no DHCPREQUEST after DHCPOFFER
dhcp at thehobsons.co.uk
Sat May 27 09:14:53 UTC 2006
Howard Wang wrote:
>Do you know if the client made the request ?
>unfortunely no, the client is etherboot, not many information can be seen.
In that case, a packet sniffer (eg ethereal) is your friend.
>Anything else logged immediately before or after this - especially
>anything dns related ?
>nothing from /var/log/messaes
>Do you supply any different options using static address vs dynamic address ?
>the manual config does work. lets say, I specify the client MAC in dhcpd.conf,
>the server is able to get the DHCPREQUEST and then send DHCPPACK, the client
>picks the address.
AT this point I need to correct something. You talk of "the server is
able to get the DHCPREQUEST" as though this is something the server
does. The server is passive in this, if the client sends it, the
server will get it, if the client doesn't send it, there's nothing
you can do at the server end to fix this - apart from ...
figure out why the client is not accepting the offer.
Firstly, look carefully at your server config, and see if the options
send when specifying a fixed address are in any way different to
those sent when using a dynamic address. You could post your config
file here and we can take a look.
Next, you could look at the packets on the wire and see what is sent
out - compare the offer packets for the two cases and see what's
different. With ethereal installed, 'tethereal -V -f "ether host
aa:bb:cc:dd:ee:ff and (port 67 or port 68)"' should do it.
The only explanation I can see is that in the two cases, the offer
packet differ in more than just than IP address and the client is not
happy with one of them.
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