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From: lcrosby@ALMSA-1.ARPA (Linda Crosby)
Newsgroups: mod.protocols.tcp-ip
Subject: TCP-IP/ETHERNET QUESTION
Message-ID: <8611201134.AA23624@ucbvax.Berkeley.EDU>
Date: Wed, 19-Nov-86 14:11:40 EST
Article-I.D.: ucbvax.8611201134.AA23624
Posted: Wed Nov 19 14:11:40 1986
Date-Received: Thu, 20-Nov-86 22:43:30 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
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Approved: tcp-ip@sri-nic.arpa


     I am in the process of establishing a TCP/IP network that will
run on Broadband ethernet.  The prototype installation will consist of
4 mainframe computers (VAX 780) and 8 or 16 users using IBM-PC clones.  The
highwater mark could be as many as 8 mainframe computers and 400 IBM-PC
clone users.

     I would like to know if 400 users, as described above, running the
standard suite of DOD protocols (TCP/IP, TELNET, FTP, SMTP) can be
supported on a single ethernet ?  How many connections would be
reasonable before the network begins to degrade ?  Is anyone familiar
with a broadband ethernet, similar to what we are proposing, that is
configured with 400 connections ?  Is this reasonable ?

     I would like to here from anyone who has covered this ground
before.  A successfull installation elsewhere would be a big
confidence builder.

Linda J. Crosby
Technical Liaison
ALMSA-1
(LCROSBY@ALMSA-1)