Networking

An Effective Solution to Reduce Count-to-Infinity Problem in Ethernet

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Executive Summary

Ethernet is currently the most popular networking technology because of its high performance, low cost and ubiquity nature. Ethernets rely on the dynamic computation of a cycle-free active forwarding topology. For that it uses rapid spanning tree protocol. Unfortunately, it exhibits count-to-infinity problem that may lead to forwarding loops under certain network failures. These consequences are considered serious since network can become highly congested and even packet forwarding can fail. In this work, a simple and effective solution to reduce count-to-infinity problem, called RSTP with epochs is proposed. This eliminates the count-to-infinity induced forwarding loop and improves the convergence time.

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