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To: RetiredNow who wrote (23555)	3/9/1999 10:09:00 PM
From: Frank A. Coluccio	Read Replies (1) \| Respond to of 77400

I would commend the following link and its pointers to the IETF files, for those who are discussing RSVP, QoS, and other emerging quality enhancing techniques. The role of RSVP has changed somewhat, since its earlier intended uses. Whereas RSVP was once thought to be an end to end solution, it has recently been relegated to more localized environments along with Int-serv, while Diff-serv has filled the void closer and into the core. Message 8201288 The draft is titled: "Interoperation of RSVP/Int-Serv and Diff-Serv Networks" Frank_C.

To: RetiredNow who wrote (23555)	3/10/1999 9:14:00 AM
From: The Phoenix	Respond to of 77400

Mindmeld, Well...I think you need to continue your excellent start at researching. A couple of quick thoughts. Apparently, RSVP is to switches what QoS is to ATM. So with RSVP mission critical packets (like voice or video) will arrive in a timely fashion because RSVP allocates and guarantees bandwidth between the sender and receiver. So now switches can do alot of the stuff routers can. Problem is that switches can't route over WANs. RSVP is to routing or routers what QOS is to ATM. ATM is switching by definition, RSVP is a software process which is fairly new (along with IP precendence and Diff Serv) which are layer 3 QOS mechanisms which are not committed to silicon and thus are not available to switches. So with these mechanisms routers can do even more than switches can! As for your arguement about L3 switches being pushed closer to the desktop...and interesting position which I don't this is true..they're always been used in the campus whereas the router has typically been the method to bring this traffic onto the WAN. I think for us to have a understandable dicussion we first must frame it. Are we talking an enterprise environment or a Service Provider environment? OG