This chapter describes the operation of a VLAN switch and discusses the operations that a VLAN switch performs in response to both normal and VLAN-originated network traffic.
DESCRIPTION
Port based VLAN operation is slightly different than the operation of traditional switched networking systems. These differences are due to the importance of keeping track of each transmission’s VLAN membership as it passes from switch to switch or from port to port within a switch.
VLAN COMPONENTS
Before describing the operation of a port based VLAN, it is important to understand the basic elements that are combined to make up an 802.1Q VLAN.
1. Stations
A station is any end unit that belongs to a network. In the vast majority of cases, stations are the computers through which the users access the network.
2. Switches
In order to configure a group of stations into a VLAN, the stations must be connected to VLAN aware switches. It is the job of the switch to classify received frames into VLAN memberships and transmit frames, according to VLAN membership, with or without a VLAN Tag Header.
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