On ipv6 singlestack cluster, mDNS is advertising all addresses of interface.

 sudo $(which oc) --kubeconfig /var/lib/microshift/resources/kubeadmin/kubeconfig get node -o wide
NAME                     STATUS   ROLES                         AGE    VERSION   INTERNAL-IP                        EXTERNAL-IP   OS-IMAGE                              KERNEL-VERSION                 CONTAINER-RUNTIME
microshift-zzhao.local   Ready    control-plane,master,worker   119m   v1.30.3   2620:52:0:1eb:518f:da3a:788:87c7   <none>        Red Hat Enterprise Linux 9.4 (Plow)   5.14.0-427.33.1.el9_4.x86_64   cri-o://1.30.5-4.rhaos4.17.gitf258695.el9


from node yaml file:

  status:
    addresses:
    - address: 2620:52:0:1eb:518f:da3a:788:87c7
      type: InternalIP
    - address: microshift-zzhao.local
      type: Hostname


[redhat@microshift-dev ~]$ avahi-resolve-host-name -6 microshift-zzhao.local
microshift-zzhao.local	2620:52:0:1eb:518f:da3a:788:87c7
[redhat@microshift-dev ~]$ avahi-resolve-host-name -6 microshift-zzhao.local
microshift-zzhao.local	fe80::3227:aae3:c13e:e0c
[redhat@microshift-dev ~]$ avahi-resolve-host-name microshift-zzhao.local
microshift-zzhao.local    10.1.235.123

microshift version
MicroShift Version: 4.17.0~ec.3
Base OCP Version: 4.17.0-ec.3

 always

    1. setup ipv6 singlestack microshift cluster
    2. from another client out of cluster
       avahi-resolve-host-name microshift-zzhao.local
       avahi-resolve-host-name -6 microshift-zzhao.local     
    3.
    

    as $descripion

           avahi-resolve-host-name microshift-zzhao.local 
  should only return 2620:52:0:1eb:518f:da3a:788:87c7