Creating a VLAN Major Interface

To use VLANs, you must first configure the Ethernet interface for VLAN encapsulation. This creates the VLAN major interface.

To configure the Ethernet interface for VLAN encapsulation:

  1. Specify a Fast Ethernet, Gigabit Ethernet, or 10-Gigabit Ethernet port.
    host1(config)#interface fastEthernet 4/0
  2. Specify VLAN as the encapsulation method.
    host1(config-if)#encapsulation vlan

    The router creates the VLAN major interface.

You can now create multiple VLAN subinterfaces to carry higher-level protocols. For examples, see Configuring VLAN Subinterfaces, next.

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