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From: rsmith@vms.macc.wisc.edu (Rusty Smith, MACC)
Newsgroups: comp.protocols.tcp-ip,comp.dcom.lans
Subject: Re: When is an ethernet full?
Message-ID: <3718@dogie.macc.wisc.edu>
Date: 29 May 90 18:42:25 GMT
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In article <1141@cica.cica.indiana.edu>, ssw@cica.cica.indiana.edu (Steve 
Wallace) writes...

> 
>When is an ethernet full?  We have a campus backbone composed of a
>chipcom  10 Mbs ethernet over broadband and a UB 5 Mbs ethernet over
>broadband (buffered repeaters).  The UB and chipcom networks are bridged
>to form one logical networks.  According to our Network General sniffer, 
>we constantly maintain about 10-15 percent utilization or (300 - 1000
>packets per second).   How much more traffic can this network support
>before performance falls off measurably?  Any ideas?  
>

We have a similar setup here. There are about 50 Chipcom's connected to
our broadband backbone. All but 3 are coupled to DEC Lanbridges to
keep local traffic local. We have had similar 1 minute averages and
peaks of 3-4 times as much. As far as we can tell everyone is 
satisfied with the performance with these numbers. We have had
other performance problems not caused by traffic volume.

Rusty Smith			Internet:  rsmith@vms.macc.wisc.edu
MACC Data Communications	Bitnet:    rsmith@wiscmacc
(608)  263-6307			Univ. of Wisconsin @ Madison