> Thanks,
>
> I plan to use the ppp stack in the linux as a dial-up server. The
> compression is used between
> the dial-up server and the dial-up modems, not in the WAN.
OK, this should match.
> The Microsoft Point-to-Point compression (MPPC) is mentioned in the CCP (RFC
> 1962). The
> reason I implement it is to support Windows 95/98/NT platform. Are you
> saying that
> Stac-LZS and Predictor compression are supported on those platfroms too ?
I just know that Stac-LZS is supported under M$ W*s, I don't know anything
about Predictor (it should be supported on Cisco, though).
> How about
> MPPC ? When you enable the software compression in the dial-up networking in
> those
> platform, actually what kind of compression it will use. I enable the debug
Compression can be negotiated separately in each direction of the link.
COMPRESSOR sends REQUEST, DECOMPRESSOR selects ONE algorithm and sends
ACKNOWLEDGE.
> option in the
> pppd and found out that MPPC (CCP option 12), BSD (option 21, bsd_comp.c)
> and MVRCA (type 24)
> and Deflat (type 26) are negotiated. Somehow the negotiation failed and ppp
> can not
> support Windows platform compression for now unless I did it wrong.
That's weird, BSD and Deflate should be compatible. Do you have (although
it is pretty obvious and posted already 100 times on this list)
in /etc/modules.conf (or /etc/conf.modules, depending on installation)?:
alias ppp-compress-21 bsd_comp
alias ppp-compress-26 ppp_deflate
alias ppp-compress-24 ppp_deflate
> I know that Cisco router support MPPC too.
Then sorry, I was just told by friend at ISP that only Predictor and Stac are
supported on Cisco, I haven't tried it personally.
> James
Bye, Lace
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