In a port-based VLAN (Virtual LAN), a VLAN name is given to a group of one or more ports on the switch.
At boot-up, all ports are members of the port-based VLAN default. Before you can add any port to another port-based VLAN, you must remove it from the default VLAN, unless the new VLAN uses a protocol other than the default protocol any. An untagged port can be a member of only one port-based VLAN.
On the Extreme Networks switch in Example of a Port-Based VLAN on an Extreme Networks Switch, ports 9 through 14 are part of VLAN Marketing; ports 25 through 29 are part of VLAN Sales; and ports 21 through 24 and 30 through 32 are in VLAN Finance.
For the members of different IP VLANs to communicate, the traffic must be routed by the switch, even if the VLANs are physically part of the same switch. This means that each VLAN must be configured as a router interface with a unique IP address.
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