VLAN and VLAN Trunking Configuration and Verification
Cisco switches do not require any configuration to work. You can purchase Cisco switches, install devices with the correct cabling, turn on the switches, and they work. You would never need to configure the switch, and it would work fine, even if you interconnected switches, until you needed more than one VLAN. But if you want to use VLANs—and most every enterprise network does—you need to add some configuration.
This chapter separates the VLAN configuration details into two major sections. The first section looks at how to configure access interfaces, which are switch interfaces that do not use VLAN trunking. The second part shows how to configure interfaces that do use VLAN trunking.
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