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Date:      Wed, 22 Mar 2006 20:41:59 -0600
From:      Paul Schmehl <pauls@utdallas.edu>
To:        freebsd-net@freebsd.org
Subject:   Re: Loopback problem
Message-ID:  <450528E72F6DEFD144E3DA9D@Paul-Schmehls-Computer.local>
In-Reply-To: <A5A58960103487150DDE62BA@Paul-Schmehls-Computer.local>
References:  <A5A58960103487150DDE62BA@Paul-Schmehls-Computer.local>

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--On March 22, 2006 7:43:31 PM -0600 Paul Schmehl <pauls@utdallas.edu>=20
wrote:

> I have two machines (that I know of) that have the same problem.  The
> loopback interface has no ipv4 address, and it doesn't start up on boot.
> If I bring the interface up (ifconfig lo0 up),. it has no ipv4 address.
> If I bring it up this way - ifconfig lo0 inet 127.0.0.1, then I have an
> ipv4 address and everything works fine.
>
> On box is 5.4 SECURITY.  The other is 6.0 SECURITY.  Both boxes have
> ifconfig=3D"lo0 inet 127.0.0.1" in the /etc/defaults/rc.conf file.  Both
> boxes boot fine and work fine, except for this one problem, which has
> manifested odd symptoms from time to time but never merited investigation
> (until now.)
>
> Since I did the installs on both boxes, I've obviously missed something
> during the install (or chosen the wrong option).  Does anyone have a clue
> what it might be?  Or how I might fix this problem so the boxes will
> bring up lo0 at boot?
>
I just figured out the problem with one box.  (The other is down right now, =

so I can't get to it.)  For some reason the following was in /etc/rc.conf=20
(I don't know if that was done by setup or some other program):

network_interfaces=3D"l0 xl0 xl1"

I changed that to:
network_interfaces=3D"lo0 xl0 xl1"

and now the box activates lo0 on boot, including the ipv4 address.

I'll have to check the other box tomorrow morning.

Paul Schmehl (pauls@utdallas.edu)
Adjunct Information Security Officer
University of Texas at Dallas
AVIEN Founding Member
http://www.utdallas.edu/
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