client refuses to accept offer

[Glenn Satchell]

Looks like you have the interactions with the other dhcp servers sorted 
out ok then.

Can you run wireshark (or similar) on the client to see what it is 
receiving and sending? It may be that the dhcp offer is not making it to 
the client, or perhaps a dhcp option is missing in the offer? Similarly 
a packet trace on the server to look at the contents of the packets 
(tcpdump, wireshark, snoop, etc).

regards,
-glenn

On 05/12/10 13:38, anctop wrote:
> On 12/05/2010, Glenn Satchell<glenn.satchell at uniq.com.au>  wrote:
>> Have you tried uncommenting authoritative?
>
> Yes, but no help.
>
>> Be careful if all these dhcp servers operate on the same subnet. The
>> client may be getting responses from more than just your dhcp server.
>
> As far as I know, the other servers reject "unknown" hosts, and my
> test client is "unknown" to them.
>
>> The client may also be sending a dhcpdecline, which you're ignoring.
>
> I've tried commenting out "deny declines;", but no help.
>
> Regards,
> anctop
>
>
>> regards,
>> -glenn
>>
>> On 05/12/10 13:13, anctop wrote:
>>> I'm new to DHCP. My system is Linux 2.6.30.2, connected to a network
>>> which already has some DHCP server(s) running.
>>> I have a few static IP addresses in hand which I'm allowed to use, and
>>> I want to create my own DHCP server.
>>> I've built and installed dhcp-4.1.1 on my system. As a first step, I
>>> tried to assign a fixed address for a particular computer. My
>>> dhcpd.conf is :
>>>
>>>> option domain-name "yyy.zzz";
>>>> option domain-name-servers 147.8.2.2;
>>>>
>>>> default-lease-time 3600;
>>>> max-lease-time 14400;
>>>>
>>>> deny unknown-clients;
>>>> deny bootp;
>>>> deny declines;
>>>> deny client-updates;
>>>> deny leasequery;
>>>>
>>>> # authoritative;
>>>>
>>>> boot-unknown-clients false;
>>>>
>>>> log-facility local1;
>>>>
>>>> subnet 147.8.108.0 netmask 255.255.255.0 {
>>>> }
>>>>
>>>> host x099 {
>>>>     hardware ethernet 00:0C:F1:D1:16:78;
>>>>     fixed-address 147.8.108.99;
>>>>     option host-name "x099";
>>>>     option routers 147.8.96.1;
>>>>     option subnet-mask 255.255.255.0;
>>>> }
>>>
>>> I start the server on the foreground (dhcpd -4 -d), then connect the
>>> client (running WinXP SP3) to the network. There're many console
>>> messages, here are the relevant ones :
>>>
>>>> May 12 10:16:27 xxx dhcpd: Internet Systems Consortium DHCP Server 4.1.1
>>>> May 12 10:16:27 xxx dhcpd: Copyright 2004-2010 Internet Systems
>>>> Consortium.
>>>> May 12 10:16:27 xxx dhcpd: All rights reserved.
>>>> May 12 10:16:27 xxx dhcpd: For info, please visit
>>>> https://www.isc.org/software/dhcp/
>>>> May 12 10:16:27 xxx dhcpd: Wrote 0 deleted host decls to leases file.
>>>> May 12 10:16:27 xxx dhcpd: Wrote 0 new dynamic host decls to leases file.
>>>> May 12 10:16:27 xxx dhcpd: Wrote 0 leases to leases file.
>>>> May 12 10:16:27 xxx dhcpd: Listening on
>>>> LPF/eth0/00:11:2f:53:aa:49/147.8.108.0/24
>>>> May 12 10:16:27 xxx dhcpd: Sending on
>>>> LPF/eth0/00:11:2f:53:aa:49/147.8.108.0/24
>>>> May 12 10:16:27 xxx dhcpd: Sending on   Socket/fallback/fallback-net
>>>> May 12 10:16:32 xxx dhcpd: DHCPDISCOVER from 00:0c:f1:d1:16:78 via eth0
>>>> May 12 10:16:32 xxx dhcpd: DHCPOFFER on 147.8.108.99 to 00:0c:f1:d1:16:78
>>>> via eth0
>>>> May 12 10:16:35 xxx dhcpd: DHCPDISCOVER from 00:0c:f1:d1:16:78 via eth0
>>>> May 12 10:16:35 xxx dhcpd: DHCPOFFER on 147.8.108.99 to 00:0c:f1:d1:16:78
>>>> via eth0
>>>> May 12 10:16:44 xxx dhcpd: DHCPDISCOVER from 00:0c:f1:d1:16:78 via eth0
>>>> May 12 10:16:44 xxx dhcpd: DHCPOFFER on 147.8.108.99 to 00:0c:f1:d1:16:78
>>>> via eth0
>>>
>>> It appears that the client does not accept the DHCPOFFER and asks for
>>> one repeatedly until it gives up. The same problem for other "host"
>>> declarations.
>>>
>>> How can this be fixed ?
>>>
>>> Regards,
>>> anctop