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From: raj@hpindwa.cup.hp.com (Rick Jones)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: Strange slowness
Message-ID: <36540027@hpindwa.cup.hp.com>
Date: 3 Jun 91 01:41:09 GMT
References: <1991May30.032710.3205@usace.mil>
Organization: Hewlett-Packard, Cupertino CA
Lines: 28


There are many possibilities when it comes to networking slowness.

Obviously, slower systems talk slower. What might not be so obvious is
that sometimes faster systems end-up talking slower to slower systems
that slower systems do. When this happens you can see a large number
of retransmissions on the sending system. 

The slower system could be the destination, or perhaps an intermediate
router. Check rtxs on the Intergraph - particularly if is is equally
sow talking with other systems 'on the other side' of the PC router.

On newer TCP/IP's, things like 'fast rtx' and VJ congestion control
and avoidance can help overcome 'deficiencies' in paths (slow links,
routers, etc...) Ask your local Intergraph rep if there is 'fast rtx'
or VJ on the system. On such systems, you may still see many rtx's,
but the rates will remain higher.

If you really want to get your hands dirty, stick an analyser on
the wire(s) and trace a few conections.

More gory details can be had via email...

rick jones
___   _  ___
|__) /_\  |    Richard Anders Jones   | HP-UX   Networking   Performance
| \_/   \_/    Hewlett-Packard  Co.   | "It's so fast, that _______" ;-)
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Being an employee of a Standards Company, all Standard Disclaimers Apply