Description of problem:
-----------------------
Installation of single-stack IPv6 BM IPI fails. There are just 2 cluster operators reporting state:

oc get co
NAME                                       VERSION   AVAILABLE   PROGRESSING   DEGRADED   SINCE
authentication
cloud-credential                                     True        False         False      61m
cluster-autoscaler
config-operator
console
csi-snapshot-controller
dns
etcd
image-registry
ingress
insights
kube-apiserver
kube-controller-manager
kube-scheduler
kube-storage-version-migrator
machine-api
machine-approver
machine-config
marketplace
monitoring
network                                              False       True          True       50m
node-tuning
openshift-apiserver
openshift-controller-manager
openshift-samples
operator-lifecycle-manager
operator-lifecycle-manager-catalog
operator-lifecycle-manager-packageserver
service-ca
storage

oc describe co network
Name:         network
Namespace:
Labels:       <none>
Annotations:  network.operator.openshift.io/last-seen-state:
                {"DaemonsetStates":[{"Namespace":"openshift-ovn-kubernetes","Name":"ovnkube-node","LastSeenStatus":{"currentNumberScheduled":3,"numberMiss...
API Version:  config.openshift.io/v1
Kind:         ClusterOperator
Metadata:
  Creation Timestamp:  2020-08-11T07:22:41Z
  Generation:          1
  Managed Fields:
    API Version:  config.openshift.io/v1
    Fields Type:  FieldsV1
    fieldsV1:
      f:spec:
      f:status:
        .:
        f:extension:
        f:versions:
    Manager:      cluster-version-operator
    Operation:    Update
    Time:         2020-08-11T07:22:41Z
    API Version:  config.openshift.io/v1
    Fields Type:  FieldsV1
    fieldsV1:
      f:metadata:
        f:annotations:
          .:
          f:network.operator.openshift.io/last-seen-state:
      f:status:
        f:conditions:
        f:relatedObjects:
    Manager:         cluster-network-operator
    Operation:       Update
    Time:            2020-08-11T08:24:49Z
  Resource Version:  14775
  Self Link:         /apis/config.openshift.io/v1/clusteroperators/network
  UID:               30964321-028b-44d5-960a-ba75e1e25fa0
Spec:
Status:
  Conditions:
    Last Transition Time:  2020-08-11T07:38:32Z
    Message:               DaemonSet "openshift-ovn-kubernetes/ovnkube-node" rollout is not making progress - pod ovnkube-node-lnhgh is in CrashLoopBackOff State
DaemonSet "openshift-ovn-kubernetes/ovnkube-node" rollout is not making progress - pod ovnkube-node-ccbbv is in CrashLoopBackOff State
DaemonSet "openshift-ovn-kubernetes/ovnkube-node" rollout is not making progress - pod ovnkube-node-f4mjg is in CrashLoopBackOff State
DaemonSet "openshift-ovn-kubernetes/ovnkube-node" rollout is not making progress - last change 2020-08-11T07:33:33Z
    Reason:                RolloutHung
    Status:                True
    Type:                  Degraded
    Last Transition Time:  2020-08-11T07:33:26Z
    Status:                True
    Type:                  Upgradeable
    Last Transition Time:  2020-08-11T07:33:32Z
    Message:               DaemonSet "openshift-multus/network-metrics-daemon" is not available (awaiting 3 nodes)
DaemonSet "openshift-multus/multus-admission-controller" is waiting for other operators to become ready
DaemonSet "openshift-ovn-kubernetes/ovnkube-master-metrics" is not available (awaiting 3 nodes)
DaemonSet "openshift-ovn-kubernetes/ovnkube-node" is not available (awaiting 3 nodes)
DaemonSet "openshift-ovn-kubernetes/ovnkube-node-metrics" is not available (awaiting 3 nodes)
    Reason:                Deploying
    Status:                True
    Type:                  Progressing
    Last Transition Time:  2020-08-11T07:33:32Z
    Message:               The network is starting up
    Reason:                Startup
    Status:                False
    Type:                  Available
  Extension:               <nil>
  Related Objects:
    Group:
    Name:       applied-cluster
    Namespace:  openshift-network-operator
    Resource:   configmaps
    Group:      apiextensions.k8s.io
    Name:       network-attachment-definitions.k8s.cni.cncf.io
    Resource:   customresourcedefinitions
    Group:      apiextensions.k8s.io
    Name:       ippools.whereabouts.cni.cncf.io
    Resource:   customresourcedefinitions
    Group:      apiextensions.k8s.io
    Name:       overlappingrangeipreservations.whereabouts.cni.cncf.io
    Resource:   customresourcedefinitions
    Group:
    Name:       openshift-multus
    Resource:   namespaces
    Group:      rbac.authorization.k8s.io
    Name:       multus
    Resource:   clusterroles
    Group:
    Name:       multus
    Namespace:  openshift-multus
    Resource:   serviceaccounts
    Group:      rbac.authorization.k8s.io
    Name:       multus
    Resource:   clusterrolebindings
    Group:      rbac.authorization.k8s.io
    Name:       multus-whereabouts
    Resource:   clusterrolebindings
    Group:      rbac.authorization.k8s.io
    Name:       whereabouts-cni
    Resource:   clusterroles
    Group:
    Name:       cni-binary-copy-script
    Namespace:  openshift-multus
    Resource:   configmaps
    Group:      apps
    Name:       multus
    Namespace:  openshift-multus
    Resource:   daemonsets
    Group:
    Name:       metrics-daemon-sa
    Namespace:  openshift-multus
    Resource:   serviceaccounts
    Group:      rbac.authorization.k8s.io
    Name:       metrics-daemon-role
    Resource:   clusterroles
    Group:      rbac.authorization.k8s.io
    Name:       metrics-daemon-sa-rolebinding
    Resource:   clusterrolebindings
    Group:      apps
    Name:       network-metrics-daemon
    Namespace:  openshift-multus
    Resource:   daemonsets
    Group:      monitoring.coreos.com
    Name:       monitor-network
    Namespace:  openshift-multus
    Resource:   servicemonitors
    Group:
