Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!uunet!fernwood!synopsys!johnc
From: johnc@synopsys.com (John Crossley)
Newsgroups: comp.protocols.appletalk
Subject: Re: Macs on Network freezing momentarily
Message-ID: <593@synopsys.COM>
Date: 1 Nov 90 16:17:02 GMT
References: <9010310928.aa26366@sappho.ux.King.AC.UK> <1990Oct31.152709.26732@athena.mit.edu>
Sender: news@synopsys.com
Organization: Synopsys Inc.
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We have just received a Webster Multigate AppleTalk Router.  In 
Appendix B they show the impact of losing packets on the network.
AppleShare servers have a 10 to 20 second timeout while waiting 
for TREL packets (no, I'm not sure what those are either!).  This 
is fine if only one TREL packet is missing.  "If two occur during 
a 30 second period, AppleSahre will stall until 30 seconds have 
elapsed since the first missing TREL.  In these instances, a 1% 
packet error rate translates a 2 second task into a 12 to 22 
second one -  approximately an 85% slowdown."

Their solution to this situation is to keep your network short 
and keep the wires away from electrical interference.  

Hope this helps.

John