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Date:      Mon, 14 Dec 1998 14:01:17 -0600
From:      "Jaime Bozza" <wheelman@nuc.net>
To:        "Brian Somers" <brian@Awfulhak.org>, "Dmitry Valdov" <dv@dv.ru>
Cc:        <current@FreeBSD.ORG>
Subject:   RE: cvs commit: src/usr.sbin/ppp ip.c (fwd) 
Message-ID:  <000001be279c$82ba9540$313d31cc@electron.nuc.net>
In-Reply-To: <199812141909.TAA04535@keep.lan.Awfulhak.org>

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> You say that with debug enabled, ppp thinks everything's ok.  Does
> this mean that ppp is reporting the modem carrier status as being
> ``online'' ?
>
> If this is the case, then I suspect a hardware failure - it's
> unlikely that the sio driver would report carrier if there isn't
> any.... all it's doing is an inb() when it's given an
> ioctl(,TIOCMGET,).

While I haven't done much debugging in this area, (haven't had a lot of
time recently), I have two systems that started having the same problem
once I upgraded from 2.2.7-stable to 2.2.8-stable.  (I know these
aren't -current, but the merge of the ppp code was brought over for 2.2.8)

The first system I upgraded is using an Adtran ISDN "modem" connected
through a serial port.  The system was working perfectly for about 15
months (since installation) until I upgraded the box to 2.2.8-stable.  Now,
when the line is dropped, ppp doesn't "see" the carrier lost and just sits
there.  For a quick fix, I just wrote a script that resets ppp if it can't
ping a known server on our end.

At first I thought it could be hardware failure until I updated another
2.2.7-stable box to 2.2.8-stable.  (This one is using a USR Courier V.90
modem and has been working fine for about a year.)  When the same thing
happened (modem dropped carrier, ppp didn't pick it up) I started to think
it wasn't a hardware failure.  It's unlikely that both of these systems
started failing at the same time, especially when the problem happened
immediately after upgrading to 2.2.8-stable.

Regardless, I'd be happy to run specific debug logs and send them to you if
you want.

Jaime Bozza
Nucleus Communications, Inc.


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