1 CCNA 3 v3.1 Module 8

2 CCNA 3 Module 8 Virtual LANS (VLANS)

333 Objectives of Module 8 VLAN concepts VLAN configuration Troubleshooting VLANs

444 Introduction to VLANs

555 VLANs VLANs logically segment switched networks based on an organization's functions, project teams, or applications as opposed to a physical or geographical basis.

666 Broadcast Domains

777 3 Broadcast Domains, 3 VLANs

888 Static VLANs

999 Dynamic VLANs

10 Port-Centric VLANs

11 VLAN Configuration

12 Benefits of VLANs Easily move workstations on the LAN Easily add workstations to the LAN Easily change the LAN configuration Easily control network traffic Improve security

13 Communicating Between VLANs

14 VLAN Types

15 Inter-Switch Link

16 Concurrent Transmissions in a Switch

17 End-to-End VLANs

18 Static VLANs Static VLANs work well in networks where the following is true: Moves are controlled and managed. There is robust VLAN management software to configure the ports. It is not desirable to assume the additional overhead required when maintaining end- station MAC addresses and custom filtering tables.

19 Verifying VLAN’s

20 Saving VLAN Configuration Back up using the copy running-config tftp command, or you can use the HyperTerminal Capture Text feature to store the configuration settings.

21 Deleting VLANs

22 VLAN Problem Isolation

23 Problem Isolation in Catalyst Networks

24 Preventing Broadcast Storms

25 Common Problems in Troubleshooting VLANs

26 show vlan Command

27 Catalyst IOS Keyword Syntax Description

28 show spanning-tree Command

29 VLAN Troubleshooting Scenarios A trunk link cannot be established between a switch and a router

30 VLAN Troubleshooting Scenarios VTP is not properly propagating VLAN configuration changes.

31 VLAN Troubleshooting Scenarios Dropped packets and loops