On Sat, 20 Mar 1999, Erlend Hoel wrote:
>
> On Fri, 19 Mar 1999, Gerben Welter wrote:
>
> > As of this week my isp is offering isdn compression. I've tested it under
> > Windows 98 and it is great.
>
> This sounds cool! I haven't tried to make it work for me yet (I saw the
> reply to this where the procedure is explained), but my first question is:
> How do you know if your isp supports it? Can you use compression as an
> option? (i.e. runtime detection so it only gets used if the other peer
> supports it?) What are the benefits - how good is the compression? And
> above all, if you have to ask your ISP, how do you phrase the question?
> (what kind of compression would I be referring to?)
Maybe the message I copied below gives you some answers. I use the
'MS-Stac' compression setting at my provider.
ISDN compression is negotiated, so if either side does not
support it, the link will simply be uncompressed.
After enabling compression, the following appears
in /var/log/messages when making a connection:
Mar 20 21:02:00 zap ipppd[1284]: PHASE_WAIT -> PHASE_ESTABLISHED, ifunit: 0, linkunit:
0, fd: 8
Mar 20 21:02:00 zap named[1295]: cache zone "" loaded (serial 0)
Mar 20 21:02:00 zap named[1295]: primary zone "zap" loaded (serial 9609021)
Mar 20 21:02:00 zap named[1295]: primary zone "0.0.10.in-addr.arpa" loaded (serial
9609022)
Mar 20 21:02:00 zap named[1296]: Ready to answer queries.
Mar 20 20:02:01 zap sudo: root : TTY=none ; PWD=/www ; USER=nobody ;
COMMAND=/usr/local/squid/bin/squid -b
Mar 20 21:02:03 zap ipppd[1284]: ioctl(SIOCSIFMTU): Invalid argument, 7 ippp0 1524.
Mar 20 21:02:04 zap ipppd[1284]: Remote message:
Mar 20 21:02:04 zap ipppd[1284]: MPPP negotiation, He: No We: No
Mar 20 21:02:04 zap ipppd[1284]: CCP enabled! Trying CCP.
Mar 20 21:02:04 zap ipppd[1284]: CCP: got ccp-unit 0 for link 0 (protocol: 0x80fd)
Mar 20 21:02:04 zap ipppd[1284]: ccp_resetci!
Mar 20 21:02:04 zap ipppd[1284]: ccp_resetci!
Mar 20 21:02:04 zap ipppd[1284]: [0] LZS (hists 1 check 4) compression enabled
--------------------
>From [EMAIL PROTECTED] Sun Mar 21 00:14:50 1999
Date: Sat, 20 Mar 1999 01:06:12 +0100 (CET)
From: Jelle Foks <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: ISDN stac Compression works!
Hi all,
Well, my provider recently decided to support compression, so I got 2.2.3
on my gateway (I got isdn_lzscomp.o to compile on 2.0.35, but it still
missed a bit too much code in isdn_ppp.c to make it work ("compression not
included" in the log)).
So, after upgrading to 2.2.3, I set the account on my provider to
ms-stac, started ipppd with:
/sbin/ipppd /dev/ippp0 defaultroute lzs 1:4
And I got compression:
emptyfile: 102400 bytes received in 1.15 seconds, 87.13 kB/s.
emptyfile4: 409600 bytes received in 3.04 seconds, 131.52 kB/s.
regularfile: 102400 bytes received in 0.99 seconds, 101.46 kB/s.
fullfile: 102400 bytes received in 13.34 seconds, 7.50 kB/s.
This is good.
Thanks guys. Keep up the good work.
Cya,
Jelle.
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