    Name:       network-metrics-service
    Namespace:  openshift-multus
    Resource:   services
    Group:      rbac.authorization.k8s.io
    Name:       prometheus-k8s
    Namespace:  openshift-multus
    Resource:   roles
    Group:      rbac.authorization.k8s.io
    Name:       prometheus-k8s
    Namespace:  openshift-multus
    Resource:   rolebindings
    Group:
    Name:       multus-admission-controller
    Namespace:  openshift-multus
    Resource:   services
    Group:      rbac.authorization.k8s.io
    Name:       multus-admission-controller-webhook
    Resource:   clusterroles
    Group:      rbac.authorization.k8s.io
    Name:       multus-admission-controller-webhook
    Resource:   clusterrolebindings
    Group:      admissionregistration.k8s.io
    Name:       multus.openshift.io
    Resource:   validatingwebhookconfigurations
    Group:
    Name:       openshift-service-ca                                                                                                                                                             [96/1886]
    Namespace:  openshift-network-operator
    Resource:   configmaps
    Group:      apps
    Name:       multus-admission-controller
    Namespace:  openshift-multus
    Resource:   daemonsets
    Group:      monitoring.coreos.com
    Name:       monitor-multus-admission-controller
    Namespace:  openshift-multus
    Resource:   servicemonitors
    Group:      rbac.authorization.k8s.io
    Name:       prometheus-k8s
    Namespace:  openshift-multus
    Resource:   roles
    Group:      rbac.authorization.k8s.io
    Name:       prometheus-k8s
    Namespace:  openshift-multus
    Resource:   rolebindings
    Group:      monitoring.coreos.com
    Name:       prometheus-k8s-rules
    Namespace:  openshift-multus
    Resource:   prometheusrules
    Group:
    Name:       openshift-ovn-kubernetes
    Resource:   namespaces
    Group:      apiextensions.k8s.io
    Name:       egressfirewalls.k8s.ovn.org
    Resource:   customresourcedefinitions
    Group:      apiextensions.k8s.io
    Name:       egressips.k8s.ovn.org
    Resource:   customresourcedefinitions
    Group:
    Name:       ovn-kubernetes-node
    Namespace:  openshift-ovn-kubernetes
    Resource:   serviceaccounts
    Group:      rbac.authorization.k8s.io
    Name:       openshift-ovn-kubernetes-node
    Resource:   clusterroles
    Group:      rbac.authorization.k8s.io
    Name:       openshift-ovn-kubernetes-node
    Resource:   clusterrolebindings
    Group:
    Name:       ovn-kubernetes-controller
    Namespace:  openshift-ovn-kubernetes
    Resource:   serviceaccounts
    Group:      rbac.authorization.k8s.io
    Name:       openshift-ovn-kubernetes-controller
    Resource:   clusterroles
    Group:      rbac.authorization.k8s.io
    Name:       openshift-ovn-kubernetes-controller
    Resource:   clusterrolebindings
    Group:      rbac.authorization.k8s.io
    Name:       openshift-ovn-kubernetes-sbdb
    Namespace:  openshift-ovn-kubernetes
    Resource:   roles
    Group:      rbac.authorization.k8s.io
    Name:       openshift-ovn-kubernetes-sbdb
    Namespace:  openshift-ovn-kubernetes
    Resource:   rolebindings
    Group:      rbac.authorization.k8s.io
    Name:       openshift-ovn-kubernetes-metrics
    Resource:   clusterroles
    Group:
    Name:       openshift-ovn-kubernetes-metrics
    Namespace:  openshift-ovn-kubernetes
    Resource:   serviceaccounts
    Group:      rbac.authorization.k8s.io
    Name:       openshift-ovn-kubernetes-metrics
    Resource:   clusterrolebindings
    Group:
    Name:       ovnkube-config
    Namespace:  openshift-ovn-kubernetes
    Resource:   configmaps
    Group:
    Name:       ovnkube-db
    Namespace:  openshift-ovn-kubernetes
    Resource:   services
    Group:      apps
    Name:       ovs-node
    Namespace:  openshift-ovn-kubernetes
    Resource:   daemonsets
    Group:      network.operator.openshift.io
    Name:       ovn
    Namespace:  openshift-ovn-kubernetes
    Resource:   operatorpkis
    Group:      monitoring.coreos.com
    Name:       master-rules
    Namespace:  openshift-ovn-kubernetes
    Resource:   prometheusrules
    Group:      monitoring.coreos.com
    Name:       networking-rules
    Namespace:  openshift-ovn-kubernetes
    Resource:   prometheusrules
    Group:      monitoring.coreos.com
    Name:       monitor-ovn-master-metrics
    Namespace:  openshift-ovn-kubernetes
    Resource:   servicemonitors
    Group:
    Name:       ovn-kubernetes-master-metrics
    Namespace:  openshift-ovn-kubernetes
    Resource:   services
    Group:      monitoring.coreos.com
    Name:       monitor-ovn-node-metrics
    Namespace:  openshift-ovn-kubernetes
    Resource:   servicemonitors
    Group:
    Name:       ovn-kubernetes-node-metrics
    Namespace:  openshift-ovn-kubernetes
    Resource:   services
    Group:      rbac.authorization.k8s.io
    Name:       prometheus-k8s
    Namespace:  openshift-ovn-kubernetes
    Resource:   roles
    Group:      rbac.authorization.k8s.io
    Name:       prometheus-k8s
    Namespace:  openshift-ovn-kubernetes
    Resource:   rolebindings
    Group:      policy
    Name:       ovn-raft-quorum-guard
    Namespace:  openshift-ovn-kubernetes
    Resource:   poddisruptionbudgets
    Group:      apps
    Name:       ovnkube-master
    Namespace:  openshift-ovn-kubernetes
    Resource:   daemonsets
    Group:      apps
    Name:       ovnkube-master-metrics
    Namespace:  openshift-ovn-kubernetes
    Resource:   daemonsets
    Group:      apps
    Name:       ovnkube-node
    Namespace:  openshift-ovn-kubernetes
    Resource:   daemonsets
    Group:      apps
    Name:       ovnkube-node-metrics
    Namespace:  openshift-ovn-kubernetes
    Resource:   daemonsets
    Group:
    Name:       openshift-network-operator
    Resource:   namespaces
Events:         <none>

