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| Sun Ethernet Fabric Operating System ### STP Administration Guide

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#### RSTP Overview

The RSTP module is based on the IEEE 802.1D rapid reconfiguration specification. The existing STP implementation requires significant time to reconfigure and restore service when a link failure occurs and restoration is required. Faster convergence, compared to the legacy spanning tree algorithm, is the most important feature in RSTP. RSTP avoids reconvergence delay by calculating an alternate root port and then immediately switching over to the alternate port, if the root port becomes unavailable.

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