Types Of Vlans; Port-Based Vlans - Extreme Networks ExtremeWare XOS Guide Manual

Virtual LANs (VLANs)

Types of VLANs

VLANs can be created according to the following criteria:
• Physical port
• 802.1Q tag
• Ethernet, LLC SAP, or LLC/SNAP Ethernet protocol type
• MAC address
• A combination of these criteria

Port-Based VLANs

In a port-based VLAN, a VLAN name is given to a group of one or more ports on the switch. 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. A port can be a member of only one port-based VLAN.
On the Extreme switch in Figure 1, 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.
Figure 1: Example of a port-based VLAN on an Extreme switch
Finance
Marketing
Sales
EX_060
For the members of the different IP VLANs to communicate, the traffic must be routed by the switch,
even if they are physically part of the same I/O module. This means that each VLAN must be
configured as a router interface with a unique IP address.
62 ExtremeWare XOS 10.1 Concepts Guide