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

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 Benefit of VLANs

5. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 5 VLAN ID Range  Normal Range 1-1005 1002-1004 reserved for Token Ring and FDDI VLANs 1 and 1002-1005 are automatically created and cannot be removed Stored in vlan.dat file in flash memory VTP can only learn normal range VLANs  Extended Range 1006-2094 Designed for service providers Have fewer options than normal range VLANs Stored in running-config file VTP does not learn extended range VLANs

6. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 6 Types of VLAN  Data VLAN : Student & Guest  Default VLAN? Native VLAN? Mangement VLAN?

7. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 7 VLAN Port Membership Mode  Static Mode: Manual Config  Dynamic VLAN: Use VLAN Membership Policy Server (VMPS). Not widely used.  Voice VLAN: Support IP Phone.

8. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 8 Voice VLAN

9. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 9 Controlling Broadcast Domain (3.1.4)

10. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 10 Layer 3 Forwarding

11. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 11 VLAN Trunks 1 switch port 4 VLANs: 10,20,30,99 1 switch port 4 VLANs: 10,20,30,99 Trunking

12. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 12 802.1Q Frame Tagging  When Ethernet frames are placed on a trunk they need additional information about the VLANs they belong to.

13. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 13 Tagged vs. UnTagged frames on Native VLAN  Control traffic sent on native VLAN should be untagged.  Tagged Frames on Native VLAN are dropped.  All untagged frames coming in/out of 802.1Q port are forwarded to native VLAN.

14. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 14 Trunking Modes

15. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 15 Configure VLANs on the Switches in a Converged Network Topology  Describe the steps to configure trunks and VLANs

16. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 16 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

17. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 17 Configure VLANs on the Switches in a Converged Network Topology  Describe the Cisco IOS commands used to manage VLANs on a Cisco Catalyst switch

18. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 18 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

19. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 19 Troubleshoot Common Software or Hardware Misconfigurations Associated with VLANs  Describe the common problems with VLANs and trunks

20. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 20  Describe the common problems with VLANs and trunks Troubleshoot VLANs Problems

21. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 21 Troubleshoot VLANs Problems

22. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 22  Describe how to use the troubleshooting procedure to fix a common problem with VLAN configurations Troubleshoot VLANs Problem

23. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 23 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

24. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 24 Summary  Types of Traffic on a VLAN include Data Voice Network protocol Network management  Communication between different VLANs requires the use of Routers

25. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 25 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

26. © 2006 Cisco Systems, Inc. All rights reserved.Cisco PublicITE 1 Chapter 6 26