DDNS Updates fail When More Than 15 Authoritative Servers (NS records) are listed in a Dynamically Updated Zone
Chris Buxton
chris.p.buxton at gmail.com
Mon Sep 20 22:47:48 UTC 2010
It probably has something to do with the packet size. You can't easily fit 25 NS records into a 512 byte UDP packet.
You really don't want to have more than 8 published NS records for most purposes.
Chris Buxton
BlueCat Networks
On Sep 20, 2010, at 2:30 PM, Christopher Cain wrote:
> [I apologize in advance if this is a double post. I'm not sure if my original went through]
>
> I was implementing ISC Bind 9.5 at a client site last month and had a single zone that accepted DDNS updates only from the ISC DHCP service.
>
> The environment consisted of a Master BIND server and almost 25 Windows slave servers. All DNS servers were listed as authoritative at first. This caused DDNS updates from DHCP to fail with the following message:
>
> "Unable to add forward map from host.domain.com to 10.10.10.10: DNS format error".
>
> After spending quite a bit of time troubleshooting this issue with no luck, I was finally successful with DDNS updates after I reduced the number of authoritative servers for the dynamic zone to 15. Since I have done this, the issue has not resurface.
>
> Can anyone help explain to me why this happened and if there is anything I can do to avoid this from happening in the future?
>
> Thanks,
>
> Christopher Cain
> E: chris at christophercain.ca
> _______________________________________________
> bind-users mailing list
> bind-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/bind-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/bind-users/attachments/20100920/70af6417/attachment.html>
More information about the bind-users
mailing list