DHCP and Dynamic DNS
dhcp1 at thehobsons.co.uk
Thu May 8 10:20:16 UTC 2008
Roger Lestru wrote:
>We are using dhcpd and bind from ISC. Our network is spread
>geographically, and we have a number of dns and dhcp servers. Our
>dhcp servers are dynamically updating our bind primary server, with
>dhcp client updates, and that is working fine for the most part.
>The issue that we have, is when a wan link goes down, or when a
>remote dhcp server cannot contact the primary dns server, then the
>dns update fails.
>I'm wondering if there is a way around this with dhcpd? Is it
>possible to queue the dns update, or something similar?
No, there are no facilities to deal with this.
The only way I could think of doing it would be to make sure that the
primary for any zone is on the same network as the DHCP server(s)
that update it - that way at least the primary could get updated and
slaves would follow when the link was back up.
Failing that, for adding records related to a new lease, the server
will retry next time the client renews.
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