Clients not recieving IP's via DHCP

Rudy Zijlstra rudy at
Thu Feb 8 08:29:52 UTC 2007

Tim Philips wrote:
> Hi All,
> [sorry for the lengthy e-mail below]
> I'm trying to diagnose a very weird problem for a client.  They several
> Windows Vista clients on their network and they are having problems
> obtaining an IP address via DHCP (all other Windows XP and Linux clients
> are working fine).
> To try and diagnose this outside of the clients production network I
> have managed to replicate the problem in my personal network using my
> XBOX and Nintendo Wii (based on the information below) (all other Linux,
> Mac OSX and Windows clients work like a charm).
> The ISC DHCP version is 3.0.1-58.EL4 (installed from RPM on CentOS 4.4).
> The basic configuration for the DHCP server is as follows:
> server-identifier router;
> option domain-name-servers;
> option routers;
> option subnet-mask;
> option broadcast-address;
> default-lease-time 7200;
> max-lease-time 50000;
> ignore client-updates;
> ddns-update-style none;
> next-server;
> authoritative;
> subnet netmask {
>         range;
> }
> host xbox {
>         hardware ethernet 00:0D:3A:4E:F4:DA;
>         fixed-address;
> }
> When I enable DHCP on the XBOX and bring up the clients Ethernet
> interface I see the following (as example) loops 12 times in the
> messages file:
> Feb  8 18:28:37 thinktank1 dhcpd: DHCPDISCOVER from 00:0d:3a:4e:f4:da
> via eth0
> Feb  8 18:28:37 thinktank1 dhcpd: DHCPOFFER on to
> 00:0d:3a:4e:f4:da via eth0
> There is no firewall between the XBOX and the DHCP server.
> I have put another client (Linux) on the network and executed tcpdump
> and I don't see anything coming back from the client after the DHCPOFFER
> has been sent.  Looking on several mailing lists and google (and
> friends) it indicates that the client may be expecting some additional
> options that the DHCP server isn't sending but I can't for the life of
> me figure out what.
> I have downloaded a Win32 DHCP client and installed that on a spare
> Windows XP computer and right away the client was able to obtain an IP
> address from the DHCP server, so I'm picking I have miss configured
> something with the options for the given clients under ISC. I have even
> attempted to set a static IP address on the client (which works fine).
> Any clues that would help me solve the problem would be much appreciated!
> Cheers ;)
When you are sniffing the DISCOVER packets, take a look at which options 
the client is requesting, and which options are offered by the server. 
That might give you a clue.

You can also compare with the OFFER made by the Win DHCP server.



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