Can't receive DHCP response [SOLVED]

krigstask · Last edited by krigstask on Fri May 18, 2007 12:01 pm; edited 1 time in total

Good daytime

I've got a problem with DHCP in my network, while using Gentoo.
At first, when I started to install using Minimal Installation CD, all went good, network was detected at startup as it should be (sometimes I had to run net-setup script). After I have installed system, something went wrong.
While booting, system tells that dhcpcd couldn't get any proper respond from DHCP-server.
I tried other DHCP-clients (udhcpc and dhclient), but with no success. All of them I tried to run via commandline with various keys I could imagine to be useful. The result is the same server doesn't respond.
After that, I tried to boot from the very same CD I have installed system from (guess I hardly could change something there), thinking of some kernel misconfiguration etc. But even its dhcpcd couldn't establish connection with server! Neither while startup, nor via net-setup, nor manually (# dhcpcd eth0).
If I try to feed net-setup with info I got in WinXP from DHCP-server (IP, subnet mask, DNS etc), it worked. But the same in installed system gives no result, even if I copy /etc/conf.d/net and /etc/resolv.conf configured by net-setup to HD.
I've decided to try another CD and got a Kubuntu one. And its DHCP-client (dhclient) works! I brought eth0 down (tried to ping local servers no pings), then run dhclient (without any arguments, keys or options) from Konsole and it reached server (pings start coursing)
I'm almost sure the problem isn't in my kernel because it was there and I hope I fixed it (dmfe module for Davicom cards now is compiled in solidly).

Here's some info

ifconfig eth0:

impulze · Posted: Tue Feb 27, 2007 12:09 pm Post subject:

check for CONFIG_PACKET in your kernel configuration
if you compiled access through /proc/config.gz into your kernel you could check with

krigstask · Posted: Tue Feb 27, 2007 12:18 pm Post subject:

Thanks for reply, impulze

impulze · Posted: Tue Feb 27, 2007 12:21 pm Post subject:

For now i don't know what's causing it. Is it possible to get the exact error you're getting when trying to receive a dhcpoffer?
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krigstask · Posted: Tue Feb 27, 2007 12:50 pm Post subject:

Here're error messages I get:

dhcpcd -d eth0:

krigstask · Posted: Wed Feb 28, 2007 7:03 pm Post subject:

I've just tried Gentoo 2006.1 LiveCD and its dhcpcd works with my DHCP server all right \-:E
Still, Minimal CD and installed Gentoo can't establish connection )-:E

:summoning_kind_gurus:

(-:E

krigstask · Posted: Tue Mar 06, 2007 2:09 pm Post subject:

A little bit more logic: LiveCD's dhcpcd refuses to work now too \-8E

As nobody can help me, I'd wait for 2007.0 release, probably those CDs will be able to deal with my dhcp-server properly...

antipod · Posted: Fri Mar 09, 2007 6:14 am Post subject:

I hope you've got it to work now but anyway, I have a similar problem. For me my network works when using dhcpcd version 2.0.5-r1 (I guess it works with all 2.* versions) but if updating to version 3.* it will time out similar to your problem.

I know I can just mask those newer versions but still, I want it to work. Anyway, this might be your problem as well, so try to

UberLord · Posted: Fri Mar 09, 2007 10:07 am Post subject:

Does dhcpcd-3 work if you specify a leasetime?

I have one report of linksys wireless AP's not working with dhcpcd-3 over WPA unless a leasetime is requested. The odd thing is it works on the same AP if WPA is not used (ie WEP, nothing works fine).
_________________
Use dhcpcd for all your automated network configuration needs
Use dhcpcd-ui (GTK+/Qt) as your System Tray Network tool

krigstask · Posted: Mon Mar 12, 2007 9:20 pm Post subject:

Ooops... Swedish people... My nick'd been understood #-:E
antipod
I used (ehm... tried to use) exactly dhcpcd 2.0.5-r1 \-:E

krigstask · Posted: Wed May 09, 2007 6:07 am Post subject:

2007.0 seems to solve this weird problem

Su8l1me · n00b Joined: 25 Jan 2006 Posts: 31

I gave dhcpcd a timeout of 60 seconds when this started happening to me - seemed to solve the issue.

krigstask · Posted: Fri May 18, 2007 11:18 am Post subject:

Su8l1me
It seems to be clue! (-:E
But could you tell, how timeout should be set for net.eth0?

UberLord · Posted: Fri May 18, 2007 11:21 am Post subject:

If using dhcpcd then you can do this

dhcpcd_eth0="-t 60"
_________________
Use dhcpcd for all your automated network configuration needs
Use dhcpcd-ui (GTK+/Qt) as your System Tray Network tool

krigstask · Posted: Fri May 18, 2007 12:00 pm Post subject:

Thanks, UberLord!
I'll try it, if it won't work, I'll re-rename this thread again
:marking_thread_as_SOLVED: