Research Article
Optimizing QoS aware ethernet spanning trees
@INPROCEEDINGS{10.1109/MSAN.2005.1489937, author={Tibor Cinkler and Istvan Moldovan and Andras Kern and Csaba Lukovszki and Gyula Sallai}, title={Optimizing QoS aware ethernet spanning trees}, proceedings={1st International ICST Conference on Multimedia Services Access Networks}, publisher={IEEE}, proceedings_a={MSAN}, year={2005}, month={8}, keywords={}, doi={10.1109/MSAN.2005.1489937} }- Tibor Cinkler
Istvan Moldovan
Andras Kern
Csaba Lukovszki
Gyula Sallai
Year: 2005
Optimizing QoS aware ethernet spanning trees
MSAN
IEEE
DOI: 10.1109/MSAN.2005.1489937
Abstract
Ethernet is gaining on its importance in both access and metro networks. As a layer 2 technology, Ethernet gives a basic framework for routing, QoS and Traffic Engineering (TE), as well as a protocol for building up trees. IEEE 802.1 standards define default configuration parameters considering the topology only. In this paper we propose methods for resource management in Ethernet networks through spanning tree optimization for both STP (IEEE 802.1D) and MSTP (IEEE 802.1s). As a result of optimization we assign costs to the bridge ports in the network to build trees based on these costs via STP and MSTP. These trees yield optimized routing, TE and support for different QoS classes. We show on typical metro-access networks, that through optimization the total network throughput can be significantly increased for both cases: when enforcing fairness or when allowing starvation of some demands. This gain can be realized by simultaneously assigning demands to trees and routing these trees.