In the ppp documentation it says that the author did some experiments with
these compression schemes, and due to the substantial computational
resources needed, it was possible to get a significant higher throughput
with the compression taking place outside the modem than if the modem
provided the compression.

karsten

----------
>From: [EMAIL PROTECTED]
>To: [EMAIL PROTECTED]
>Subject: R�f. : RE: ppp-compression-24 26 modules
>Date: Fri, May 26, 2000, 01:53
>

> Thanks for your help. I had noticed these modules, as well as slhc.o which
> has something to do with header compression, but I had not idea of which
> kernel request would match which module. Did you get these with a modprobe
> -c ? I think I tried this but did not get the aliases you mention (I have
> modutils 2.1.121, kernel 2.2.13 & pppd 2.3.10).
> Anyway I'll try that.
> BTW has anybody an idea about what performance gain can be achieved with
> these modules, given that the modems also make use of compression
> algorithms ?
>
>
>
>
>
> [EMAIL PROTECTED] le 26/05/2000 08:19:45
>
> Pour :    [EMAIL PROTECTED]
> cc :   (ccc : Eric LE BRAS/MUTUALITE)
> Objet :   RE: ppp-compression-24 26 modules
>
>
>
>
> Hope this will help.
> the defaults of the modprobe command are:
>
> alias ppp-compress-21 bsd_comp
> alias ppp-compress-24 ppp_deflate
> alias ppp-compress-26 ppp_deflate
>
>     > -----Original Message-----
>     > From: Sarel J. Botha [mailto:[EMAIL PROTECTED]]
>     > Sent: Thursday 25 May 2000 21:19
>     > To: [EMAIL PROTECTED]
>     > Subject: Re: ppp-compression-24 26 modules
>     >
>     >
>     > On Thu, May 25, 2000 at 04:50:59PM +0100, [EMAIL PROTECTED] wrote:
>     > > Whenever I connect to a ppp pear using pppd, I get in
>     > /var/log/messages
>     > > some messages saying that requested modules
>     > ppp-compression-24 and
>     > > ppp-compression-26 were not found. Though connexion
>     > succeeds, I guess IP
>     > > packets compression will be unavailable. My kernel is
>     > compiled with kmod
>     > > support, so I guess it lacks some aliases in my
>     > /etc/modules.conf file.
>     >
>     > Yea, you should have aliases to the right modules. Not
>     > sure what they are
>     > but other people on this list do.
>     >
>     > Could someone maybe put an FAQ up somewhere that we can
>     > point people to?
>     >
>
>
>
> -
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