Description of problem:

idle service cannot be waked up in ipv6 dual stack cluster

Version-Release number of selected component (if applicable):
4.7.0-0.nightly-2021-01-28-005023

How reproducible:
100%

Steps to Reproduce:
1. create test pod and svc
oc create -f https://raw.githubusercontent.com/openshift/verification-tests/master/testdata/networking/list_for_pods.json 

2. create another test pod

oc create -f https://raw.githubusercontent.com/openshift/verification-tests/master/testdata/networking/aosqe-pod-for-ping.json

3. test svc works well

$oc get svc -n z4
NAME           TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)     AGE
test-service   ClusterIP   172.30.147.195   <none>        27017/TCP   35s

$oc rsh hello-pod
~ $ curl 172.30.147.195:27017
Hello OpenShift!

4. oc idle test-service

 oc get ep
NAME           ENDPOINTS   AGE
test-service   <none>      15m

5. curl the service again

~ $ curl --connect-timeout 5 172.30.218.44:27017
curl: (28) Connection timed out after 5001 milliseconds


Actual results:


Expected results:


Additional info: