Subject: Re: ath0 spontaneously binding to a channel?
To: David Young <>
From: Steven M. Bellovin <>
List: tech-net
Date: 11/09/2006 17:19:10
On Thu, 9 Nov 2006 13:56:25 -0600, David Young <> wrote:

> On Thu, Nov 09, 2006 at 02:28:20PM -0500, Steven M. Bellovin wrote:
> > Twice in the last few weeks, my ath0 interface was somehow bound to a
> > channel when running dhclient.  Needless to say, it did not succeed in
> > finding an AP until I reset it to 'chan -1'.  Should I just add that to
> > the ifconfig attributes in my dhclient.conf file?  Why is this happening
> > to start with?
> What do you mean by "bound to a channel" ?
I did 'ifconfig ath0'; it showed a channel but no carrier.  It didn't seem
to matter what the channel was.  I tried repeatedly to restart dhclient,
suspend/resumed, etc., to no avail.  In both cases, I was able to restore
functionality by by doing 'ifconfig ath0 chan -1'.

		--Steven M. Bellovin,