
308623-14.00 Rev 00
5-1
Chapter 5
Configuring 802.1Q Tagging
This chapter provides an overview of 802.1Q tagging and instructions for
configuring it on a router. It includes the following information:
Virtual LAN Overview
Traditional LANs are defined by physical media:
• Early first-generation LANs were defined by the cable or fiber that connected
workstations.
• Later second-generation LANs, or LAN segments, are defined by the
concentrators, repeaters, or hubs (all physical layer, or layer 1, devices) that
connect workstations.
Traditional LANs are connected by bridges at layer 2 or by routers at layer 3.
Topic Page
Virtual LAN Overview 5-1
802.1Q Tagging 5-6
Router Processing of Tagged Frames 5-7
Implementation Considerations 5-8
Adding a Tagged Circuit to an Unconfigured 100BASE-T Interface 5-8
Adding a Tagged Circuit to an Existing 100BASE-T Interface 5-10
Editing a Tagged Circuit 5-11
Disabling a Tagged Circuit 5-12
Deleting a Tagged Circuit 5-12
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