Abstract
With its low cost, ubiquity, and scale, Ethernet is the technology most widely envisioned to change the economics of packet service delivery for both carriers and their customers. This paper discusses a new architecture that simplifies and lowers the cost to deliver data services. By fully integrating Ethernet with existing SONET/SDH networks in a Ethernet Ring, carriers can now provide a multipoint Ethernet service that can span long distances across multiple metro areas. This architecture leverages the plug-and-play advantages of Ethernet - auto-provisioning, broadcast and discovery, etc. - across a distributed wide area network. It provides the advantage of granular, software-provisioned bandwidth to the customer. It also provides SONET/SDH quality resilience with security and bandwidth guarantee. By incorporating protocol mediation technology, this architecture enables the migration from today's frame relay, ATM and IP services to a new generation of granular, readily scalable Ethernet services such as Ethernet Private Line, Ethernet Virtual Private Lines and Internet/Frame Relay/ATM/Access Services.
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