On Mon, 22 Aug 1994 17:20:40 EST I said, in part ...
> Scenario 2 - ADSM Netware ... client ... communicating with a VM
> server using TCP/IP over a 1.5Mb/s (T1) network with ... routers ...
>
>   Typical results: The ADSM client reports a 13-20KB/s rate. This is
>   only about 10% of the 1.5Mb/s (T1) pipe.
...
> 2. The 10 Mb/s netware machine seems to have a transfer rate 40-75
> times that of the 1.5 Mb/s machines.  Except for one additional router, I
> can't account for the difference.  I would have expected a 6-10 times
> difference.

Our network gurus have been watching and playing with our network
since I posted these data.  The 1.5Mb/s link sits between 10Mb/s end
links and the router(s) in between were having troubles dropping
(relatively many) packets.  The problem may have occurred or be
exacerbated by our VM TCP/IP advertising a relatively large window size
(32K).

Last night we changed one of the routers from hardware to processor
switching to bypass the drops.  We obtained a 2 to 5 times improvement
in ADSM reported transfer rate.  Now our Netware ADSM client reports
about 100KB/s ... much closer to what we expected the comm gear (T1) to
handle.

It's such great fun answering my own questions :-)

cheers,

Wayne T. Smith
Systems Group -- CAPS        internet: wts AT maine.maine DOT edu
University of Maine System   BITNET/CREN: WTS@MAINE