oc get po -n openshift-ovn-kubernetes -o wide
NAME                           READY   STATUS              RESTARTS   AGE   IP                    NODE                                              NOMINATED NODE   READINESS GATES
ovnkube-master-7t9cd           4/4     Running             2          54m   fd2e:6f44:5dd8::123   master-0-1.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovnkube-master-kwh8f           4/4     Running             0          54m   fd2e:6f44:5dd8::145   master-0-2.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovnkube-master-metrics-hblwf   0/1     ContainerCreating   0          54m   fd2e:6f44:5dd8::123   master-0-1.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovnkube-master-metrics-nbkcv   0/1     ContainerCreating   0          54m   fd2e:6f44:5dd8::13c   master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovnkube-master-metrics-wq7bc   0/1     ContainerCreating   0          54m   fd2e:6f44:5dd8::145   master-0-2.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovnkube-master-x5t4q           4/4     Running             0          54m   fd2e:6f44:5dd8::13c   master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovnkube-node-ccbbv             1/2     CrashLoopBackOff    15         54m   fd2e:6f44:5dd8::13c   master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovnkube-node-f4mjg             1/2     CrashLoopBackOff    15         54m   fd2e:6f44:5dd8::123   master-0-1.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovnkube-node-lnhgh             1/2     CrashLoopBackOff    15         54m   fd2e:6f44:5dd8::145   master-0-2.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovnkube-node-metrics-h62zl     0/1     ContainerCreating   0          54m   fd2e:6f44:5dd8::13c   master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovnkube-node-metrics-pgfls     0/1     ContainerCreating   0          54m   fd2e:6f44:5dd8::123   master-0-1.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovnkube-node-metrics-q2b7c     0/1     ContainerCreating   0          54m   fd2e:6f44:5dd8::145   master-0-2.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovs-node-nscjp                 1/1     Running             0          54m   fd2e:6f44:5dd8::13c   master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovs-node-z8lm4                 1/1     Running             0          54m   fd2e:6f44:5dd8::123   master-0-1.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>
ovs-node-zsrjh                 1/1     Running             0          54m   fd2e:6f44:5dd8::145   master-0-2.ocp-edge-cluster-0.qe.lab.redhat.com   <none>           <none>

