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Cisco Catalyst 3750 Software Configuration Guide

Cisco Catalyst 3750
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CHAPTER
16-1
Catalyst 3750 Metro Switch Software Configuration Guide
78-15870-01
16
Configuring Optional Spanning-Tree Features
This chapter describes how to configure optional spanning-tree features on the Catalyst 3750 Metro
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 14, “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 15, “Configuring MSTP.”
Note For complete syntax and usage information for the commands used in this chapter, refer to the command
reference for this release.
This chapter consists of these sections:
Understanding Optional Spanning-Tree Features, page 16-1
Configuring Optional Spanning-Tree Features, page 16-9
Displaying the Spanning-Tree Status, page 16-16
Understanding Optional Spanning-Tree Features
These sections describe how the optional spanning-tree features work:
Understanding Port Fast, page 16-2
Understanding BPDU Guard, page 16-3
Understanding BPDU Filtering, page 16-3
Understanding UplinkFast, page 16-4
Understanding BackboneFast, page 16-5
Understanding Root Guard, page 16-7
Understanding Loop Guard, page 16-8

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Cisco Catalyst 3750 Specifications

General IconGeneral
Device TypeSwitch
Switching Capacity32 Gbps
Forwarding Rate38.7 Mpps
Stacking Bandwidth32 Gbps
RAM128 MB
Jumbo Frame SupportYes
Switch TypeManaged
ModelCatalyst 3750 Series
Uplink InterfacesSFP
Form FactorRack-mountable
MAC Address Table Size12, 000 entries
Routing ProtocolRIP, OSPF, EIGRP
Remote Management ProtocolSNMP, Telnet, HTTP
FeaturesLayer 3 switching, Layer 2 switching, auto-negotiation, BOOTP support, ARP support, VLAN support, auto-uplink (auto MDI/MDI-X), IGMP snooping, traffic shaping, MAC address filtering, Quality of Service (QoS), Jumbo Frames support, MLD snooping, Dynamic ARP Inspection (DAI), Cisco EnergyWise technology
Power over Ethernet (PoE)PoE
Operating Temperature-5 - 45 °C
Operating Humidity10% to 85% non-condensing

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