This document discusses VLANs and trunking in converged networks. It begins by explaining the objectives and then defines VLANs, describing how they segment broadcast domains and reduce costs. It also discusses trunking, how trunks allow communication between VLANs using tagging, and common trunking protocols. Finally, it addresses configuring and troubleshooting VLANs and trunks on Cisco switches.

1. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE I Chapter 6 1
VLANs
LAN Switching and Wireless – Chapter 3
Rikie Kartadie, ST

2. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 2
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.

3. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 3
Explain the Role of VLANs in a
Converged Network
 Explain the role of VLANs in a converged network

4. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 4
Explain the Role of VLANs in a
Converged Network
 Describe the different types VLANs

5. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 5
Explain the Role of VLANs in a
Converged Network
 Describe the VLAN port membership modes

6. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 6
Explain the Role of VLANs in a
Converged Network
 Describe how to manage broadcast domains with
VLANs

7. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 7
Explain the Role of Trunking VLANs in a
Converged Network
 Explain the role of a trunk when using multiple VLANs
in a converged network

8. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 8
Explain the Role of Trunking VLANs in a
Converged Network
 Describe how a trunk works

9. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 9
Explain the Role of Trunking VLANs in a
Converged Network
 Describe the switch port trunking modes

10. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 10
Configure VLANs on the Switches in a
Converged Network Topology
 Describe the steps to configure trunks and VLANs

11. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 11
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

12. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 12
Configure VLANs on the Switches in a
Converged Network Topology
 Describe the Cisco IOS commands used to manage
VLANs on a Cisco Catalyst switch

13. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 13
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

14. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 14
Troubleshoot Common Software or Hardware
Misconfigurations Associated with VLANs
 Describe the common problems with VLANs and trunks

15. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 15
 Describe the common problems with VLANs and trunks
Troubleshoot Common Software or Hardware
Misconfigurations Associated with VLANs

16. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 16
 Describe how to use the troubleshooting procedure to
fix a common problem with VLAN configurations
Troubleshoot Common Software or Hardware
Misconfigurations Associated with VLANs

17. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 17
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

18. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 18
Summary
 Types of Traffic on a VLAN include
Data
Voice
Network protocol
Network management
 Communication between different VLANs requires the
use of
Routers

19. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 19
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

20. © 2006 Cisco Systems, Inc. All rights reserved. Cisco PublicITE 1 Chapter 6 20