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Local Area High Speed Networks by Dr. Sidnie Feit

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Implementing VLANs

The previous sections introduced some major VLAN concepts and features. Now it is time to focus on how VLANs are configured and how switches process VLAN frames.

A VLAN is created by

  • Assigning a VLAN identifier

  • Defining VLAN members

  • Listing the switch ports through which members of the VLAN can be reached

  • For each VLAN port, indicating whether frames belonging to a VLAN must be transmitted from the port with or without tags

There are many different ways to define VLAN membership, including the following:

  • Default—Initially, all ports in a switch belong to the same default VLAN.

  • Port-based—At each switch, list the ports that belong to the VLAN.

  • Port- and protocol-based—At each switch, list ports that belong to the VLAN and the ...

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