DHCP server does not update DNS
dhcp1 at thehobsons.co.uk
Thu Dec 22 07:57:37 UTC 2011
Richard Allen wrote:
>However I did have a
>thought while reading up on the interim method. Here is a quote from the
>dhcpd.conf man page:
> In addition to these differences, the server also does not update
>very aggressively. Because
> each DNS update involves a round trip to the DNS server, there
>is a cost associated with
> doing updates even if they do not actually modify the DNS
>database. So the DHCP server
> tracks whether or not it has updated the record in the past (this
>information is stored on
> the lease) and does not attempt to update records that it thinks it
>has already updated.
Yes, that's what Glenn mentioned.
>Now, I don't know how to read the leases file, but is there any chance dhcpd
>thinks the client has already registered and thus does not try to do it again?
It's not in the lease you quoted. If a DNS update has already been
done, then you'll see entries for (from memory) something like
"ddns-hostname" and "ddns-<something-else>"
>I really wish there was an option to make dhcpd aggressive with it's DNS
That won't help while you have your current problem.
Just a thought ...
The Windows machines, are they managed via AD and group policies ?
I'm just wondering if there's something in that that's overriding the
DHCP options ?
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