Alternative Multiple Spanning Tree Protocol (AMSTP) for Optical Ethernet Backbones

Authors:
Guillermo Ibanez;Alberto Garcia;Arturo Azcorra
Affiliations:
Universidad Carlos III de Madrid, Spain;Universidad Carlos III de Madrid, Spain;Universidad Carlos III de Madrid, Spain
Venue:
LCN '04 Proceedings of the 29th Annual IEEE International Conference on Local Computer Networks
Year:
2004

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Abstract

The availability and affordable cost of Gigabit and 10 Gigabit Ethernet switches has impacted the deployment of Metropolitan Area Networks (MANs) and campus networks. This paper presents a new protocol, Alternative Multiple Spanning Tree Protocol (AMSTP), that uses multiple source based spanning trees for backbones using Ethernet switches. It provides minimum paths and more efficient usage of optical backbone infrastructure than currently proposed protocols such as Resilient Packet Ring and Rapid Spanning Tree. The protocol exhibits features similar to MAC routing protocols like Link State Over MAC (LSOM) such as optimum path and effective infrastructure usage, without requiring MAC routing due to the use of the spanning tree protocol paradigm. AMSTP is not restricted to specific topologies such as ring or tree, but performs efficiently in arbitrary topologies. Among the application areas are optical backbones of campus and metropolitan area networks.