Specifications

62 ExtremeWare XOS 10.1 Concepts Guide
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
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.
EX_060
Sales
Marketing
Finance