SOLVED?: Re: ppp problem with 2.2.X kernel; ok with 2.0.36
I had limited success improving the ppp performance (stalling after a very short
transfer) by removing the call to bsd_comp.o in
/lib/modules/2.2.13/net/modules.dep, so I tried the implied suggestion below:
another ISP which, hopefully, didn't use Ascend routers using the lame ...
STAC/MS-STAC/LZ-anything compression. I was using Concentric. Got a new
account, and voila! It works great (so far). Will have to try for a few days
before I decide it's fixed.
Is it true that there is some incompatibility between the new ppp modules and
these compression methods?
Michael Heyes
_
Re: Resolved: Poor PPP performance in 2.2.x
Matthias Andree ([EMAIL PROTECTED])
Thu, 25 Feb 1999 23:59:06 +0100
On Thu, Feb 25, 1999 at 04:43:08PM -0600, Stephen Foskett wrote:
Why were so few people seeing the problem? Perhaps my ISP (Concentric.net)
uses this compression module and many others don't. Perhaps many others
have disabled this module. Perhaps it's something about the system yet...
Many ISP use Ascend dial-in routers which support only the lame ('coz
proprietary) STAC/MS-STAC/LZ-anything compression which Linux-ppp does
not support, while the Ascend cannot be fitted with PPP-Deflate or
BSD-Compress either. :-(
I'd really like to see compatibility with this Ascend compression to
speed up general connection throughput, while not using strange
squid-ssh-hacks. I bugged the dialin-admin at Dortmund University quite
a bit, he finally gave up on Ascend, he said there was nothing he could
do while he really would like to. Not sure if bugging the Deutsche
Telekom AG will help, since they seem to support only Windows as
well.
--
Matthias Andree
Robert Varga [EMAIL PROTECTED] on 11/09/99 02:09:43 PM
To: Brian Servis [EMAIL PROTECTED]
cc: Mike Heyes/LincolnFP/[EMAIL PROTECTED],
debian-user@lists.debian.org
Subject: Re: ppp problem with 2.2.X kernel; ok with 2.0.36
On Tue, 9 Nov 1999, Brian Servis wrote:
*- On 9 Nov, [EMAIL PROTECTED] wrote about ppp problem with 2.2.X kernel;
ok with 2.0.36
I had a slink system with 2.0.36 kernel, and wanted to update to 2.2.X
kernel. I
updated the suggested packages listed on the debian page that discussed
known
issues, and then updated the kernel. No problems with that. Netscape seemed
to
work ok, but when I tried to download any packages, it would only download a
small amount of data and stall. I thought it might be a problem with packets
not
clearing.
So, since that page said all these problems were cleared up in unstable, I
upgraded to potato with apt-get dist-upgrade. Same problem. But, if I use
the
2.0.36 kernel, downloads are fine.
I recompiled the 2.2.X kernel to make sure I have ppp support, and couldn't
see
anything else that might cause this in the kernel config menu. I'm doing
something wrong, but what? Ideas / suggestions?
I had similiar problems as well. Check the debian-user list archives
for other discussions on this topic. If I recall correctly the thing
that helped me was to simply play around with the mru and mtu options
for pppd. Currently I have each set at 552. I think the defaults are
1500. Unfortunately I can't seem to recall where I got my info on
settings for the mru/mtu values.
ppp needs to be upgraded pppconfig as well, I think.
the ppp/isdn part of the kernel has been reorganized, hence the need for
the new versions.
Robert Varga
Re: ppp problem with 2.2.X kernel; ok with 2.0.36
I had upgraded both ppp and pppconfig when I upgraded from slink to potato, but
I checked and I do have the latest versions. I tried changing the mtu and mru
settings per Brian's suggestions without success either. I did come across the
two postings below that seemed to describe my problem exactly. So first I
removed the call to bsd_comp.o from /etc/conf.modules but that didn't help. Then
I tried moving /lib/modules/2.2.13/net/bsd_comp.o to a temp directory called
/lib/modules/2.2.13/netNov10.
The connection works great now! No stalls and the transfer rate is fine. But
why? My slink system also had a version of bsd_comp.0 in with
/lib/modules/2.0.36/net. The file size of the 2.0.36 version is smaller (5440 vs
5744 bytes), so maybe there are some problems in the new version? I will try
moving the old version to /lib/modules/2.2.13/net and see if things still work.
I'd really like to understand what's going on, though.
__
Resolved: Poor PPP performance in 2.2.x
Stephen Foskett ([EMAIL PROTECTED])
Thu, 25 Feb 1999 16:43:08 -0600
The problem briefly was that I was getting stalls or something over ppp
with the 2.2.x kernels. PPP would stop responding, and an RX error would
appear in ifconfig ppp0, every few seconds. Also, a strange bunch of hex
numbers appeared in /var/log/syslog.
I determined that the problem was caused by the bsd_comp module! I turned
it off in /etc/conf.modules and the problem vanished. It looks like there
may be something wrong with this module. I intend to go back through the
kernels until I can find what in that module changed in order to figure
this all out.
Why were so few people seeing the problem? Perhaps my ISP (Concentric.net)
uses this compression module and many others don't. Perhaps many others
have disabled this module. Perhaps it's something about the system yet...
Anyway, at least PPP is working now!
