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802.1w - Rapid Reconfiguration of Spanning Tree

This supplement to ISO/IEC 15802-3:1998 (IEEE Std 802.1D-1998) defines the changes necessary to the operation of a MAC Bridge in order to provide rapid reconfiguration capability.

The motivations behind the development of this supplement include:

• The desirability of developing an improved mode of Bridge operation that, while retaining the plug-and-play benefits of Spanning Tree, discard some of the less desirable aspects of the existing Spanning Tree protocol, in particular the significant time taken for it to re-configure and restore service on link failure/restoration;
• The realisation that, while small improvements in Spanning Tree performance are possible through manipulation of the existing default parameter values, it is necessary to introduce significant changes to the way the Spanning Tree algorithm operates in order to achieve major improvements;
• The realisation that is possible to develop improvements to the operation of Spanning Tree that take advantage of the increasing prevalence of structured wiring approaches, while still retaining compatibility with equipment based on the original Spanning Tree algorithm.

Status

Incorporated into 802.1D-2004. Download from Get IEEE 802

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Last modified by jlm, at 1:01am on Wed, 26 Jul 2006

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