Date: Sat, 27 Sep 1997 20:48:11 -0400 (EDT) From: Chris <chris@ferraro.net> To: questions@freebsd.org, brian@awfulhak.org Subject: Re: PPP problems Message-ID: <Pine.BSF.3.96.970927204353.9653A-100000@athena.ferraro.net>
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On Sat, 27 Sep 1997, Brian Somers wrote:
> > Occasionally, PPP traffic just stops. PPP won't pass any traffic. The
> > routing tables do not change. The problem occurs randomly. Outgoing ping
> > traffic simply is not returned, but does not return a message (ie. no
> > route to host). I can ping other systems on my local network and myself
> > without problems.
I have noticed that it occurs much more often under high traffic, when the
traffic is traveling to many different sites/addresses.
> [perfectly fine routing table deleted]
>
> Does the connection close ?
No, I am sure the line is still active.
> I've seen ppp doing this once or twice, for no reason. Everything
> seems to "hang", and a short while later things are fine again. I
> haven't treated it as a potential problem yet 'cos I consider such
> things to be potential "glitches" with my ISP.
>
> If it's happening reasonably consistently for you, you'll need to
> diagnose it a bit more - there are instructions now in section 10 of
> the FAQ on how to do this.
I was unable to find anything about diagnosis under section 10 of the FAQ
on www.freebsd.org. Of course, I could easily have missed it.
No traffic is going out the link. I determined this by sending ping
packets to a Win95 machine that was connected to the Internet. I was able
to ping it and watch the green modem light light when I was not having a
problem. Then I waited until the link wasn't functioning and pinged the
Win95 system again. The modem lights stayed red, indicating no activity.
However, if I attempt to access a web page on my system from another
Internet connected computer, I see the IP in the netstat -n output
with the words "SYN_SENT" next to it. The status never changes to
ESTABLISHED. This seems to indicate that traffic is entering the link.
I just tried to upgrade to the Sept 24th release of PPP, but I couldn't
get it to compile
I ended up with:
ld: -ldes: no match
*** Error code 1
Stop.
*** Error code 1
Stop.
>
> You'll probably need to "set log +tcp/ip" in addition, but you only
> need do this while the connection is "pausing". Set yourself up a
> script:
>
> #! /bin/sh
> val=+
> test ."$1" = .off && val=-
> exec pppctl -p mypasswd 3000 set log ${val}tcp/ip
I tried using this script, but I couldn't figure out where the logging
information went. I check /var/log/messages, but there is nothing
indicating any logging is taking place.
> You can then find out if the traffic is actually going out or not.
> Of course if you have an external modem, you can probably just look
> at the TX light.
I have an internal modem.
>
>--
>Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <bri@OpenBSD.org>
> <http://www.Awfulhak.org>;
>Don't _EVER_ lose your sense of humour....
Thank you,
Chris
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