[Kea-users] ipv6 being ignored

[Darren Ankney]

Try removing the "relay" statement as you don't need it as far as I
can tell.  You are supposed to only need to use that if you need to
select a different subnet than what matches the IP in  the "Link
address" option of the relayed packet.  But you have the same subnet
configured as what you have listed for the relay and also the IP in
"Link address"

https://kea.readthedocs.io/en/kea-2.2.0/arm/dhcp6-srv.html?highlight=relay%20ip-addresses#using-a-specific-relay-agent-for-a-subnet

On Fri, Dec 9, 2022 at 12:24 PM Alan Batie <alan at peak.org> wrote:
>
> Looking for suggestions - tshark shows forwarded dhcpv6 requests being
> received, however they're being ignored:
>
> User Datagram Protocol, Src Port: 547, Dst Port: 547
>      Source Port: 547
>      Destination Port: 547
>      Length: 341
>      Checksum: 0x712b [unverified]
>      [Checksum Status: Unverified]
>      [Stream index: 0]
>      [Timestamps]
>          [Time since first frame: 0.000000000 seconds]
>          [Time since previous frame: 0.000000000 seconds]
>      UDP payload (333 bytes)
> DHCPv6
>      Message type: Relay-forw (12)
>      Hopcount: 1
>      Link address: 2607:f678:1fff:1031::1
>      Peer address: fe80::4a77:46ff:fef9:5bb0
>      Relay Message
>          Option: Relay Message (9)
>          Length: 260
>          DHCPv6
>              Message type: Relay-forw (12)
>              Hopcount: 0
>              Link address: ::
>              Peer address: fe80::4a77:46ff:fef9:5bb0
>              Relay Message
>                  Option: Relay Message (9)
>                  Length: 107
>                  DHCPv6
>                      Message type: Solicit (1)
>                      Transaction ID: 0xf37d54
>                      Elapsed time
>                          Option: Elapsed time (8)
>                          Length: 2
>                          Elapsed time: 655350ms
>                      Option Request
>                          Option: Option Request (6)
>                          Length: 30
>                          Requested Option code: Vendor-specific
> Information (17)
>                          Requested Option code: SIP Server Domain Name
> List (21)
>                          Requested Option code: SIP Servers IPv6 Address
> List (22)
>                          Requested Option code: DNS recursive name
> server (23)
>                          Requested Option code: Domain Search List (24)
>                          Requested Option code: Simple Network Time
> Protocol Server (31)
>                          Requested Option code: NTP Server (56)
>                          Requested Option code: Dual-Stack Lite AFTR
> Name (64)
>                          Requested Option code: Prefix Exclude (67)
>                          Requested Option code: SOL_MAX_RT (82)
>                          Requested Option code: INF_MAX_RT (83)
>                          Requested Option code: S46 MAP-E Container (94)
>                          Requested Option code: S46 MAP-T Container (95)
>                          Requested Option code: S46 Lightweight 4over6
> Container (96)
>                          Requested Option code: Server unicast (12)
> ...
>
>
>
> Relevant configuration:
>
>    "Dhcp6": {
>      "interfaces-config": {
>        "interfaces": [ "ens160/2607:f678::16:91" ],
>      },
> ...
>      "subnet6": [
> ...
>        {
>          "id": 11,
>          "subnet": "2607:f678:1fff:1031::/64",
>          "pools": [
>            {
>              "pool": "2607:f678:1fff:1031::1000 - 2607:f678:1fff:1031::1fff"
>            }
>          ],
>          "pd-pools": [
>          {
>            # Customer lan delegated prefixes
>            "prefix": "2607:f678:2000::",
>            "prefix-len": 36,
>            "delegated-len": 60,
>          }
>          ],
>          "relay": {
>            "ip-addresses": [ "2607:f678:1fff:1031::1" ]
>          }
>        }
>
> kea is actually listening:
>
> netstat -plan | grep :547
> udp6       0      0 2607:f678::16:91:547    :::*
>         18503/kea-dhcp6
> udp6       0      0 fe80::250:56ff:fe99:547 :::*
>         18503/kea-dhcp6
> udp6       0      0 ff02::1:2:547           :::*
>         18503/kea-dhcp6
>
>
> --
> ALAN BATIE
> Senior Systems Engineer
> 541-754-7325
> alan.batie at peakinternet.com <mailto:alan.batie at peakinternet.com>
> www.peakinternet.com <https://www.peakinternet.com>
>
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