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Date:      Sun, 5 Mar 2000 06:32:45 +0100 (MET)
From:      hm@hcs.de (Hellmuth Michaelis)
To:        nox@jelal.kn-bremen.de (Juergen Lock)
Cc:        kuku@gilberto.physik.RWTH-Aachen.DE, freebsd-isdn@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG
Subject:   Re: ijppp for isdn, ppp compression, and netgraph (also: load balancing)
Message-ID:  <20000305053245.84D2336AB@hcswork.hcs.de>
In-Reply-To: <200003042243.XAA82879@saturn.kn-bremen.de> from Juergen Lock at "Mar 4, 0 11:43:07 pm"

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From the keyboard of Juergen Lock:

>  And the other reason i'm looking at ijppp is ppp compression.  It
> currently supports deflate (rfc1979) and predictor1 (rfc1978), which
> should at least help if the other end is running bsd or linux,
> but if your other end is something like an ascend or an external
> router (zyxel, cisco(?), there are probably more that speak this
> protocol), you'd want stac lzs (rfc1974), or if its a wintendo box
> even you'd want M$' special version of that (yes of course they
> invented their own `standard' again.)  So my question is, is
> anyone working on this?  There is (alpha) code that does this on
> linux,
> 
> 	http://www.ibh-dd.de/~beck/stuff/lzs4i4l/

I've looked at that. Its very Linux-centric and i gave up for the moment
when i realized how much work it would be to port it.

Brian's ppp over i4b does support deflate compression and i get very
good results out of it - too good to put more work into the above URL.

> today...  impressive stuff.)  and is someone working on linking i4b
> and netgraph?

There will be a netgraph node interface which will link an i4b B-channel
to netgraph. There are no plans from my side to netgraphify the D-channel
part of i4b.

> that seems to be the logical way to do more complex
> stuff like this aodi thing that e.g. the german Telekom wants to use
> for their low-bandwidth 10 DEM/month isdn `flatrate' which they plan to
> introduce around the end of the year.  (and _if_ this really works it
> sure will become pretty popular over here as long as all the other `real'
> flatrates are still in the 100 DEM or more range... :/ )  this seems to
> be the current draft:

- this "flatrate" will only be available to T-Online customers. Since i'm
  not such a beast and will probably never become one its of not much use
  for me.

- my usage of the internet is not much compatible with what this "flatrate"
  offers.

- the Telecom does not give away anything for free. Check when, why and
  most important how you are using the internet: the savings you get using
  this "flatrate" does not pay even a fraction of the time and work needed
  to implement this - in my eyes.

Anyway, i will happily accepting (clean) code which implements it :-)

hellmuth
-- 
Hellmuth Michaelis                                    Tel   +49 40 55 97 47-70
HCS Hanseatischer Computerservice GmbH                Fax   +49 40 55 97 47-77
Oldesloer Strasse 97-99                               Mail  hm [at] hcs.de
D-22457 Hamburg                                       WWW   http://www.hcs.de


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