Extreme Networks Summit1 manual Types of Vlans, PORT-BASED Vlans

VIRTUAL LANS (VLANS)

•VLANs provide extra security.

Devices within each VLAN can only communicate with member devices in the same VLAN. If a device in VLAN Marketing must communicate with devices in VLAN Sales, the traffic must cross a routing device.

•VLANs ease the change and movement of devices.

With traditional networks, network administrators spend much of their time dealing with moves and changes. If users move to a different subnetwork, the addresses of each endstation must be updated manually.

For example, with a VLAN, if an endstation in VLAN Marketing is moved to a port in another part of the network, and retains its original subnet membership; you must only specify that the new port is in VLAN Marketing.

TYPES OF VLANS

The Summit supports a maximum of 256 VLANs. Summit VLANs can be created according to the following criteria:

•Physical port

•802.1Q tag

•Ethernet, LLC SAP, or LLC/SNAP Ethernet protocol type

•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 switch port can be a member of only one port-based VLAN.

5-2 SUMMIT SWITCH INSTALLATION AND USER GUIDE