Date: Mon, 20 Aug 2001 13:14:45 +0100 From: Brian Somers <brian@Awfulhak.org> To: Len Conrad <LConrad@Go2France.com> Cc: freebsd-net@FreeBSD.ORG, brian@freebsd-services.com Subject: Re: taking ppp down and up Message-ID: <200108201214.f7KCEjU81471@hak.lan.Awfulhak.org> In-Reply-To: Message from Len Conrad <LConrad@Go2France.com> of "Mon, 20 Aug 2001 13:56:46 %2B0200." <5.1.0.14.0.20010820135141.03ec8de0@mail.Go2France.com>
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> >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 lockout". > > We are willing to give you an ssh account, but when we´re down ..... :)) > > Do you have any ideas WRT, from POV of the PPP machine, how to distinguish > 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 == 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 gateways -- Brian <brian@freebsd-services.com> <brian@Awfulhak.org> http://www.freebsd-services.com/ <brian@[uk.]FreeBSD.org> Don't _EVER_ lose your sense of humour ! <brian@[uk.]OpenBSD.org> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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