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Today's Topics:
1. Re: DHCPv6 isn't updating DNS (Joshua Schaeffer)
----------------------------------------------------------------------
Message: 1
Date: Sat, 12 Aug 2017 15:04:41 -0600
From: Joshua Schaeffer <jschaeffer0...@gmail.com>
To: Users of ISC DHCP <dhcp-users@lists.isc.org>, Philippe Cl?ri?
<phili...@gcal.net>
Subject: Re: DHCPv6 isn't updating DNS
Message-ID: <876ffcaf-4beb-e46a-500b-5c407a734...@gmail.com>
Content-Type: text/plain; charset="utf-8"
On 08/12/2017 04:51 AM, Philippe Cl?ri? wrote:
>
> I also have the same problem. In fact, I posted about it:
>
> https://lists.isc.org/pipermail/dhcp-users/2015-June/018952.html
>
> In my case though it's only the static leases. Dynamic addresses update just
> fine. Eventually I quit trying and used static records when needed. I kept
> the configuration to get some warning if/when some update has it working.
>
I ended up figuring this out. The client was not send the fqdn.fqdn. Apparently
this is required. I was using Ubuntu 16.04 and in the past this option was send
by default from dhclient, however due to bug 1604617
<https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1604617> it was no
longer being sent. The only place I could find a reference to option 39 (fqdn)
being required is in Kea's documentation
<ftp://ftp.isc.org/isc/kea/1.2.0/doc/kea-guide.html#dhcp6-ddns-config> (of
which I was trying to switch over to because of this problem). Once I manually
set fqdn.fqdn in dhclient.conf on my test client ISC DHCP updated the DNS
records. There was nothing wrong with the server setup at all.
I haven't tried updating static leases yet, as I've just being setting static
addresses on the hosts' themselves. Of course you would need the
"update-static-leases" option set to on in order to update them through DHCP.
Perhaps I just missed the sections in the man pages or in the RFC's about
requiring option 39 from the client in order to update DNS, but even if I did
its moot at this point.
Thanks,
Joshua Schaeffer
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