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000238_news@newsmaster….columbia.edu _Mon Jun 29 14:36:22 1998.msg
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From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: 'Receive window Full' message
Date: 29 Jun 1998 18:36:17 GMT
Organization: Columbia University
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In article <3597929E.36F3@belgium.ncr.com>,
ghuylebr <geert.huylebroeck@belgium.ncr.com> wrote:
: we are using Kermit as file-transfer mechanism in the following
: environment
:
: The clients dialin to a TerminalServer from within a Powerbuilder
: application (which contains some
: kermit code)
: From the Terminal Server, there's automatically a Rlogin-session started
: to a UNIX server where a script
: starts kermit in Server Mode
:
: On the server, we run C-Kermit 6.0.192
:
: Most of the time the clients can transfer files without a problem
: But still, rather often, the clients need to resend the data because the
: connection with the (kermit) server
: dropped.
:
: We took some networktraces (captured received and send data at the
: server side) and found that, when the connection
: drops, the Kermit Server sent the message 'Receive window Full'
:
: Can anyone help us to debug what goes wrong ??
:
The best way to deal with bugs and problems in Kermit software is to send
a report by email to kermit-support@columbia.edu.
"Receive window full" can happen when the two sides get out sync, which
in turn is likely to happen when one side is restarted without the other's
knowledge.
"Receive window full" is a real error, and a real cause for failure. You
can guard against it, and recover from it, with proper script programming
techniques -- always test every important for failure and take appropriate
action if failure is detected, as described in Chapters 17-19 of "Using
C-Kermit".
Certain "Receive window full" conditions, however, were improperly diagnosed
in C-Kermit 6.0, and these problems are fixed in C-Kermit 6.1. So I'd
recommend you try it and see if there is some improvement:
http://www.columbia.edu/kermit/ck61.html
: How can we influence the speed between the UNIX server (where kermit is
: started in Receive mode) and the Terminal Server ?
: (= a TCP/IP connection) ?
:
Performance tuning is the subject of "Using C-Kermit", Chapter 12. Various
types of connections -- such as yours (serial to terminal server, then TCP/IP
to host) are discussed throughout the book.
- Frank