Configuring Stp; Understanding Spanning-Tree Features - Cisco Catalyst 2950 Software Configuration Manual

Configuring STP

This chapter describes how to configure the Spanning Tree Protocol (STP) on port-based VLANs on
your Catalyst 2950 or Catalyst 2955 switch. The switch can use either the per-VLAN spanning-tree plus
(PVST+) protocol based on the IEEE 802.1D standard and Cisco proprietary extensions, or the rapid
per-VLAN spanning-tree plus (rapid-PVST+) protocol based on the IEEE 802.1w standard.
For information about the Multiple Spanning Tree Protocol (MSTP) and how to map multiple VLANs
to the same spanning-tree instance, see
For information about other spanning-tree features such as Port Fast, UplinkFast, root guard, and so
forth, see
For complete syntax and usage information for the commands used in this chapter, see the command
Note
reference for this release.
This chapter consists of these sections:
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Understanding Spanning-Tree Features

These sections describe how basic spanning-tree features work:
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Chapter 15, "Configuring Optional Spanning-Tree Features."
Understanding Spanning-Tree Features, page 13-1
Configuring Spanning-Tree Features, page 13-11
Displaying the Spanning-Tree Status, page 13-24
STP Overview, page 13-2
Spanning-Tree Topology and BPDUs, page 13-2
Bridge ID, Switch Priority, and Extended System ID, page 13-3
Spanning-Tree Interface States, page 13-4
How a Switch or Port Becomes the Root Switch or Root Port, page 13-7
Spanning Tree and Redundant Connectivity, page 13-8
Spanning-Tree Address Management, page 13-8
Accelerated Aging to Retain Connectivity, page 13-8
Spanning-Tree Modes and Protocols, page 13-9
Supported Spanning-Tree Instances, page 13-9
C H A P T E R
Chapter 14, "Configuring MSTP."
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
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