Techfind proudly presents seminar report on Resilient Packet Ring Technology

:: ABSTRACT ::

Until now enterprises that needed the high speed restoration and high availability of telecommunications service obtainable by ring architectures for distributed networking or Metropolitan Area Networks (MAN) have been faced with a dilemma. Synchronous Digital Hierarchy and Synchronous Optical Network (SDH/SONET) rings undeniably provide a very high level of protection, but synchronous equipment is significantly more expensive than Ethernet-based networking and incurs a heavy bandwidth penalty to achieve its levels of Protection. For its part, although it functions well in point-to-point and meshed network topologies, non-trivial obstacles have to be surmounted before Ethernet may be deployed in a ring topology. In particular ,SDH/SONET-like fast protection mechanisms are not integral to Ethernet. An alternative known as Resilient Packet Ring (RPR) combines the resilience of SDH/SONET with the lower cost of IP/Ethernet, but it is not yet widely deployed. Scaled for larger deployments, the industry expectation is that while RPR will become one of the most widely used IP networking tools, it is unlikely to be economically viable for all network sizes and application types. Now, there is a third approach to low cost, fast restoration networking –Resilient Fast Ethernet Ring (RFER), a new technology that delivers SDH/SONET-type resilience at Ethernet cost for small-to-medium applications. An important trend in networking is the migration of packet-based technologies from local Area Networks to Metropolitan Area Networks. The rapidly increasing volume of data traffic in metro networks is challenging the capacity limits of existing transport infrastructures based on circuit-oriented technologies like SONET and ATM. In efficiencies associated with carrying increasing quantities of data traffic over voice-optimized circuit-switched networks makes it difficult to provision new services, and increases the cost of building additional capacity beyond the limits of most carriers capital expense budgets. Packet-based transport technology, a natural fit with the now ubiquitous IP protocol, is considered by many to be the only alternative for scaling metro networks to meet the demand.

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