Subject: [rbridge] RBridge/bridge interaction

From: Eric.Gray at marconi.com (Gray, Eric)
Date: Fri, 21 Oct 2005 19:16:02 -0300

I also agree that this is a quite feasible approach.

--
Eric

--> -----Original Message-----
--> From: rbridge-bounces at postel.org 
--> [mailto:rbridge-bounces at postel.org]On
--> Behalf Of Guillermo Ib??ez
--> Sent: Friday, October 21, 2005 6:01 PM
--> To: Developing a hybrid router/bridge.
--> Subject: Re: [rbridge] RBridge/bridge interaction
--> 
--> 
--> Right. In this way both views are covered. I fully agree.
--> Guillermo
--> 
--> Radia Perlman wrote:
--> 
--> >Actually, here's a suggestion that may make us all happy.
--> >
--> >Keep the design of RBridge independent of bridges. RBridges do not 
--> >participate
--> >in spanning tree (other than throwing away BPDUs).
--> >
--> >However, to get the functionality that Guillermo 
--> wants....allow someone 
--> >to build a device that's logically the
--> >same as a bridge glued onto an RBridge. To the rest of the 
--> world it 
--> >would look
--> >like this:
--> >
--> >bridged island----B1----RB1
--> >
--> >where B1 is a bridge with two ports...a pt-to-pt link to 
--> RBRidge RB1, 
--> >and a link to the
--> >bridged LAN.
--> >
--> >The "RB1" portion of this box does what the architecture 
--> of an RBridge 
--> >does...it neither
--> >forwards, nor initiates spanning tree messages.
--> >
--> >However, the "B1" portion of the box acts like a vanilla 
--> bridge, and 
--> >does participate in
--> >spanning tree. And it can be configured to have whatever 
--> priority people 
--> >want.
--> >
--> >If it's commercially important for RBridges to have the 
--> capability of 
--> >participating in
--> >the bridge protocol, it can be done this way without 
--> defining it into 
--> >either the RBridge
--> >or bridge functionality.
--> >
--> >Radia
--> >
--> >
--> >
--> >Guillermo Ib??ez wrote:
--> >
--> >  
--> >
--> >>Root bridge planning is something required in campus 
--> networks, it just 
--> >>means configure the 16 bit priority of the preffered root 
--> bridge (and 
--> >>perhaps a root reserve) with a low enough value under the 
--> default value. 
--> >>
--> >>    
--> >>
--> >
--> >
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--> >rbridge at postel.org
--> >http://www.postel.org/mailman/listinfo/rbridge
--> >
--> >  
--> >
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