Understanding Spanning-Tree Features - Cisco WS-C3020 Software Configuration Manual

Configuring STP
This chapter describes how to configure the Spanning Tree Protocol (STP) on port-based VLANs on the
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
spanning-tree features such as Port Fast, UplinkFast, root guard, and so forth, see
"Configuring Optional Spanning-Tree Features."
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 contain this conceptual information:
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OL-8915-03
Understanding Spanning-Tree Features, page 16-1
Configuring Spanning-Tree Features, page 16-10
Displaying the Spanning-Tree Status, page 16-22
STP Overview, page 16-2
Spanning-Tree Topology and BPDUs, page 16-3
Bridge ID, Switch Priority, and Extended System ID, page 16-4
Spanning-Tree Interface States, page 16-4
How a Switch or Port Becomes the Root Switch or Root Port, page 16-7
Spanning Tree and Redundant Connectivity, page 16-8
Spanning-Tree Address Management, page 16-8
Accelerated Aging to Retain Connectivity, page 16-8
Spanning-Tree Modes and Protocols, page 16-9
Supported Spanning-Tree Instances, page 16-9
C H A P T E R
Chapter 17, "Configuring MSTP."
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide
16
For information about other
Chapter 18,
16-1