From owner-freebsd-hackers  Fri Dec  8 11:15:27 1995
Return-Path: owner-hackers
Received: (from root@localhost)
          by freefall.freebsd.org (8.7.3/8.7.3) id LAA08235
          for hackers-outgoing; Fri, 8 Dec 1995 11:15:27 -0800 (PST)
Received: from asstdc.scgt.oz.au (root@asstdc.scgt.oz.au [202.14.234.65])
          by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id LAA08223
          for <hackers@freebsd.org>; Fri, 8 Dec 1995 11:15:16 -0800 (PST)
Received: (from imb@localhost)
	by asstdc.scgt.oz.au (8.7.3/BSD4.4)
	id GAA27321; Sat, 9 Dec 1995 06:14:41 +1100 (EST)
From: michael butler <imb@scgt.oz.au>
Message-Id: <199512081914.GAA27321@asstdc.scgt.oz.au>
Subject: Re: User space PPP & leased line
To: mnewell@lupine.nsi.nasa.gov (Michael C. Newell)
Date: Sat, 9 Dec 1995 06:14:41 +1100 (EST)
Cc: hackers@freebsd.org
In-Reply-To: <Pine.SUN.3.91.951208112808.17619E-100000@lupine.nsi.nasa.gov> from "Michael C. Newell" at Dec 8, 95 11:34:00 am
X-Mailer: ELM [version 2.4 PL24beta]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-hackers@freebsd.org
Precedence: bulk

Michael C. Newell writes:

> We tried using the user mode PPP on our systems for a while, but under
> very heavy load after 2-3 minutes the line ALWAYS dropped.  No indication
> of what caused it.  We use the identical setup with the kernel PPP (pppd)
> and run for days with no line drops.

This is most likely the result of dropping LCP echo packets on a busy line.
Try adding ..

 disable lqr
 deny lqr

 .. to the 'default' section of /etc/ppp/ppp.conf.

It does not seem to work if placed elsewhere :-(

> We DID have to set up a bunch of scripts to make sure the kernel mode 
> doesn't lock up and to do redialing ('cause we've never been able to get 
> pppd to redial on its own).

Hardly surprising since kernel mode ppp has no demand-dial capability :-)

	michael