Re: [RPRWG] Why is RPR better as layer 2 technology than ATM
Frederick, I believe there is at least one additional fundamental benefit of
RPR vs ATM for layer 2 that is missing from your summary. RPR is frame
based, and is far more efficient for transfer of frames than ATM. Since
projections indicate an exponential growth of frame based traffic on MANs,
and only a linear increase of voice / circuit based traffic, it is critical
to have the next generation technology optimized to carry this frame based
traffic.
With that decision made, a fallout benefit is that RPR is a much simpler
technology to manage than ATM.
I am sure that many other benefits could be listed. I will leave it to
others to point out their favorite benefits.
Best regards,
Robert D. Love
Chair, Resilient Packet Ring Alliance
President, LAN Connect Consultants
7105 Leveret Circle Raleigh, NC 27615
Phone: 919 848-6773 Mobile: 919 810-7816
email: rdlove@xxxxxxxx Fax: 208 978-1187
----- Original Message -----
From: "Fredrik Davik" <bjornfd@xxxxxxxxx>
To: <stds-802-17@xxxxxxxx>
Sent: Wednesday, March 06, 2002 5:28 AM
Subject: [RPRWG] Why is RPR better as layer 2 technology than ATM
>
> I would like to see a summary of the capabilities that makes RPR a
> better choice than ATM for layer 2...
>
> I have listed the issues I believe is advantageous in the RPR
> technology compared to ATM:
>
> 1. No signaling is required to set up a connection in a RPR network
> (assignment of VCI and VPI identifiers in an ATM network).
>
> 2. Reuse of IPs interface to Ethernet/802.
>
> 3. Reuse of different Ethernet PHYs. Although this seems more like an
> issue for completing the standard within the given time-line without
> having to spend the time and money required to develop a new PHY. It
> isn't possible for a RPR station to talk to an Ethernet station
> without using some type of bridge/router station.
>
> 4. Layer 2 protection.
>
> 5. Spatial Reuse.
>
> Best Regards
> Fredrik
> ---------------------------------------------
> Fredrik Davik
>
> mailto:bjornfd@xxxxxxxxx
> http://www.simula.no/~bjornfd
>
> Simula Research Laboratory
> Postboks 134, Lysaker
> 1325 Lysaker