RAD Unveils Resilient Ethernet Rings

RAD unveils Resilient Fast Ethernet Ring (RFER) technology with under 50-millisecond, carrier-class restoration capability

November 13, 2002

1 Min Read

TEL AVIV -- RAD Data Communications has announced that it has developed a new technology incorporated in its Megaplex data/voice multiplexer that provides self-healing capabilities on 100 Mbps Fast Ethernet fiber or copper rings. RAD’s unique Resilient Fast Ethernet Ring (RFER) carrier-class technology can re-route traffic within 50 milliseconds in case of link failure on any segment of the ring. This enables enterprises, campuses, power companies, transportation companies and utilities to create a highly reliable network using dark fiber or dry copper in a ring topology. Survivability is further enhanced by RFER’s modular, scalable support for multiple rings, which eliminates the risk of a single point of failure.Resilient Fast Ethernet Ring uses VLANs to overcome the storming problems that occur when attempting to broadcast over Ethernet rings or when a packet is assigned an incorrect address.RFER is implemented in the new ML-IP™ module for RAD’s popular Megaplex™ family of modular integrated access multiplexers. The ML-IP is an Ethernet uplink module with up to 8 Mbps uplink capacity that can be ordered with either 10/100BaseT or 100BaseFx interfaces with 50-millisecond protection, and serves as the main link to the IP network. The Megaplex-based network can support up to 40 E1 lines in a ring or daisy-chain topology.As is the case with SDH, RFER allows a total separation between rings, ensuring that a failure in one particular point will not bring down the entire network. “This robust network topology functions like a backbone solution,” explains Ami Sofer, Megaplex Product Line Manager at RAD Data Communications, “but is available at access network costs.”RAD Data Communications Ltd.

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