[net.lan] Anybody running Ethernets between buildings?

gamiddleton@thunder.UUCP (Guy Middleton) (10/30/85)

We will be putting in an ethernet soon; it may have to span several
buildings.  I had heard that this may present problems.  I would like to
hear from people who have multi-building ethernets, so I know what kind of
chance I am taking.
-- 
	Guy Middleton, Lakehead University, Thunder Bay, Ont.
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smoot@im4u.UUCP (Mitchell) (11/03/85)

We run our rather large ethernet between several buildings  here at
the University of Texas without a major problem.   Currently we have
a backbone cable running between the CS department and the Computation
Center.  This cable spans three buildings.  Off of this cable we run
several other ethernet cables connected by repeaters and remote
repeaters to several other buildings on campus.  This configuration
kind of stretches the original intent of an ethernet, but seems to 
work fairly well.  Eventually we plan to install a broadband backbone
cable between the buildings and use ethernets within single buildings
only.

I have heard of ground potential problems with running the cable between 
buildings.  So far we have experienced no problems with ground loops
or other such nasty phenomena.  

kotter@muscat.UUCP (Rich Kotter) (11/08/85)

> We will be putting in an ethernet soon; it may have to span several
> buildings.  I had heard that this may present problems. 

You may want to look at a new product announced by DEC called LAN Bridge 
100 that allows you to connect multiple ethernets together. They can be
electrically isolated with a fiber optic link up to 2000 meters, traffic
that is local to one ethernet does not get sent to the other ethernet unless
that's where the destination is, to the systems it looks like one big
ethernet, and you can link up to seven ethernets with bridges. It is also
protocol independent.


-- 

Rich Kotter 	decvax!decwrl!muscat!kotter

steve@umd-cs.uucp (Steven M. Miller) (11/14/85)

>Organization: DEC Western Region Operations, Santa Clara, CA

>> We will be putting in an ethernet soon; it may have to span several
>> buildings.  I had heard that this may present problems. 

>You may want to look at a new product announced by DEC called LAN Bridge 
>100 that allows you to connect multiple ethernets together. They can be
>electrically isolated with a fiber optic link up to 2000 meters, traffic
>that is local to one ethernet does not get sent to the other ethernet unless
>that's where the destination is, to the systems it looks like one big
>ethernet, and you can link up to seven ethernets with bridges. It is also
>protocol independent.

>Rich Kotter 	decvax!decwrl!muscat!kotter


Free advertising on the net again...


Bridge also has a similar product, and I don't believe it's limited
to 2000 meters either.

			-steve

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