reproducer: create VM and UDN -- apiVersion: v1 kind: Namespace metadata:   name: test12   labels:     k8s.ovn.org/primary-user-defined-network: "" --- apiVersion: k8s.ovn.org/v1 kind: UserDefinedNetwork metadata:   name: namespace-scoped   namespace: test12 spec:   topology: Layer2   layer2:     role: Primary     ipam:       lifecycle: Persistent     subnets:       - 203.203.0.0/16       - 2010:100:200::0/60 --- apiVersion: kubevirt.io/v1 kind: VirtualMachine metadata:   labels:     app: iperf-server   name: vm-a   namespace: test12   annotations:     k8s.ovn.org/open- default -ports: |       - protocol: tcp         port: 22 spec:   runStrategy: Always   template:     metadata:       name: vm-a       namespace: test12       labels:         app: iperf-server       annotations:         k8s.ovn.org/open- default -ports: |           - protocol: tcp             port: 22     spec:       domain:         devices:           disks:           - disk:               bus: virtio             name: containerdisk           - disk:               bus: virtio             name: cloudinitdisk           interfaces:           - name: isolated-namespace             binding:               name: l2bridge           rng: {}         resources:           requests:             memory: 2048M       networks:       - pod: {}         name: isolated-namespace       terminationGracePeriodSeconds: 0       volumes:       - containerDisk:           image: quay.io/kubevirtci/fedora-with-test-tooling:v20241128-4d4c8fe         name: containerdisk       - cloudInitNoCloud:           userData: |-             #cloud-config             password: fedora             chpasswd: { expire: False }             runcmd:               - [ "iperf3" , "-s" , "-D" , "--logfile" , "/tmp/iperf3.log" ]           networkData: |-             version: 2             ethernets:               eth0:                 dhcp4: true                 dhcp6: true         name: cloudinitdisk --- apiVersion: v1 kind: Service metadata:   name: iperf3-server-vm-a   namespace: test12 spec:   ports:   - port: 5201   ipFamilyPolicy: PreferDualStack   selector:     app: iperf-server   sessionAffinity: None   type: NodePort Start iperf3 client towards the nodeport service iperf3 -p $(kubectl get svc -n test12 iperf3-server-vm-a -o json |jq '.spec.ports[0].nodePort' ) -c [node ip] -t 0 Do a migration with  virtctl migrate -n test12 vm-a During tcp connections the iperf3 client output will be [  5]  31.00-32.00  sec  2.00 GBytes  17.1 Gbits/sec    0   2.72 MBytes        [  5]  32.00-33.00  sec  2.03 GBytes  17.4 Gbits/sec    0   2.72 MBytes        [  5]  33.00-34.00  sec  2.02 GBytes  17.3 Gbits/sec    0   3.16 MBytes        [  5]  34.00-35.00  sec  2.01 GBytes  17.3 Gbits/sec    0   3.16 MBytes        [  5]  35.00-36.00  sec  1.97 GBytes  16.9 Gbits/sec   47   3.16 MBytes        [  5]  36.00-37.00  sec  1.99 GBytes  17.1 Gbits/sec    0   3.16 MBytes        [  5]  37.00-38.00  sec  1.96 GBytes  16.8 Gbits/sec    0   3.16 MBytes        [  5]  38.00-39.00  sec  1.88 GBytes  16.2 Gbits/sec   60   3.16 MBytes        [  5]  39.00-40.00  sec  1.90 GBytes  16.4 Gbits/sec    0   3.16 MBytes        [  5]  40.00-41.00  sec  1.95 GBytes  16.8 Gbits/sec    0   3.16 MBytes        [  5]  41.00-42.00  sec  1.86 GBytes  16.0 Gbits/sec    0   3.16 MBytes        [  5]  42.00-43.00  sec  2.02 GBytes  17.3 Gbits/sec    0   3.16 MBytes        [  5]  43.00-44.00  sec  1.91 GBytes  16.4 Gbits/sec    0   3.16 MBytes        [  5]  44.00-45.00  sec  1.93 GBytes  16.6 Gbits/sec    1   3.16 MBytes        [  5]  45.00-46.00  sec  1.90 GBytes  16.3 Gbits/sec    0   3.16 MBytes        [  5]  46.00-47.00  sec  1.93 GBytes  16.6 Gbits/sec    0   3.16 MBytes        [  5]  47.00-48.00  sec  1.90 GBytes  16.3 Gbits/sec    0   3.16 MBytes        [  5]  48.00-49.00  sec   457 MBytes  3.83 Gbits/sec  264   1.32 KBytes        [  5]  49.00-50.00  sec   862 MBytes  7.23 Gbits/sec  1991   3.10 MBytes        [  5]  50.00-51.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  51.00-52.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  52.00-53.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  53.00-54.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  54.00-55.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  55.00-56.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  56.00-57.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  57.00-58.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  58.00-59.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  59.00-60.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  60.00-61.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  61.00-62.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  62.00-63.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  63.00-64.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes        [  5]  64.00-65.00  sec  0.00 Bytes  0.00 bits/sec    0   3.10 MBytes  That shows that tcp connection is broken