.cncf.io/v1
  fieldsType: FieldsV1
  fieldsV1:
  'f:metadata':
  'f:annotations': {}
  'f:spec': {}
  manager: kubectl-client-side-apply
  operation: Update
  time: '2023-06-13T03:26:51Z'
• apiVersion: k8s.cni.cncf.io/v1
  fieldsType: FieldsV1
  fieldsV1:
  'f:metadata':
  'f:annotations':
  'f:k8s.v1.cni.cncf.io/resourceName': {}
  'f:spec':
  'f:config': {}
  manager: sriov-network-operator
  operation: Update
  time: '2023-06-13T03:38:48Z'
  name: virt-toca
  namespace: homelab
  resourceVersion: '966960'
  uid: 9d63f136-10be-45fb-b303-f51949d17efa
  spec:
  config: >-
  { "cniVersion":"0.3.1",
  "name":"virt-toca","type":"sriov","vlan":2,"spoofchk":"off","trust":"on","vlanQoS":0,"ipam":{}
  }

So essentially the sr-iov one overwrote the bridge one, and now its all broken. VMs configured with bridge network will fail to schedule.

Look at this, a VM with bridge network

interfaces:

• bridge: {}
  macAddress: '02:52:59:00:00:02'
  model: virtio
  name: nic-virt-toca

networks:

• multus:
  networkName: virt-toca
  name: nic-virt-toca

Fails to schedule because of a missing sr-iov resource on the node its pinned to (that node does not have SR-IOV card)

message: >-
0/9 nodes are available: 1 Insufficient
openshift.io/virt_toca_sriov_resource,

Things get very very confusing for the user, only to latter notice that the NAD for the bridge was overwritten, and the CNV UI dialog doesn't really make much sense because each network (NAD) can have only one type, so its redundant to ask for both - as it implies it would work.

Would be nice to actually have this work, I don't want a network named vlan-2-bridge that I use with bridge type, and another vlan-2-sriov that I use with sriov type. Having just vlan-2 and then choose the type would be the best user experience.

Version-Release number of selected component (if applicable):
4.13

How reproducible:
Always

Steps to Reproduce:
As above

Actual results:

• Configuring sr-iov breaks bridge
• weird things happen

Expected results:

• Don't overwrite the bridge NAD
• Allow both NAD to co-exist, or merge them instead of overwrite
• If each network can only have a single type, then the UI field for type selection is redundant