Stephen
Re: Resolved: Poor PPP performance in 2.2.x
Matthias Andree ([EMAIL PROTECTED])
Thu, 25 Feb 1999 23:59:06 +0100
On Thu, Feb 25, 1999 at 04:43:08PM -0600, Stephen Foskett wrote:
Why were so few people seeing the problem? Perhaps my ISP (Concentric.net)
uses this compression module and many others don't. Perhaps many others
have disabled this module. Perhaps it's something about the system yet...
Many ISP use Ascend dial-in routers which support only the lame ('coz
proprietary) STAC/MS-STAC/LZ-anything compression which Linux-ppp does
not support, while the Ascend cannot be fitted with PPP-Deflate or
BSD-Compress either. :-(
I'd really like to see compatibility with this Ascend compression to
speed up general connection throughput, while not using strange
squid-ssh-hacks. I bugged the dialin-admin at Dortmund University quite
a bit, he finally gave up on Ascend, he said there was nothing he could
do while he really would like to. Not sure if bugging the Deutsche
Telekom AG will help, since they seem to support only Windows as
well.
--
Matthias Andree
Robert Varga [EMAIL PROTECTED] on 11/09/99 02:09:43 PM
To: Brian Servis [EMAIL PROTECTED]
cc: Mike Heyes/LincolnFP/[EMAIL PROTECTED],
debian-user@lists.debian.org
Subject: Re: ppp problem with 2.2.X kernel; ok with 2.0.36
On Tue, 9 Nov 1999, Brian Servis wrote:
*- On 9 Nov, [EMAIL PROTECTED] wrote about ppp problem with 2.2.X kernel;
ok with 2.0.36
I had a slink system with 2.0.36 kernel, and wanted to update to 2.2.X
kernel. I
updated the suggested packages listed on the debian page that discussed
known
issues, and then updated the kernel. No problems with that. Netscape seemed
to
work ok, but when I tried to download any packages, it would only download a
small amount of data and stall. I thought it might be a problem with packets
not
clearing.
So, since that page said all these problems were cleared up in unstable, I
upgraded to potato with apt-get dist-upgrade. Same problem. But, if I use
the
2.0.36 kernel, downloads are fine.
I recompiled the 2.2.X kernel to make sure I have ppp support, and couldn't
see
anything else that might cause this in the kernel config menu. I'm doing
something wrong, but what? Ideas / suggestions?
I had similiar problems as well. Check the debian-user list archives
for other discussions on this topic. If I recall correctly the thing
that helped me was to simply play around with the mru and mtu options
for pppd. Currently I have each set at 552. I think the defaults are
1500. Unfortunately I can't seem to recall where I got my info on
settings for the mru/mtu values.
ppp needs to be upgraded pppconfig as well, I think.
the ppp/isdn part of the kernel has been reorganized, hence the need for
the new versions.
Robert Varga
Re: ppp problem with 2.2.X kernel; ok with 2.0.36
*- On 9 Nov, [EMAIL PROTECTED] wrote about ppp problem with 2.2.X kernel; ok with 2.0.36 I had a slink system with 2.0.36 kernel, and wanted to update to 2.2.X kernel. I updated the suggested packages listed on the debian page that discussed known issues, and then updated the kernel. No problems with that. Netscape seemed to work ok, but when I tried to download any packages, it would only download a small amount of data and stall. I thought it might be a problem with packets not clearing. So, since that page said all these problems were cleared up in unstable, I upgraded to potato with apt-get dist-upgrade. Same problem. But, if I use the 2.0.36 kernel, downloads are fine. I recompiled the 2.2.X kernel to make sure I have ppp support, and couldn't see anything else that might cause this in the kernel config menu. I'm doing something wrong, but what? Ideas / suggestions? I had similiar problems as well. Check the debian-user list archives for other discussions on this topic. If I recall correctly the thing that helped me was to simply play around with the mru and mtu options for pppd. Currently I have each set at 552. I think the defaults are 1500. Unfortunately I can't seem to recall where I got my info on settings for the mru/mtu values. HTH, -- Brian Servis -- Mechanical Engineering | Never criticize anybody until you Purdue University | have walked a mile in their shoes, [EMAIL PROTECTED] | because by that time you will be a http://www.ecn.purdue.edu/~servis | mile away and have their shoes.
Re: ppp problem with 2.2.X kernel; ok with 2.0.36
On Tue, 9 Nov 1999, Brian Servis wrote: *- On 9 Nov, [EMAIL PROTECTED] wrote about ppp problem with 2.2.X kernel; ok with 2.0.36 I had a slink system with 2.0.36 kernel, and wanted to update to 2.2.X kernel. I updated the suggested packages listed on the debian page that discussed known issues, and then updated the kernel. No problems with that. Netscape seemed to work ok, but when I tried to download any packages, it would only download a small amount of data and stall. I thought it might be a problem with packets not clearing. So, since that page said all these problems were cleared up in unstable, I upgraded to potato with apt-get dist-upgrade. Same problem. But, if I use the 2.0.36 kernel, downloads are fine. I recompiled the 2.2.X kernel to make sure I have ppp support, and couldn't see anything else that might cause this in the kernel config menu. I'm doing something wrong, but what? Ideas / suggestions? I had similiar problems as well. Check the debian-user list archives for other discussions on this topic. If I recall correctly the thing that helped me was to simply play around with the mru and mtu options for pppd. Currently I have each set at 552. I think the defaults are 1500. Unfortunately I can't seem to recall where I got my info on settings for the mru/mtu values. ppp needs to be upgraded pppconfig as well, I think. the ppp/isdn part of the kernel has been reorganized, hence the need for the new versions. Robert Varga
