Allied-telesis AT-S25 Bedienungsanleitung PDF herunterladen (Seite 155)

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Appendix C

Spanning Tree Protocol Concepts

This appendix provides a brief explanation of the Spanning Tree

Protocol (STP) as implemented by Allied Telesyn on the AT-8300 Series

Fast Ethernet Switches.

For detailed information on the operation of the Spanning Tree Protocol,

consult Section 4 of IEEE Std 802.1D, ISO/IEC 10038: 1993.

The AT-8300 switches, which run the AT-S25 software, implement the

IEEE 802.1D Spanning Tree Protocol. The STP provides a network with

robustness and allows network administrators to easily change their

network topology. Its implementation reduces complex network

topologies (networks with multiple paths between source and

destination nodes) to a single active topology. This technique

guarantees that loops do not occur between source and destination

nodes of the network. Loops are eliminated by placing some of the

redundant ports in a “blocking” state, in which they do not forward

packets but continue to execute the protocol. If the network topology

changes, for example by the failure, removal, or addition of an active

network node, a “blocked” port may be included in the new active

topology and begin forwarding frames.

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Allied-telesis AT-S25 Bedienungsanleitung Seite 155