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Date:      Mon, 18 Mar 2002 19:39:00
From:      Greg Oshiro <goshiro@compuserve.com>
To:        jester@panix.com, scott@smnolde.com
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re[2]: Problem with dhclient
Message-ID:  <20020319034134.9354237B402@hub.freebsd.org>

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This is my first reply to the list, so please let me know of any screw-ups.=
..

Try:

kill <dhclient pid>
dhclient -1

After connecting to the "new" network

I think the -1 option causes dhclient to attempt obtaining a lease.
I don't use DHCP, so I can't test it.


Thanx,

goshiro@compuserve.com
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From: Jesse Sheidlower <jester@panix.com>
To: Internet Mail::["Scott M. Nolde" <scott@smnolde.com>]
cc: Internet Mail::[freebsd-questions@FreeBSD.ORG]
Subject: Re: Problem with dhclient
Date: 3/18/02 3:37 PM

On Mon, Mar 18, 2002 at 02:11:56PM -0500, Scott M. Nolde wrote:
> Jesse Sheidlower(jester@panix.com)@2002.03.18 14:07:36 +0000:
> > =

> > I'm running FreeBSD on a laptop computer, and in general I'm pretty
> > ignorant about networking issues. I'm having some difficulty using
> > the dhclient program and was hoping someone could give me a hand.
> > =

> > After booting, if I'm plugged into a network with a DHCP server on
it,
> > I can run dhclient and get assigned everything I need and be
> > connected. However, if I move the computer from one DHCP network to
> > another without shutting it down, I cannot seem to get new networking
> > information. If I don't touch anything, the previous settings stay
in
> > place (whether I had previously been using dhclient, or had manually
> > configured for a static network); when I try to run dhclient I get
the
> > message "ifconfig: icotl (SIOCAIFADDR): File exists" (and no other
> > ouput), and running "ifconfig" shows no inet configuration, though
I
> > do get a "status: active" line under fxp0 (my Ethernet card). Bringing
> > fxp0 down and up has no effect.
> > =

> > I've run through a number of experiments, and all I can say is that

> > rebooting the machine _always_ allows me to successfully configure
> > using dhclient. I've looked through the various man pages for =

> > dhclient and its related scripts and conf files, and looked online
> > for advice, and haven't seen anything useful.
> > =

> > Any ideas? It's something of a pain to have to reboot the computer
> > every time I move it.
> > =

> > Thanks,
> > =

> > Jesse Sheidlower
> > <jester@panix.com>
> =

> Did you try killing the dhclient process and then rerunning it again
at
> the new location? =


Yes, I did. It had no effect--I got the same result of the "File
exists", though after I had killed the dhclient process, it had to
churn for a while before it returned me to a shell prompt. (I should
mention that after rebooting, I also get the "File exists" message,
but this is followed by a bunch of address assignments, not by a
shell prompt.)

> You could also remove the inet address from the nic
> using ifconfig and then running dhclient.

After the usual process, the ifconfiguration I have is without
an inet address, but I did try to manually assign a bogus
address and then run dhclient and it didn't work.

Once again, by rebooting I was able to run dhclient and get
an address assigned.

Thanks....Hope I can work this out.

Jesse Sheidlower
<jester@panix.com>

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