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C H A P T E R 7 Virtual LANs (VLANs)
97
Typ es o f V LAN s
You can create VLANs based on these criteria:
• Physical port
• 802.1Q tag
• Ethernet, Logical Link Control Service Advertising Protocol
(LLC SAP), or Logical Link Control
Subnetwork Access
Protocol (
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. A port can be a member of only one port-
based VLAN.
For example, on the switch in Figure 7.1:
• Ports 1 through 4 are part of VLAN Marketing
• Ports 9 through 12 are part of VLAN Sales
• Ports 5 through 8 and 15 and 16 are in VLAN Finance.
Figure 7.1: Example of a port-based VLAN on the Intel
®
NetStructure
™
480T routing 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
480t_016
3421
7865
11 12109
13 161514
Sales
Marketing
Finance
®