Cisco Catalyst 2975 Software Configuration Manual page 477

Configuring Optional Spanning-Tree Features
This chapter describes how to configure optional spanning-tree features on the Catalyst 2975 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 stack is running the Multiple
Spanning Tree Protocol (MSTP) or the rapid per-VLAN spanning-tree plus (rapid-PVST+) protocol.
Unless otherwise noted, the term switch refers to a standalone switch and to a switch stack.
For information on configuring the PVST+ and rapid PVST+, see
information about the Multiple Spanning Tree Protocol (MSTP) and how to map multiple VLANs to the
same spanning-tree instance, 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 Optional Spanning-Tree Features
These sections contain this conceptual information:
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OL-19720-02
Understanding Optional Spanning-Tree Features, page 18-1
Configuring Optional Spanning-Tree Features, page 18-12
Displaying the Spanning-Tree Status, page 18-19
Understanding Port Fast, page 18-2
Understanding BPDU Guard, page 18-2
Understanding BPDU Filtering, page 18-3
Understanding UplinkFast, page 18-3
Understanding Cross-Stack UplinkFast, page 18-5
Understanding BackboneFast, page 18-7
Understanding EtherChannel Guard, page 18-10
C H A P T E R
Chapter 17, "Configuring MSTP."
Catalyst 2975 Switch Software Configuration Guide
18
Chapter 16, "Configuring STP." For
18-1