From owner-freebsd-net Mon Aug 20 5:15:10 2001 Delivered-To: freebsd-net@freebsd.org Received: from Awfulhak.org (gw.Awfulhak.org [217.204.245.18]) by hub.freebsd.org (Postfix) with ESMTP id C905A37B41B for ; Mon, 20 Aug 2001 05:15:04 -0700 (PDT) (envelope-from brian@Awfulhak.org) Received: from hak.lan.Awfulhak.org (root@hak.lan.Awfulhak.org [fec0::1:12]) by Awfulhak.org (8.11.5/8.11.5) with ESMTP id f7KCErv11033; Mon, 20 Aug 2001 13:14:53 +0100 (BST) (envelope-from brian@Awfulhak.org) Received: from hak.lan.Awfulhak.org (brian@localhost [127.0.0.1]) by hak.lan.Awfulhak.org (8.11.4/8.11.4) with ESMTP id f7KCEjU81471; Mon, 20 Aug 2001 13:14:45 +0100 (BST) (envelope-from brian@hak.lan.Awfulhak.org) Message-Id: <200108201214.f7KCEjU81471@hak.lan.Awfulhak.org> X-Mailer: exmh version 2.5 07/13/2001 with nmh-1.0.4 To: Len Conrad Cc: freebsd-net@FreeBSD.ORG, brian@freebsd-services.com Subject: Re: taking ppp down and up In-Reply-To: Message from Len Conrad of "Mon, 20 Aug 2001 13:56:46 +0200." <5.1.0.14.0.20010820135141.03ec8de0@mail.Go2France.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Date: Mon, 20 Aug 2001 13:14:45 +0100 From: Brian Somers Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org > >WRT the PPPoE lockup problem, I'd love to get to the bottom of this > >(I can't reproduce it here). If anybody can give me an account on a > >machine that locks up like this, I'd gladly have a crack at trying to > >solve the problem. > = > we are not sure we have the ppp lockup, but we certainly have the "FT l= ockout". > = > We are willing to give you an ssh account, but when we=B4re down ..... = :)) > = > Do you have any ideas WRT, from POV of the PPP machine, how to distingu= ish = > between local ppp lockup vs ppp ok but remote nexthop dead? I think monitoring the network for PPPoE traffic should say whether = or not the local end is dead (no traffic =3D=3D local death). ``tcpdump = -i iface -l not ip'' should do it. Assuming there's no traffic, it may be necessary to install a modified = netgraph module - one that logs when it's setting up and triggering = timeouts. I did this some time ago here, but could never get = anything to lock up :( I've been told that ``killall -11 ppp'' or = attaching to ppp with gdb just shows ppp in select() (as expected), = but it may be worth confirming this too. I can only guess that the problem is due to netgraph mis-processing = some rogue data from the other side (data I can't reproduce here 'cos = I'm using netgraph). To this end, it may even be worth running = tcpdump permanently on the link (with -x) so that we can get a look = at the dodgy data. > Len > = > = > http://MenAndMice.com/DNS-training > http://BIND8NT.MEIway.com : ISC BIND 8.2.4 for NT4 & W2K > http://IMGate.MEIway.com : Build free, hi-perf, anti-abuse mail gatewa= ys -- = Brian http://www.freebsd-services.com/ Don't _EVER_ lose your sense of humour ! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message