- apiVersion: k8s.ovn.org/v1
  kind: UserDefinedNetwork
  metadata:
    creationTimestamp: "2025-10-09T12:18:03Z"
    finalizers:
    - k8s.ovn.org/user-defined-network-protection
    generation: 1
    name: gryffindor
    namespace: e2e-endpointslices-mirror-e2e-default-3164
    resourceVersion: "1130969"
    uid: e5dcf3f0-b7b1-429b-9bfc-da410921f656
  spec:
    layer2:
      role: Secondary
      subnets:
      - 203.203.0.0/16
    topology: Layer2
  status:
    conditions:
    - lastTransitionTime: "2025-10-09T12:18:03Z"
      message: 'failed to generate NetworkAttachmentDefinition: failed to render CNI
        network config: invalid subnet configuration: pod or join subnet overlaps
        with already configured internal subnets: illegal network configuration: user
        defined join subnet "100.65.0.0/16" overlaps built-in join subnet "100.65.0.0/16"'
      reason: SyncError
      status: "False"
      type: NetworkCreated 

[sig-network][OCPFeatureGate:NetworkSegmentation][Feature:UserDefinedPrimaryNetworks] EndpointSlices mirroring when using openshift ovn-kubernetes created using NetworkAttachmentDefinitions mirrors EndpointSlices managed by the default controller for namespaces with user defined primary networks L3 primary UDN, cluster-networked pods [Suite:openshift/conformance/parallel]