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Date:      Thu, 11 Jan 1996 22:22:08 -0700
From:      Nate Williams <nate@sri.MT.net>
To:        "Michael C. Newell" <mnewell@lupine.nsi.nasa.gov>
Cc:        hackers@FreeBSD.org
Subject:   Re: pppd vs ijppp
Message-ID:  <199601120522.WAA23433@rocky.sri.MT.net>
In-Reply-To: <Pine.SUN.3.91.960111224658.14135B-100000@lupine.nsi.nasa.gov>
References:  <Pine.BSF.3.91.960111170343.10344C-100000@schizo.cdsnet.net> <Pine.SUN.3.91.960111224658.14135B-100000@lupine.nsi.nasa.gov>

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Michael C. Newell writes:
> On Thu, 11 Jan 1996, Jaye Mathisen wrote:
>   1.  Someone (Nate?) was working on installing predictor-1 compression into
>       kernel ppp.  Is this available for alpha/beta testing?  

Nope.  I got a predictor-1 module from the Linux author which is
*extremely* Linux-centric.  It also has some patent problems with the
CRC algorithm it uses (which is why it's not distributed publically), so
I hope to use it as a basis for bringing into our pppd, using the
predictor-1 module out of ijppp.

Based on my work-load and my lack of free time, I don't expect to have
anything for a couple weeks minimum.  My first priority for FreeBSD is
to look at the PCCARD patches which are supposed to be release RSN.

>   2.  Has there been any progress in making ijppp a tad more stable?

Doug Rabson posted that he was working on the code, and Poul just fixed
a couple minor bugs.

[ kernel ppp more robust than user ppp ]

> But... while [ user-ppp ] WAS up I got REALLY REALLY REALLY good
> throughput; due, I understand, to predictor-1.  So... 

Yep.

> I'd REALLY like to see predictor-1 added to the kernel mode PPP.  I don't
> need dialers etc. (although the "connect" command on kernel ppp coupled
> with chat does a nice job for me...) Then I could have a nice solid ppp
> WITH compression.  Happy happy joy joy! 

That's my goal as well.

> If the person doing the predictor-1 stuff needs help/testers, please 
> lemme know!! :-)

If you think you could do the work, I could send you the module.
However, I'm not allowed to post it publically.

> BTW- One other nice thing would be to add to the kernel ppp man page the
> hint that one should NEVER use the proxyarp command [other hint:  never
> say never... :-)].  I had all kinds of bizzarre problems (mostly with
> pppd's not going away) 'till I removed it per the suggestion of someone
> from the list; instantly things started working well!  :-)! 

It's a bug in FreeBSD handling of external ARP, and not a bug in PPP.
Unfortunately, I'm now kernel hacker and none of the network gurus are
interested in helping me fix the problem. :(



Nate



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