Subject: [rbridge] Use of the term "campus"

From: Eric.Gray at marconi.com (Gray, Eric)
Date: Thu, 22 Jun 2006 14:09:11 -0400

Joe,

	Your definition for "campus" is very close to my own
understanding, as well.  Meanwhile, we have the term "segment" 
and the term "LAN" that occasionally over-lap.

	From back in the days when I worked almost exclusively
with bridges and hubs (1989-1994), we used the term "segment"
to mean "the bit between bridges" since that was what would
be isolated if a bridged network became "segmented" (by losing
a bridge).

	Also, most people usually refer to a "LAN" as a broadcast 
domain.  Otherwise the term "VLAN" (as "Virtual LAN") becomes
excessively cumbersome to deal with.

	I admit all of these terms have overlap and ambiguity in
the rest of the world, but can we use them consistently in the
set of TRILL documents?

	I'm perfectly happy to accept the definition of "campus"
provided in the protocol specification, but then I need a new
term for "the set of rbridges that cooperate together."

--> -----Original Message-----
--> From: Joe Touch [mailto:touch at ISI.EDU] 
--> Sent: Thursday, June 22, 2006 1:59 PM
--> To: Gray, Eric
--> Cc: Radia.Perlman at sun.com; rbridge at postel.org
--> Subject: Re: [rbridge] Use of the term "campus"
--> 
--> 
--> 
--> Gray, Eric wrote:
--> > Radia,
--> > 
--> > 	I am having some trouble resolving the use of "campus"
--> > in the currently available protocol specification with the 
--> > way that it has been used in other documents, mailing list
--> > discussion, etc.
--> > 
--> > 	In the protocol specification, "campus" is defined as
--> > synonymous with the usual definition of "LAN".  Is this use
--> > central to the rest of the document?  If so, can we use the
--> > word "LAN" instead?
--> 
--> I thought:
--> 
--> 	- segment
--> 		what 802 refers to when describing an ethernet LAN
--> 		or a single VLAN on a VLAN-capable network
--> 
--> 	- campus
--> 		the set of rbridges on a segment that cooperate
--> 		together
--> 
--> I don't know if 802 has a term that describes the set of 
--> all VLANs that
--> share an infrastructure.
--> 
--> I would avoid the term LAN, as it could mean VLAN or segment, and I
--> don't think that's the intent.
--> 
--> Joe
--> 
-->