Summary
An understanding of the following key points should have been achieved:
  • ISL and 802.1Q trunking
  • Geographic VLANs
  • Configuring static VLANs on 29xx series Catalyst switches
  • Verifying and saving VLAN configurations
  • Deleting VLANs from a switch
  • Definition of VLANs
  • The benefits of VLANs
  • How VLANs are used to create broadcast domains
  • How routers are used for communication between VLANs
  • The common VLAN types
  • A systematic approach to VLAN troubleshooting
  • The steps for general troubleshooting in switched networks
  • How spanning-tree problems can lead to broadcast storms
  • Using show and debug commands to troubleshoot VLANs