Notes
Slide Show
Outline
1
Interconnecting Cisco Networking Devices
  • Module 6
  • VLANs
2
Overview

  • VLAN Basics
  • VLAN Memberships
  • VLAN Trunking Protocol (VTP)
  • VTP Modes of Operation
  • VTP Pruning
  • Routing Between VLANs
  • Useful Commands
3
VLAN Basics
4
VLAN Basics (cont.)

  • Broadcast Control


  • Security


  • Flexibility and Scalability
5
VLAN Memberships

  • Static VLANs


  • Dynamic VLANs
6
VLAN Basics (cont.)
  • Identifying VLANs
  • Access Links
  • Trunk Links


  • Frame Tagging
  • Types
  • Inter-Switch Link (ISL)


  • IEEE 802.1Q (dot1q)
7
VLAN Trunking Protocol (VTP)
  • Consistent VLAN configuration across all switches


  • Allows VLANs to be trunked over mixed networks


  • Accurate Tracking and Monitoring


  • Dynamic Reporting


  • Plug-and-Play VLAN adding
8
VTP Modes of Operation

  • Server


  • Client


  • Transparent
9
VTP Pruning

  • Preserves bandwidth by limiting broadcasts, multicasts and unicast packets to their correct network


  • Disabled by default
10
Routing Between VLANs
  • “Router on a Stick” / “One Armed Router”
11
Useful Commands
  • vlan 2 name Sales
  • sh vlan
  • vlan database (2950 switch)
  • sh vlan brief
  • switchport access vlan 2 (2950 switch)
  • vtp server | client | transparent
  • vtp domain NewHorizons
  • sh vtp
12
Summary
  • VLAN Basics
  • VLAN Memberships
  • VLAN Trunking Protocol (VTP)
  • VTP Modes of Operation
  • VTP Pruning
  • Routing Between VLANs
  • Useful Commands