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000047_news@newsmaster….columbia.edu _Mon Sep 21 10:07:25 1998.msg
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From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Can't get a transfer to work efficiently over a connection with a LanRover in-between.
Date: 21 Sep 1998 14:07:24 GMT
Organization: Columbia University
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In article <6u43q3$fn2$1@ash.prod.itd.earthlink.net>,
Mr. Scott <montgomery@starfleet.org> wrote:
: Using kermit on AIX.
: Dial into a LanRover, then use the lanrover's telnet command to get to
: another Unix box.
: When attempting to transfer a file from my local machine to the remote, I
: get tons of timeout errors,
: unless I bump the packet-length down to its minimum of 12 (with 4 windows).
: It seems like there is a flow-control problem, but I have been unsuccessful
: in explaining/fixing this problem.
: Does anybody have a suggestion?
:
Flow control is certainly a likely suspect. The LAN Rover port and the
modem that is connected to it should be set to use some form of flow control,
and moreover the SAME form of flow control, and for maximum effectiveness and
transparency, this should be hardware (RTS/CTS) flow control. There is
nothing you can do about the LAN Rover's modem, but there might be a command
available at the LAN Rover's prompt to let you check and perhaps alter its
communication parameters.
The same kind of flow-control problem might also be occuring between your
local computer and its own modem.
Second, some terminal servers are simply broken with respect to uploads.
These are the ones that are disigned under the mistaken assumption that the
vast preponderance of data flow will be TO the terminal, rather than FROM it.
I do not suspect a transparency problem at the LAN Rover, since if that were
the case, shortening your Kermit packets would make no difference at all.
All of these issues are discussed at length in "Using C-Kermit". These
discussions should help you home in on the problem and solve it.
The current version of C-Kermit, by the way, is 6.0:
http://www.columbia.edu/kermit/ck60.html
- Frank