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From: ray@ssl-macc.co.uk (Ray Saxton)
Newsgroups: net.lan
Subject: Re: thin Ethernet advice wanted
Message-ID: <362@ssl-macc.co.uk>
Date: Thu, 21-Aug-86 13:00:17 EDT
Article-I.D.: ssl-macc.362
Posted: Thu Aug 21 13:00:17 1986
Date-Received: Fri, 22-Aug-86 06:50:08 EDT
References: <436@svax.cs.cornell.edu> <210@pwcs.UUCP> <3654@hplabsb.UUCP>
Reply-To: ray@ssl-macc.co.uk (Ray Saxton)
Organization: Software Sciences Ltd, Macclesfield, UK
Lines: 32


 We have a site with 16 suns and 2 vaxes, and have been running thinnet
with 3Com boxes for about a year now with no major problems. Each office
has several "barrel" connectors available for hooking in transceivers as
required. Although 3 floors of the building were wired as a single 
segment of some 200 mtrs, it has been found prudent to trim this as 
transfers between the end nodes were not 100% reliable. We have therefore 
bypassed , or just plain ignored, some 30% of the net and now have no 
problems.
	I say that we have no problems now , but starting up was a pain.
Firstly loose connections proliferated, despite having professionals in to
do the job. As suggested preformed cables would cure this one . Secondly
and more annoyingly was the reaction of both DEC and SUN "engineers"
on seeing the thinnet. That won't work. Thats not 10mtrs ....on and on and on
they went.We still have the state where VAX A runs a H4000 into the net
and works, Vax B runs an H4000 into the net and works to some sites .
This is blamed on the thinnet by both sets of Engineers, despite tests 
that proved that cable length did not affect the ability of certain sites
to communicate nor  the inability of the others to communicate . We have
finally resolved the problem by hooking the VAxes via Delni and then hooking
that into the despised thinnet via the good H4000. My only worry is
what happens if that H4000 goes to meet its forefathers.
  
  




-- 
	Ray Saxton    ray@uk.co.ssl-macc  UK PSS 2342 672500104
		      mcvax!ukc!dcl-cs!sslvax!ray
	Telephone +(44) 625 29241