Cisco Catalyst 4500 Series - Configuring Optional Stp Features

CHAPTER
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Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
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Configuring Optional STP Features
This chapter describes the Spanning Tree Protocol (STP) features supported on the Catalyst 4500 series
switch. It also provides guidelines, procedures, and configuration examples.
This chapter includes the following major sections:
• About Root Guard, page 23-2
• Enabling Root Guard, page 23-2
• About Loop Guard, page 23-3
• Enabling Loop Guard, page 23-4
• About EtherChannel Guard, page 23-6
• Enabling EtherChannel Guard (Optional), page 23-6
• About PortFast, page 23-6
• Enabling PortFast, page 23-7
• About BPDU Guard, page 23-8
• Enabling BackboneFast, page 23-15
• About PortFast BPDU Filtering, page 23-9
• Enabling BackboneFast, page 23-15
• About UplinkFast, page 23-11
• Enabling UplinkFast, page 23-12
• About BackboneFast, page 23-13
• Enabling BackboneFast, page 23-15
Note For information on configuring STP, see Chapter 20, “Configuring STP and MST.”
Note For complete syntax and usage information for the switch commands used in this chapter, first look at
the Cisco Catalyst 4500 Series Switch Command Reference and related publications at this location:
http://www.cisco.com/en/US/products//hw/switches/ps4324/index.html
If the command is not found in the Catalyst 4500 Series Switch Command Reference, it will be found in
the larger Cisco IOS library. Refer to the Cisco IOS Command Reference and related publications at this