The guest IP address information in wrong for a VM connected to a dual-stack localnet network. The guest information only displays an IPv6 address even if the guest OS has IPv6 disabled.

OCP 4.16.19
kubevirt-hyperconverged-operator.v4.16.13

Always. Reproduced also in OpenShift Virtualization 4.19.3

1. OCP cluster configured as single-stack IPv4.
2. Localnet network for dual-stack VLAN. Router advertisements enable SLAAC in this network.
3. RHEL VM is connected to the localnet network. The guest OS has IPv6 disabled.

The only IP information for the VM is an IPv6 address:

~~~
$ oc get vmi rhel-10-teal-trout-97 -o jsonpath='{.status.interfaces}' | jq
[
  {
    "infoSource": "domain, guest-agent, multus-status",
    "interfaceName": "enp1s0",
    "ipAddress": "2620:52:0:25c8:6e:18ff:fe00:1",
    "ipAddresses": [
      "2620:52:0:25c8:6e:18ff:fe00:1"
    ],
    "linkState": "up",
    "mac": "02:6e:18:00:00:01",
    "name": "default",
    "podInterfaceName": "pod37a8eec1ce1",
    "queueCount": 1
  }
]
~~~

The VM only has an IPv4 address, and the guest agent reports the same:

~~~
$ ssh rhel@rhel-10-teal-trout-97.sbr-virt.gsslab.brq2.redhat.com ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host noprefixroute 
       valid_lft forever preferred_lft forever
2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 02:6e:18:00:00:01 brd ff:ff:ff:ff:ff:ff
    altname enx026e18000001
    inet 10.37.200.113/23 brd 10.37.201.255 scope global dynamic noprefixroute enp1s0
       valid_lft 28665sec preferred_lft 28665sec


$ oc exec virt-launcher-rhel-10-teal-trout-97-scbdq -- virsh qemu-agent-command 1 '{"execute": "guest-network-get-interfaces"}' | jq
{
  "return": [
    {
      "name": "lo",
      "ip-addresses": [
        {
          "ip-address-type": "ipv4",
          "ip-address": "127.0.0.1",
          "prefix": 8
        },
        {
          "ip-address-type": "ipv6",
          "ip-address": "::1",
          "prefix": 128
        }
      ],
      "statistics": {
        "tx-packets": 6,
        "tx-errs": 0,
        "rx-bytes": 416,
        "rx-dropped": 0,
        "rx-packets": 6,
        "rx-errs": 0,
        "tx-bytes": 416,
        "tx-dropped": 0
      },
      "hardware-address": "00:00:00:00:00:00"
    },
    {
      "name": "enp1s0",
      "ip-addresses": [
        {
          "ip-address-type": "ipv4",
          "ip-address": "10.37.200.113",
          "prefix": 23
        }
      ],
      "statistics": {
        "tx-packets": 71,
        "tx-errs": 0,
        "rx-bytes": 76524,
        "rx-dropped": 0,
        "rx-packets": 1248,
        "rx-errs": 0,
        "tx-bytes": 9718,
        "tx-dropped": 0
      },
      "hardware-address": "02:6e:18:00:00:01"
    }
  ]
}
~~~

VMI only reports a IPv6 address:

~~~
$ oc get vmi rhel-10-teal-trout-97 -o jsonpath='{.status.interfaces}' | jq
[
  {
    "infoSource": "domain, guest-agent, multus-status",
    "interfaceName": "enp1s0",
    "ipAddress": "2620:52:0:25c8:6e:18ff:fe00:1",
    "ipAddresses": [
      "2620:52:0:25c8:6e:18ff:fe00:1"
    ],
    "linkState": "up",
    "mac": "02:6e:18:00:00:01",
    "name": "default",
    "podInterfaceName": "pod37a8eec1ce1",
    "queueCount": 1
  }
]
~~~

The IPv6 address has been assigned to the pod interface:

~~~
$ oc rsh virt-launcher-rhel-10-teal-trout-97-scbdq ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0@if2825: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1400 qdisc noqueue state UP group default 
    link/ether 0a:58:0a:83:01:5e brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 10.131.1.94/23 brd 10.131.1.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::858:aff:fe83:15e/64 scope link 
       valid_lft forever preferred_lft forever
3: 37a8eec1ce1-nic@if2826: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master k6t-37a8eec1ce1 state UP group default 
    link/ether ce:52:c4:15:5b:43 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet6 fe80::cc52:c4ff:fe15:5b43/64 scope link 
       valid_lft forever preferred_lft forever
4: k6t-37a8eec1ce1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether ca:1b:b6:78:3b:b4 brd ff:ff:ff:ff:ff:ff
    inet6 2620:52:0:25c8:c81b:b6ff:fe78:3bb4/64 scope global dynamic mngtmpaddr 
       valid_lft 2591904sec preferred_lft 604704sec
    inet6 fe80::cc52:c4ff:fe15:5b43/64 scope link 
       valid_lft forever preferred_lft forever
5: tap37a8eec1ce1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master k6t-37a8eec1ce1 state UP group default qlen 1000
    link/ether ca:1b:b6:78:3b:b4 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::c81b:b6ff:fe78:3bb4/64 scope link 
       valid_lft forever preferred_lft forever
6: pod37a8eec1ce1: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 02:6e:18:00:00:01 brd ff:ff:ff:ff:ff:ff
    inet6 2620:52:0:25c8:6e:18ff:fe00:1/64 scope global 
       valid_lft forever preferred_lft forever
    inet6 fe80::6e:18ff:fe00:1/64 scope link 
       valid_lft forever preferred_lft forever
~~~

The guest IP address information has to be accurate.

Also, the pod interface getting a SLAAC address is probably undesired, so we should evaluate if this interface has to accept the router advertisements.