Uprade to 7.04

[Ted Moore]

Thanks for your reply.  I could not get any responses using the chatroom.  I
am using two network cards; one to the school setup and the other to the
outside world.  My outside world address is 192.168.0.100 and my school
setup uses dhcp 10.0.0.20 - 10.0.0.250.
When my thin clients do connect they all seem to be starting at 10.0.0.250
and counting down.  Does that provide any additional info you can help me
with?

-----Original Message-----
From: edubuntu-users-bounces at lists.ubuntu.com
[mailto:edubuntu-users-bounces at lists.ubuntu.com] On Behalf Of Gavin
McCullagh
Sent: Sunday, May 06, 2007 10:36 AM
To: edubuntu-users at lists.ubuntu.com
Subject: Re: Uprade to 7.04


On Sun, 06 May 2007, tedmoore99 at satx.rr.com wrote:

> I am running a small (12 terminals) system and have recently upgraded 
> to 7.04.  Before upgrading the 12 terminals would connect in about 3 - 
> 5 minutes.  Since the upgrade, only about three terminals come up in 3 
> minutes.  The rest seem to hang up and I have to reboot several times. 
> After about one hour or more, all the terminals will eventually 
> connect. Is there something about 7.04 that I am unaware of that might 
> cause this behavior.  The messages I get from the non-connecting 
> terminals is "Searching for DHCP", then "NO IP", repeated many times.

Strange, it sounds like your DHCP clients are not getting a response from
the server.  That's sort of strange, particularly if you're using PXE
network booting (which would imply you had already got a response from the
dhcp server once).

To check what's happening, you can run tcpdump somewhere on the network (say
on the server) as the machine boots up.  You should be able to see requests
and responses.  This command will do that for you:

	sudo tcpdump -i eth0 | grep DHCP

assuming eth0 is the network interface the dhcp is happening on.

One thing that has happened to me a few times is that where there are two
network cards in a machine, the PXE network card boots up and does the first
DHCP, at which point the linux kernel comes up and attempts to get its IP
address by DHCP on the other network card.  It might be worth checking you
only have one network card.

Gavin


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