D-Link DGS-6600-48TS Configuration Guide - Page 128
Spanning Tree Protocol (STP) Configuration, Overview, An Introduction to Spanning Tree
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Volume 3-Layer 2 Configurations / Chapter 14-Spanning Tree Protocol (STP) Configuration Chapter Overview Chapter 14 Spanning Tree Protocol (STP) Configuration Chapter Overview The following topics are included in this chapter, please go to the topic for more detailed information: • Chapter Overview • An Introduction to Spanning Tree Protocol • Spanning Tree Protocol (STP) Concepts • Rapid Spanning Tree Protocol (RSTP) Concepts • Multiple Spanning Tree Protocol Concepts • STP Configuration Commands • Configuring a Single Spanning Tree Instance • Configuring Multiple Spanning Tree Instances • Configuring Optional Features • Configuration Examples • RSTP Configuration example • MSTP Configuration Example • List of Constants and Default Settings An Introduction to Spanning Tree Protocol Path redundancy is a useful technique for providing a reliable network. In a Layer 2 switching domain, multiple switching devices are connected together to form the network topology. If redundant paths exist in the network, a packet originating from a LAN segment attached to one node has multiple paths for getting to a LAN segment attached to another node. When the STP protocol is running on a Switch, the participating nodes will transmit BPDU messages to exchange information to determine a loop free topology. To achieve a loop free topology, some ports of the participating nodes will be set to a blocked state. When the topology is loop free, the participating node will constantly monitor all links. When any participating link fails, the port that was originally blocked will recover to provide the packet forwarding service. The Switch supports all versions of Spanning Tree Protocol, which includes STP, RSTP, and MSTP. Spanning Tree Protocol (STP) Concepts Spanning Tree is a protocol defined by IEEE 802.1d and is the first version of the Spanning Tree Protocol suite. The following topics are included in this section: • Basic Terminology • Timers • Port Role DGS-6600 Configuration Guide 128