Date: Sun, 24 May 1998 00:06:48 +0100 From: Brian Somers <brian@Awfulhak.org> To: tom@inna.net Cc: Brian Somers <brian@Awfulhak.org>, julian@whistle.com, freebsd-current@FreeBSD.ORG Subject: Re: **HEADS UP** user-ppp has changed ! Message-ID: <199805232306.AAA27547@awfulhak.org> In-Reply-To: Your message of "Sat, 23 May 1998 13:31:22 EDT." <19980523133121.44909@tyger.inna.net>
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> On Sat, May 23, 1998 at 01:34:57PM +0100, Brian Somers wrote:
> > > did you test it against mpd?
> >
> > Anyway, the upshot of it all is that YES, PPP TALKS TO MPD OK (first
> > time too), but I have the following observations to make about mpd
> > (Archie cc'd):
>
> I've been using MPD for 9 months now on a 24x7 4modem link to my house and
> I have one observation to make that may or may not be helpfull.
>
> MPD is horrible about handling losing a link which means I turn off 3 modems
> whenever it rains because it can redial and reconnect faster then it can
> handle losing a link. Lose one of 4 modems and it takes usually 2
> minutes to start sending packets again. Whats worse is the phonelines are
> bad enough to where under a good heavy file transfer I'll lose a modem on one
> particular line every few minutes.
>
> I'm using 2 freebsd 2.2.2 boxes running mpd 1b4. its a backwards setup which is
> why I dont just dial into my termservers. Its local call from work to home
> but at the time I installed it all it was not a local call back and dialout
> lines are still cheaper at the office then home.
>
> I never had a chance to do anything constructive about solving it so I never
> mentioned it before... was just happy that it worked at all :-)
Well, give ppp a try :-) Ppp should deal with link losses pretty
well - in fact I was testing that today. When a link goes down, you
don't really notice as ppp will only sequence data when a link
starves - therefore when a link goes down, only a single fragment
goes missing from the data stream. This translates to a single
packet (unless you have a link weight greater than the bundle MMRU)
which TCP et al are fairly good at dealing with. This works with
compression turned on too - at both the MP layer and the link layer.
You can also have your auto links coming up and down on demand based
on your needs - check the autoload options in the man page, not to
mention adding and removing links on-the-fly......
> --
> -------------------------------------------------------------------------
> - Tom Arnold - the sunrise in the east every morning in my dreams, i -
> - SysAdmin - turn the music on and start to dance with all my friends-
> - TBI, Ltd - the sun shines on my way every night and every day and -
> -------------- takes the sorrows far away, so far away. -- X-Perience -
--
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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