Cisco Gigabit Ethernet Switch Module for HP p-Class BladeSystem Software Configuration Guide

CHAPTER

14-1

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Configuring Optional Spanning-Tree Features

This chapter describes how to configure optional spanning-tree features on the switch. You can

configure all of these features when your switch is running the per-VLAN spanning-tree plus (PVST+).

You can configure only the noted features when your switch is running the Multiple Spanning Tree

Protocol (MSTP) or the rapid per-VLAN spanning-tree plus (rapid-PVST+) protocol.

For information on configuring the PVST+ and rapid PVST+, see Chapter 12, “Configuring STP.” For

information about the Multiple Spanning Tree Protocol (MSTP) and how to map multiple VLANs to the

same spanning-tree instance, see Chapter 13, “Configuring MSTP.”

Note For complete syntax and usage information for the commands used in this chapter, see the command

reference for this release.

This chapter consists of these sections:

• Understanding Optional Spanning-Tree Features, page 14-1

• Configuring Optional Spanning-Tree Features, page 14-9

• Displaying the Spanning-Tree Status, page 14-16

Understanding Optional Spanning-Tree Features

These sections contain this conceptual information:

• Understanding Port Fast, page 14-2

• Understanding BPDU Guard, page 14-2

• Understanding BPDU Filtering, page 14-3

• Understanding UplinkFast, page 14-3

• Understanding BackboneFast, page 14-5

• Understanding EtherChannel Guard, page 14-7

• Understanding Root Guard, page 14-8

• Understanding Loop Guard, page 14-9