oc describe po ovnkube-node-ccbbv  -n openshift-ovn-kubernetes
Name:                 ovnkube-node-ccbbv
Namespace:            openshift-ovn-kubernetes
Priority:             2000001000
Priority Class Name:  system-node-critical
Node:                 master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com/fd2e:6f44:5dd8::13c
Start Time:           Tue, 11 Aug 2020 07:33:33 +0000
Labels:               app=ovnkube-node
                      component=network
                      controller-revision-hash=f8b799587
                      kubernetes.io/os=linux
                      openshift.io/component=network
                      pod-template-generation=1
                      type=infra
Annotations:          <none>
Status:               Running
IP:                   fd2e:6f44:5dd8::13c
IPs:
  IP:           fd2e:6f44:5dd8::13c
Controlled By:  DaemonSet/ovnkube-node
Containers:
  ovn-controller:
    Container ID:  cri-o://c6d5cc4c96916f2c64037b46c1898af6189881f66fcbe5b0c6cfd4cdabe1c440
    Image:         quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:3e4e5b6369bf17839a0e8e1bfb2b5bf6cce7b4631d83ec6c06d7ec329f8e4457
    Image ID:      quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:3e4e5b6369bf17839a0e8e1bfb2b5bf6cce7b4631d83ec6c06d7ec329f8e4457
    Port:          <none>
    Host Port:     <none>
    Command:
      /bin/bash
      -c
      set -e
      if [[ -f "/env/${K8S_NODE}" ]]; then
        set -o allexport
        source "/env/${K8S_NODE}"
        set +o allexport
      fi
      echo "$(date -Iseconds) - starting ovn-controller"
      exec ovn-controller unix:/var/run/openvswitch/db.sock -vfile:off \
        --no-chdir --pidfile=/var/run/ovn/ovn-controller.pid \
        -p /ovn-cert/tls.key -c /ovn-cert/tls.crt -C /ovn-ca/ca-bundle.crt \
        -vconsole:"${OVN_LOG_LEVEL}"

