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000180_news@columbia.edu_Mon Oct 23 15:25:58 1995.msg
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1995-12-25
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From: rchishol@iiic.ethz.ch (Rory Alexander Chisholm)
Newsgroups: comp.protocols.kermit.misc
Subject: Problems with Ckermit over local network.
Date: 23 Oct 1995 15:25:58 GMT
Organization: Dept. Informatik, Swiss Federal Institute of Technology (ETH), Zurich, CH
Lines: 36
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Apparently-To: kermit.misc@watsun.cc.columbia.edu
I'm having problems using ckermit over out local network. My setup is this:
I have ckermit running on my sparcstation at home which I use to connect at
19200 to my USR dual HST modem. I then set up a V32 connection to our
university dial-in (with data compression). The dial-in is to an annex, from
which I use "telnet" to connect to a local machine, I then log in and start
ckermit on the remote machine to start a file transfer. My problems now include:
On connect Ckermit switches the speed back from 19200 to 9600, how can I prevent
this (my modem reports a connect at 9600 yes, but this is NOT what I want).
More seriously, while transfer over ckermit works fine over the default
settings (default packet length, window size etc). I seem to be able to
increase the send (receive) packet length only to 256 bytes without problems.
More accurately if I am down loading files then I chose send packet length of
256 for the remote and the same for the local end receive packet length. The
window size I set to 8 and leave the rest alone. This appears to work, any
packet length higher than 256 (512, 1024 etc) seems to give me major problems
with NAK/timeout (yes I did set the block check to 3). So my questions are
1) any bright ideas about what could be causing this ? I don't think its
line noise (since this is a v32/v42 connection)
2) What would be a better set of parameters (currently I achieve something
like 30% throughput)
Last but not least I use ckermit as my primary communications software is
there any way to get the local ckermit it use an alternate protocol
(x-modem, y-modem, z-modem) providing thats available as a program that
reads from stdin for the local machine ? Sometimes this is all that is
available on the remote and it would be nice not to have to remember to use
tip, cu, seyon or a similar abomination when I have to down load to such a
destination.
Thanks for any help in advance, regards Rory Chisholm
email: rchishol@math.ethz.ch