[Kea-users] KEA DHCPv6 server ignores relayed solicitations
Oskar Wåglund
oskar.waglund at afry.com
Mon Oct 30 08:13:01 UTC 2023
Hello again everyone,
I have a new lead which I think explains the issue. "Un-relayed" DHCPv6 traffic arrives at IPv6 address ff02::1:2 (all DHCP agents) while relayed IPv6 traffic arrives at IPv6 address ff05::1:3 (all DHCP server (site)). I used netstat -g to confirm that the older ISC DHCP server v4.3.5 (dhcpd) starts listening to both IPv6 addresses, but KEA 2.0.3 only listens to ff02::1:2. Does someone know why this is the case?
/Oskar
-----Original Message-----
From: Oskar Wåglund
Sent: Monday, October 30, 2023 7:50 AM
To: kea-users at lists.isc.org
Subject: KEA DHCPv6 server ignores relayed solicitations
Hi Darren,
Thanks for your reply. I am running the server with the "-d" flag, so I should see all available logs live, I think.
/Oskar
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Today's Topics:
1. Re: KEA DHCPv6 server ignores relayed solicitations
(Darren Ankney)
----------------------------------------------------------------------
Message: 1
Date: Sat, 28 Oct 2023 13:40:04 -0400
From: Darren Ankney <darren.ankney at gmail.com>
To: "Kea-users at lists.isc.org" <kea-users at lists.isc.org>
Subject: Re: [Kea-users] KEA DHCPv6 server ignores relayed
solicitations
Message-ID:
<CAKabWHj7+PdYRKC=77Acan8qCDgcRQOiwu8jYb1jJjFBBua8hA at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
I don?t see any logging configured. Have a look at the logging section in documentation. There are also a couple articles about logging on kb.isc.org.
You might get some logging without logging configured but you probably want debug level logging setup to troubleshoot this problem.
On Fri, Oct 27, 2023 at 10:37 Oskar W?glund via Kea-users < kea-users at lists.isc.org> wrote:
> Hi all,
>
>
>
> I have a (hopefully) simple question. I have a KEA DHCPv6 server
> v2.0.3 running on a Ubuntu 20.04 machine. I am trying to get it to
> respond to solicitations coming via an ISC DHCPv6 relay, but I see no
> activity from my
> DHCPv6 server when the relayed solicitations arrive. Is there any
> specific configuration in KEA needed for this to work, or can I
> troubleshoot it somehow? I can see the solicitations coming in on the
> correct network device using tcpdump. Solicitations that are not
> relayed are handled correctly by the DHCPv6 server.
>
>
>
> I have a very basic configuration where this issue is happening that I
> am
> attaching:
>
>
>
> *{*
>
> * "Dhcp6": {*
>
> * "server-id": {*
>
> * "type": "LL",*
>
> * "persist": false*
>
> * },*
>
> * "interfaces-config": {*
>
> * "interfaces": ["enp1s0.10"]*
>
> * },*
>
> * "control-socket": {*
>
> * "socket-type": "unix",*
>
> * "socket-name": "/tmp/kea-dhcp6-ctrl.sock"*
>
> * },*
>
> * "lease-database": {*
>
> * "type": "memfile",*
>
> * "lfc-interval": 1800,*
>
> * "persist": true,*
>
> * "name": "/var/run/kea/dhcp6.leases"*
>
> * },*
>
> * "expired-leases-processing": {*
>
> * "reclaim-timer-wait-time": 10,*
>
> * "flush-reclaimed-timer-wait-time": 25,*
>
> * "hold-reclaimed-time": 3600,*
>
> * "max-reclaim-leases": 100,*
>
> * "max-reclaim-time": 250,*
>
> * "unwarned-reclaim-cycles": 5*
>
> * },*
>
> * "renew-timer": 375,*
>
> * "rebind-timer": 600,*
>
> * "preferred-lifetime": 3000,*
>
> * "valid-lifetime": 4000,*
>
> * "subnet6": [*
>
> * {*
>
> * "subnet": "fd80:501:ffff:100::/64",*
>
> * "pools": [*
>
> * {*
>
> * "pool": "fd80:501:ffff:100::10:1-fd80:501:ffff:100::10:FF"*
>
> * }*
>
> * ],*
>
> * "interface": "enp1s0.10"*
>
> * }*
>
> * ]*
>
> * }*
>
> *} *
>
>
>
> Thank you,
>
> Oskar
>
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