    State:          Running
      Started:      Tue, 11 Aug 2020 07:33:50 +0000
    Ready:          True
    Restart Count:  0
    Requests:
      cpu:     10m
      memory:  300Mi
    Environment:
      OVN_LOG_LEVEL:  info
      K8S_NODE:        (v1:spec.nodeName)
    Mounts:
      /env from env-overrides (rw)
      /etc/openvswitch from etc-openvswitch (rw)
      /etc/ovn/ from etc-openvswitch (rw)
      /ovn-ca from ovn-ca (rw)
      /ovn-cert from ovn-cert (rw)
      /run/openvswitch from run-openvswitch (rw)
      /run/ovn/ from run-ovn (rw)
      /var/lib/openvswitch from var-lib-openvswitch (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from ovn-kubernetes-node-token-lq9tv (ro)
  ovnkube-node:
    Container ID:  cri-o://64ce52ccf000a8bde204d968f04f6515eb4862db00c8a3f53f1600829ea5677a
    Image:         quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:3e4e5b6369bf17839a0e8e1bfb2b5bf6cce7b4631d83ec6c06d7ec329f8e4457
    Image ID:      quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:3e4e5b6369bf17839a0e8e1bfb2b5bf6cce7b4631d83ec6c06d7ec329f8e4457
    Port:          29103/TCP
    Host Port:     29103/TCP
    Command:
      /bin/bash
      -c
      set -xe
      if [[ -f "/env/${K8S_NODE}" ]]; then
        set -o allexport
        source "/env/${K8S_NODE}"
        set +o allexport
      fi
      echo "I$(date "+%m%d %H:%M:%S.%N") - waiting for db_ip addresses"
      cp -f /usr/libexec/cni/ovn-k8s-cni-overlay /cni-bin-dir/
      ovn_config_namespace=openshift-ovn-kubernetes
      echo "I$(date "+%m%d %H:%M:%S.%N") - disable conntrack on geneve port"
      iptables -t raw -A PREROUTING -p udp --dport 6081 -j NOTRACK
      iptables -t raw -A OUTPUT -p udp --dport 6081 -j NOTRACK
      retries=0
      while true; do
        db_ip=$(kubectl get ep -n ${ovn_config_namespace} ovnkube-db -o jsonpath='{.subsets[0].addresses[0].ip}')
        if [[ -n "${db_ip}" ]]; then
          break
        fi
        (( retries += 1 ))
        if [[ "${retries}" -gt 40 ]]; then
          echo "E$(date "+%m%d %H:%M:%S.%N") - db endpoint never came up"
          exit 1
        fi
        echo "I$(date "+%m%d %H:%M:%S.%N") - waiting for db endpoint"
        sleep 5
      done
      echo "I$(date "+%m%d %H:%M:%S.%N") - starting ovnkube-node db_ip ${db_ip}"
      hybrid_overlay_flags=
      if [[ -n "" ]]; then
        hybrid_overlay_flags="--enable-hybrid-overlay --no-hostsubnet-nodes=kubernetes.io/os=windows"
        if [[ -n "" ]]; then
          hybrid_overlay_flags="${hybrid_overlay_flags} --hybrid-overlay-cluster-subnets="
        fi
        if [[ -n "" ]]; then
          hybrid_overlay_flags="${hybrid_overlay_flags} --hybrid-overlay-vxlan-port="
        fi
      fi

      exec /usr/bin/ovnkube --init-node "${K8S_NODE}" \
        --nb-address "ssl:[fd2e:6f44:5dd8::123]:9641,ssl:[fd2e:6f44:5dd8::13c]:9641,ssl:[fd2e:6f44:5dd8::145]:9641" \
        --sb-address "ssl:[fd2e:6f44:5dd8::123]:9642,ssl:[fd2e:6f44:5dd8::13c]:9642,ssl:[fd2e:6f44:5dd8::145]:9642" \
        --nb-client-privkey /ovn-cert/tls.key \
        --nb-client-cert /ovn-cert/tls.crt \
        --nb-client-cacert /ovn-ca/ca-bundle.crt \
        --nb-cert-common-name "ovn" \
        --sb-client-privkey /ovn-cert/tls.key \
        --sb-client-cert /ovn-cert/tls.crt \
        --sb-client-cacert /ovn-ca/ca-bundle.crt \
        --sb-cert-common-name "ovn" \
        --config-file=/run/ovnkube-config/ovnkube.conf \
        --loglevel "${OVN_KUBE_LOG_LEVEL}" \
        --inactivity-probe="${OVN_CONTROLLER_INACTIVITY_PROBE}" \
        ${hybrid_overlay_flags} \
        --gateway-mode shared \
        --gateway-interface br-ex \
        --metrics-bind-address "127.0.0.1:29103"

