how to get F12 to 'send host-name' in dhcp request?

[M. Milanuk]

On 12/17/2009 2:47 AM, Tom Horsley wrote:
> On Wed, 16 Dec 2009 21:29:46 -0800
> M. Milanuk wrote:
>
>> Can someone help me out here?  This is driving me nutty.  How do I make
>> F12 send the right request to the dhcp server?
>
> Every distro seems to do this differently (sometimes each distro
> changes between releases :-), but for fedora/redhat what has
> always worked for me is to edit the ifcfg-eth0 script
> and add:
>
> DHCP_HOSTNAME="whatever"
>
> to the parameters.
>


Hello Tom,

Thanks for the help.  I took a look in that script, and I see what 
you're talking about.  I may end up going that route in the end, or just 
editing the dnsmasq.conf file on the server to use dhcp-client-id 
instead of dhcp-host.

In the mean time, its still bugging me as to what exactly is going on 
here.  On further inspection, the /var/run/nm-dhclient-eth0.conf files 
for both the F12 machine and the U9.10 machine are nearly the same they 
*both* have Network Manager adding the same line to the end ('send 
dhcp-client-identifier "demandred" '), but the file in U9.10 looks like 
they just copied over /etc/dhcp3/dhclient.conf (which they still have) 
into the NM file, with one line uncommented:

	send host-hame "<hostname>";

I don't know if that gets expanded when the script is run to take the 
machines hostname and send it as part of the dhcp request, and thats why 
it gets the proper dhcp lease as it should, and F12 doesn't?

 From the sounds of things, it appears I'm going to have to learn a bit 
about wireshark and start trying to capture the network traffic when the 
client machines send their dhcp requests and see what is and isn't being 
sent.

Thanks,

Monte