CHAPTER
17-1
Catalyst 2960 Switch SoftwareConfiguration Guide
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17
Configuring Optional Spanning-Tree Features
This chapter describes how to configure optional spanning-tree features on the Catalyst 2960 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 Multipl e 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 15, “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 16, “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 17-1
Configuring Optional Spanning-Tree Features, page 17-9
Displaying the Spanning-Tree Status, page 17-16

Understanding Optional Spanning-Tree Features

These sections contain this conceptual information:
Understanding Port Fast, page 17-2
Understanding BPDU Guard, page 17-3
Understanding BPDU Filtering, page 17-3
Understanding UplinkFast, page 17-4
Understanding BackboneFast, page 17-5
Understanding EtherChannel Guard, page 17-7
Understanding Root Guard, page 17-8
Understanding Loop Guard, page 17-9