This document discusses VLANs and trunking in converged networks. It covers the role of VLANs in segmenting broadcast domains and logically grouping devices. Trunks are used to allow communication between VLANs by tagging frames with the VLAN ID. The document provides instructions on configuring VLANs and trunks on Cisco switches using IOS commands, and troubleshooting common problems with VLAN and trunk configurations.

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VLANs
LAN Switching and Wireless – Chapter 3

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Objectives
 Explain the role of VLANs in a converged network.
 Explain the role of trunking VLANs in a converged
network.
 Configure VLANs on the switches in a converged
network topology.
 Troubleshoot the common software or hardware
misconfigurations associated with VLANs on switches
in a converged network topology.

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Explain the Role of VLANs in a
Converged Network
 Explain the role of VLANs in a converged network

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Explain the Role of VLANs in a
Converged Network
 Describe the different types VLANs

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Explain the Role of VLANs in a
Converged Network
 Describe the VLAN port membership modes

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Explain the Role of VLANs in a
Converged Network
 Describe how to manage broadcast domains with
VLANs

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Explain the Role of Trunking VLANs in a
Converged Network
 Explain the role of a trunk when using multiple VLANs
in a converged network

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Explain the Role of Trunking VLANs in a
Converged Network
 Describe how a trunk works

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Explain the Role of Trunking VLANs in a
Converged Network
 Describe the switch port trunking modes

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Configure VLANs on the Switches in a
Converged Network Topology
 Describe the steps to configure trunks and VLANs

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Configure VLANs on the Switches in a
Converged Network Topology
 Describe the Cisco IOS commands used to create a
VLAN on a Cisco Catalyst switch

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Configure VLANs on the Switches in a
Converged Network Topology
 Describe the Cisco IOS commands used to manage
VLANs on a Cisco Catalyst switch

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Configure VLANs on the Switches in a
Converged Network Topology
 Describe the Cisco IOS commands used to create a
trunk on a Cisco Catalyst switch

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Troubleshoot Common Software or Hardware
Misconfigurations Associated with VLANs
 Describe the common problems with VLANs and trunks

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 Describe the common problems with VLANs and trunks
Troubleshoot Common Software or Hardware
Misconfigurations Associated with VLANs

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 Describe how to use the troubleshooting procedure to
fix a common problem with VLAN configurations
Troubleshoot Common Software or Hardware
Misconfigurations Associated with VLANs

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Summary
 VLANS
Allows an administrator to logically group devices
that act as their own network
Are used to segment broadcast domains
Some benefits of VLANs include
Cost reduction, security, higher performance,
better management

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Summary
 Types of Traffic on a VLAN include
Data
Voice
Network protocol
Network management
 Communication between different VLANs requires the
use of
Routers

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Summary
 Trunks
A common conduit used by multiple VLANS for
intra-VLAN communication
 EEE 802.1Q
The standard trunking protocol
Uses frame tagging to identify the VLAN to which a
frame belongs
Does not tag native VLAN traffic

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