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Date:      Tue, 18 Aug 1998 08:49:31 +0200 (METDST)
From:      hm@hcs.de (Hellmuth Michaelis)
To:        gvw@brainaid.dascon.de (Guido von Walter)
Cc:        freebsd-isdn@FreeBSD.ORG
Subject:   Re: Problems with ppp and idletimeout
Message-ID:  <m0z8faF-0000dkC@hcswork.hcs.de>
In-Reply-To: <199808172033.WAA00388@void1.dascon.de> from Guido von Walter at "Aug 17, 98 10:33:50 pm"

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>From the keyboard of Guido von Walter:

> I don't know if my last mail has not reached the list, everybody was on
> holiday, the problem is too hard or the question was simply too stupid to
> be worth the hassle. Whatever the reason, I have not received a single 
> response. This is a very rare occasion on this technically excellent and
> usually very helpful list.

Usually, no response means that noone has an idea ... ;-)

> Aug 12 09:50:43 firewall /kernel: isppp0: lcp input(opened): <echo-req id=0x21 l
> en=12 22-f6-d9-74-0-6-3f-7b>
> Aug 12 09:50:44 firewall /kernel: isppp0: got lcp echo req, sending echo rep
> Aug 12 09:50:44 firewall /kernel: isppp0: lcp output <echo-reply id=0x21 len=12
> 35-d9-ec-9c-0-6-3f-7b>
> 
> every ten seconds.

In this case, the kernel part sees traffic and this means to it that it must
not hangup because something is still going on.

> I have read the recent discussion of this in the list archives, but there was
> no solution mentioned.

It seems that someone who has this problem should/must add some code
(to i4b_isppp.c and perhaps other parts) to qualify packets and give 
the kernel timeout mechanism hints, which traffic is "real" traffic
and which traffic can be safely ignored for timeout purposes.

hellmuth
-- 
Hellmuth Michaelis                                    Tel   +49 40 559747-70
HCS Hanseatischer Computerservice GmbH                Fax   +49 40 559747-77
Oldesloer Strasse 97-99                               Mail  hm@hcs.de
22457 Hamburg                                         WWW   http://www.hcs.de

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