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CHAPTER
10-1
Catalyst 2950 Desktop Switch Software Configuration Guide
78-11380-05
10
Configuring STP
This chapter describes how to configure the Spanning Tree Protocol (STP) on your switch.
For information about the Rapid Spanning Tree Protocol (RSTP) and the Multiple Spanning Tree
Protocol (MSTP), see Chapter 11, “Configuring RSTP and MSTP.” For information about optional
spanning-tree features, see Chapter 12, “Configuring Optional Spanning-Tree Features.”
Note For complete syntax and usage information for the commands used in this chapter, refer to the command
reference for this release.
This chapter consists of these sections:
• Understanding Spanning-Tree Features, page 10-1
• Configuring Spanning-Tree Features, page 10-9
• Displaying the Spanning-Tree Status, page 10-21
Understanding Spanning-Tree Features
These sections describe how spanning-tree features work:
• STP Overview, page 10-2
• Supported Spanning-Tree Instances, page 10-2
• Bridge Protocol Data Units, page 10-2
• Election of the Root Switch, page 10-3
• Bridge ID, Switch Priority, and Extended System ID, page 10-4
• Spanning-Tree Timers, page 10-4
• Creating the Spanning-Tree Topology, page 10-5
• Spanning-Tree Interface States, page 10-5
• Spanning-Tree Address Management, page 10-8
• STP and IEEE 802.1Q Trunks, page 10-8