    State:       Waiting
      Reason:    CrashLoopBackOff
    Last State:  Terminated
      Reason:    Error
      Message:   ut=15 set Open_vSwitch . external_ids:ovn-remote="ssl:[fd2e:6f44:5dd8::123]:9642,ssl:[fd2e:6f44:5dd8::13c]:9642,ssl:[fd2e:6f44:5dd8::145]:9642"
I0811 08:26:07.531837  117553 ovs.go:157] exec(1): /usr/bin/ovs-vsctl --timeout=15 set Open_vSwitch . external_ids:ovn-encap-type=geneve external_ids:ovn-encap-ip=fd2e:6f44:5dd8::13c external_ids:ovn-r>
I0811 08:26:07.536485  117553 ovs.go:160] exec(1): stdout: ""
I0811 08:26:07.536572  117553 ovs.go:161] exec(1): stderr: ""
I0811 08:26:07.538963  117553 node.go:205] Node master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com ready for ovn initialization with subnet fd01:0:0:1::/64
I0811 08:26:07.539152  117553 ovs.go:157] exec(2): /usr/bin/ovs-appctl --timeout=15 -t /var/run/ovn/ovn-controller.4436.ctl connection-status
I0811 08:26:07.542105  117553 ovs.go:160] exec(2): stdout: "connected\n"
I0811 08:26:07.542181  117553 ovs.go:161] exec(2): stderr: ""
I0811 08:26:07.542225  117553 node.go:119] Node master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com connection status = connected
I0811 08:26:07.542250  117553 ovs.go:157] exec(3): /usr/bin/ovs-vsctl --timeout=15 -- br-exists br-int
I0811 08:26:07.546717  117553 ovs.go:160] exec(3): stdout: ""
I0811 08:26:07.546775  117553 ovs.go:161] exec(3): stderr: ""
I0811 08:26:07.546816  117553 ovs.go:157] exec(4): /usr/bin/ovs-ofctl dump-aggregate br-int
I0811 08:26:07.550185  117553 ovs.go:160] exec(4): stdout: "NXST_AGGREGATE reply (xid=0x4): packet_count=0 byte_count=0 flow_count=7\n"
I0811 08:26:07.550300  117553 ovs.go:161] exec(4): stderr: ""
I0811 08:26:07.550413  117553 factory.go:668] Added *v1.Service event handler 1
I0811 08:26:07.550451  117553 factory.go:668] Added *v1.Endpoints event handler 2
I0811 08:26:07.550479  117553 factory.go:668] Added *v1.Service event handler 3
F0811 08:26:07.550667  117553 ovnkube.go:129] failed to get default gateway interface

