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As the Ethernet technology is growing out from the LAN environment, its restoration and scalability properties are getting more attention. Loop protection and restoration for Ethernet is provided by the Spanning Tree Protocols. The Rapid Spanning Tree Protocol (RSTP) avoids loops in the network by reducing the logical topology to a tree, and achieves fast restoration in case of failures. This paper investigates the scalability and restoration time of the RSTP protocol by measurements and simulation. The paper shows that scalability of RSTP is limited, arbitrary size bridged Ethernet topologies can not be constructed. Based on measurement results the paper calibrated the simulation and has determined the restoration time of the protocol for typical topologies.

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Format:PDFSize:66 KB
Date:May 2006
Pages:1

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