[comp.protocols.tcp-ip] TCP/IP AIX ==> AS/400

dougm@ICO.ISC.COM ("Doug McCallum") (06/27/90)

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