Enterasys 1805 User Guide

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Spanning Tree Concepts  85

The IEEE 802.1D Spanning Tree Protocol resolves the problems of 

physical loops in a network by establishing one primary path between any 

two switches in a network. Any duplicate paths are barred from use and 

become standby or blocked paths until the original path fails, at which 

point they can be brought into service.

The ELS100-S24TX2M switch meets the requirements of the Spanning 

Tree Protocol (STP) by performing the following functions:

Creates a single spanning tree from any arrangement of switching or 

bridging elements. 

Compensates automatically for the failure, removal, or addition of 

any device in an active data path.

Achieves port changes in short time intervals, which establishes a 

stable active topology quickly with a minimum of network 

disturbance.

Uses a minimum amount of communications bandwidth to 

accomplish the operation of the Spanning Tree Protocol.

Reconfigures the active topology in a manner that is transparent to 

stations transmitting and receiving data packets.

Manages the topology in a consistent and reproducible manner 

through the use of Spanning Tree Protocol parameters.