Problems with DHCPDECLINE with no IP Conflicts

Kevin Darcy kcd at daimlerchrysler.com
Tue Jan 31 23:02:50 UTC 2006


JoelSeph wrote:

>I am running bind v 3.0.2 for a statically assigned dhcp configuration.
> I have a php-mysql interface that I use to build the dhcpd config file
>and restart the dhcpd process.  Host MAC addresses are assigned
>addresses with the fixed address directive in dhcpd.conf.  I am running
>into a lot of DHCPDECLINE entries in the log files.  Hosts are
>continuously rejecting and re-requesting addresses.
>
>Upon changing addresses, the hosts appear to be fine, but some end up
>with the same problem after a few days.  Upon checking for ARP entries
>after changing the addresses, I don't see another MAC using the
>address, and the ARP entry will remain with the proper user's MAC until
>it times out and is automatically flushed by our border router.
>
>I first suspected that the problem was being causesd by
>/var/db/dhcpd.leases being empty, but then after researching I found
>that fixed address assignments are not stored in the leases file, which
>makes sense.  I understand that DHCPDECLINE messages originate from the
>host thinking the address is already in use..  What would cause this?
>
Sounds like a DHCP problem, not a DNS/BIND problem...

                                                                         
            - Kevin




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