Chapter 10 Configuring Vlans; Understanding Vlans - Cisco Catalyst 3750 Software Configuration Manual

Metro switch

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Configuring VLANs

This chapter describes how to configure normal-range VLANs (VLAN IDs 1 to 1005) and

extended-range VLANs (VLAN IDs 1006 to 4094) on the Catalyst 3750 Metro switch. It includes

information about VLAN membership modes, VLAN configuration modes, VLAN trunks, and dynamic

VLAN assignment from a VLAN Membership Policy Server (VMPS).

For complete syntax and usage information for the commands used in this chapter, refer to the command

reference for this release.

The chapter includes these sections:

A VLAN is a switched network that is logically segmented by function, project team, or application,

without regard to the physical locations of the users. VLANs have the same attributes as physical LANs,

but you can group end stations even if they are not physically located on the same LAN segment. Any

switch port can belong to a VLAN, and unicast, broadcast, and multicast packets are forwarded and

flooded only to end stations in the VLAN. Each VLAN is considered a logical network, and packets

destined for stations that do not belong to the VLAN must be forwarded through a router or a switch

supporting fallback bridging, as shown in

network, it contains its own bridge MIB information and can support its own implementation of spanning

Before you create VLANs, you must decide whether to use VLAN Trunking Protocol (VTP) to maintain

global VLAN configuration for your network. For more information on VTP, see

"Configuring VTP."

Understanding VLANs, page 10-1

Configuring Normal-Range VLANs, page 10-4

Configuring Extended-Range VLANs, page 10-12

Displaying VLANs, page 10-16

Configuring VLAN Trunks, page 10-16

Configuring VMPS, page 10-28

Chapter 14, "Configuring STP."

C H A P T E R

10-1. Because a VLAN is considered a separate logical

Catalyst 3750 Metro Switch Software Configuration Guide

Troubleshooting