Date: Wed, 15 Apr 1998 00:34:12 +0100 From: Brian Somers <brian@Awfulhak.org> To: brian@litzinger.com Cc: Capriotti <capriotti@geocities.com>, freebsd-questions@FreeBSD.ORG Subject: Re: PPP ADVANCED ISSUES Message-ID: <199804142334.AAA22946@awfulhak.org> In-Reply-To: Your message of "Tue, 14 Apr 1998 14:05:29 PDT." <19980414140529.B12460@top.worldcontrol.com>
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> On %M 0, Capriotti <capriotti@geocities.com> wrote:
> > Hello, again.
> >
> > >From time to time, my connection with my ISP goes bad, lowering the
> > response time and even the speed for the data flow.
> >
> > Is there a way to instruct PPP or PPPD to
> > discnnect and reconnect in case of bad thruoghput ?
>
> I don't know about the implementation in FreeBSD, but PPP has a
> protocol called LQR (link quality report). Some PPP implementations
> can be configured to drop the connection and reconnect if the LQR
> reports are below a certain threshold. However, they directly
> address lost data rather than slow data. However, LQRs which
> don't respond in time can count against a slow connection.
User-ppp has only one LQM strategy - if we haven't had a reply to the
last 5 LQRs (or ECHO LQRs), we drop the link instead of sending a 6th.
I may implement more strategys in the multilink version.
The problem is that it seems that a lot of ISPs will just REJ
QUALPROTO LCP requests, so we're stuck using ECHO LQRs which are
useless for determining a bad link :-(
> I could also envision a script which pings the ISP side of the interface.
> If the times come back too slow, you could kill off the PPP session
> and spawn another.
Once it's been determinted that the link needs to be recycled,
a simple ``pppctl -p xxx myport down\; dial'' will do the trick.
> --
> Brian Litzinger <brian@litzinger.com>
--
Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <brian@OpenBSD.org>
<http://www.Awfulhak.org>;
Don't _EVER_ lose your sense of humour....
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