Path: utzoo!attcan!uunet!cs.utexas.edu!swrinde!ucsd!ucbvax!ICO.ISC.COM!dougm
From: dougm@ICO.ISC.COM ("Doug McCallum")
Newsgroups: comp.protocols.tcp-ip
Subject: Re: TCP/IP AIX ==> AS/400
Message-ID: <9006271539.AA12082@violet.ICO.ISC.COM>
Date: 27 Jun 90 15:39:41 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 14

In reply to your message of 25 Jun 90 12:29:50 GMT
-------

> I would like to hear from anyone using TCP/IP between AIX 1.2 on a PS/2
> and the AS/400.  Between a PS/2 Model 80 and an AS/400 Model 50 I am getting
> about 18-21K cps under average to high load (on the 400).  Does this
> sound correct?  Any ideas for fine tuning the PS/2 end?

I haven't tried with an AS/400, but I've used the PS/2 and found that
performance has a strange asymmetry.  The PS/2 seems to send fast but
receive very slow, like 20-40Kbytes/s with the TCP on either 1.1 or 1.2 AIX.
I never looked at how to resolve it since the project I had to use AIX on
only lasted a few weeks.  My suspicion is that it is a bug in the AIX TCP/IP
ack code.