      Exit Code:    1
      Started:      Tue, 11 Aug 2020 08:26:06 +0000
      Finished:     Tue, 11 Aug 2020 08:26:07 +0000
    Ready:          False
    Restart Count:  15
    Requests:
      cpu:      10m
      memory:   300Mi
    Readiness:  exec [test -f /etc/cni/net.d/10-ovn-kubernetes.conf] delay=5s timeout=1s period=5s #success=1 #failure=3
    Environment:
      KUBERNETES_SERVICE_PORT:          6443
      KUBERNETES_SERVICE_HOST:          api-int.ocp-edge-cluster-0.qe.lab.redhat.com
      OVN_CONTROLLER_INACTIVITY_PROBE:  30000
      OVN_KUBE_LOG_LEVEL:               4
      K8S_NODE:                          (v1:spec.nodeName)
    Mounts:
      /cni-bin-dir from host-cni-bin (rw)
      /env from env-overrides (rw)
      /etc/cni/net.d from host-cni-netd (rw)
      /etc/openvswitch from etc-openvswitch (rw)
      /etc/ovn/ from etc-openvswitch (rw)
      /host from host-slash (ro)
      /ovn-ca from ovn-ca (rw)
      /ovn-cert from ovn-cert (rw)
      /run/netns from host-run-netns (ro)
      /run/openvswitch from run-openvswitch (rw)
      /run/ovn-kubernetes/ from host-run-ovn-kubernetes (rw)
      /run/ovn/ from run-ovn (rw)
      /run/ovnkube-config/ from ovnkube-config (rw)
      /var/lib/cni/networks/ovn-k8s-cni-overlay from host-var-lib-cni-networks-ovn-kubernetes (rw)
      /var/lib/openvswitch from var-lib-openvswitch (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from ovn-kubernetes-node-token-lq9tv (ro)
Conditions:
  Type              Status
  Initialized       True
  Ready             False
  ContainersReady   False
  PodScheduled      True
Volumes:
  host-slash:
    Type:          HostPath (bare host directory volume)
    Path:          /
    HostPathType:
  host-run-netns:
    Type:          HostPath (bare host directory volume)
    Path:          /run/netns
    HostPathType:
  var-lib-openvswitch:
    Type:          HostPath (bare host directory volume)
    Path:          /var/lib/openvswitch/data
    HostPathType:
  etc-openvswitch:
    Type:          HostPath (bare host directory volume)
    Path:          /var/lib/openvswitch/etc
    HostPathType:
  run-openvswitch:
    Type:          HostPath (bare host directory volume)
    Path:          /var/run/openvswitch
    HostPathType:
  run-ovn:
    Type:          HostPath (bare host directory volume)
    Path:          /var/run/ovn
    HostPathType:
  host-run-ovn-kubernetes:
    Type:          HostPath (bare host directory volume)
    Path:          /run/ovn-kubernetes
    HostPathType:
  host-cni-bin:
    Type:          HostPath (bare host directory volume)
    Path:          /var/lib/cni/bin
    HostPathType:
  host-cni-netd:
    Type:          HostPath (bare host directory volume)
    Path:          /var/run/multus/cni/net.d
    HostPathType:
  host-var-lib-cni-networks-ovn-kubernetes:
    Type:          HostPath (bare host directory volume)
    Path:          /var/lib/cni/networks/ovn-k8s-cni-overlay
    HostPathType:
  ovnkube-config:
    Type:      ConfigMap (a volume populated by a ConfigMap)
    Name:      ovnkube-config
    Optional:  false
  env-overrides:
    Type:      ConfigMap (a volume populated by a ConfigMap)
    Name:      env-overrides
    Optional:  true
  ovn-ca:
    Type:      ConfigMap (a volume populated by a ConfigMap)
    Name:      ovn-ca
    Optional:  false
  ovn-cert:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  ovn-cert
    Optional:    false
  ovn-kubernetes-node-token-lq9tv:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  ovn-kubernetes-node-token-lq9tv
    Optional:    false
QoS Class:       Burstable
Node-Selectors:  beta.kubernetes.io/os=linux
Tolerations:     op=Exists
Events:
  Type     Reason     Age                    From                                                      Message
  ----     ------     ----                   ----                                                      -------
  Normal   Scheduled  54m                    default-scheduler                                         Successfully assigned openshift-ovn-kubernetes/ovnkube-node-ccbbv to master-0-0.ocp-edge-cluster-0>
  Normal   Pulling    54m                    kubelet, master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com  Pulling image "quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:3e4e5b6369bf17839a0e8e1bfb2b5>
  Normal   Pulled     54m                    kubelet, master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com  Successfully pulled image "quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:3e4e5b6369bf17839>
  Normal   Created    54m                    kubelet, master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com  Created container ovn-controller
  Normal   Started    54m                    kubelet, master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com  Started container ovn-controller
  Warning  Unhealthy  54m (x6 over 54m)      kubelet, master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com  Readiness probe failed:
  Normal   Pulled     53m (x4 over 54m)      kubelet, master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com  Container image "quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:3e4e5b6369bf17839a0e8e1bfb2>
  Normal   Created    53m (x4 over 54m)      kubelet, master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com  Created container ovnkube-node
  Normal   Started    53m (x4 over 54m)      kubelet, master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com  Started container ovnkube-node
  Warning  BackOff    4m54s (x226 over 54m)  kubelet, master-0-0.ocp-edge-cluster-0.qe.lab.redhat.com  Back-off restarting failed container

Routing table from master node:
[core@master-0-0 ~]$ ip r
[core@master-0-0 ~]$ ip -6 r
::1 dev lo proto kernel metric 256 pref medium
fd00:1101::a97e:4aba:21d7:b54f dev enp4s0 proto kernel metric 100 pref medium
fd00:1101::/64 dev enp4s0 proto ra metric 100 pref medium
fd2e:6f44:5dd8::13c dev br-ex proto kernel metric 800 pref medium
fd2e:6f44:5dd8::/64 dev br-ex proto ra metric 800 pref medium
fe80::/64 dev enp4s0 proto kernel metric 100 pref medium
fe80::/64 dev genev_sys_6081 proto kernel metric 256 pref medium
fe80::/64 dev br-ex proto kernel metric 800 pref medium
default via fe80::5054:ff:fe7d:1535 dev br-ex proto ra metric 800 pref medium




Version-Release number of selected component (if applicable):
-------------------------------------------------------------
4.6.0-0.nightly-2020-08-11-032013

Steps to Reproduce:
-------------------
1. Deploy single-stack IPv6 env

Actual results:
---------------
Deployment fails

Expected results:
-----------------
Deployment succeeds


Additional info:
----------------
Virtual setup: 3masters + 2workers