63Using the Business Policy Switch 2000 Version 1.2Refer to Chapter 4, “Chapter 4, “Policy-enabled networks.”For information on configuring QoS using the Console Interface (CI) menus, referto Chapter 3. To configure this feature using the Web-based management system,refer to Using Web-based Management for the Business Policy Switch 2000Software Version 1.2. To use Device Manager (DM) to configure QoS, refer toReference for the Business Policy Switch 2000 Management Software Version 1.2.And, to configure this feature using CLI commands, refer to Reference for theBusiness Policy Switch 2000 Command Line Interface Software Version 1.2.Virtual Local Area Networks (VLANs)In a traditional shared-media network, traffic generated by a station is transmittedto all other stations on the local segment. Therefore, for any given station on theshared Ethernet, the local segment is the collision domain because traffic on thesegment has the potential to cause an Ethernet collision. The local segment is alsothe broadcast domain because any broadcast is sent to all stations on the localsegment. Although Ethernet switches and bridges divide a network into smallercollision domains, they do not affect the broadcast domain. In simple terms, avirtual local area network (VLAN) provides a mechanism to fine-tune broadcastdomains.Your Business Policy Switch allows you to create three types of VLANs:• IEEE 802.1Q port-based VLANsA port-based VLAN is a VLAN in which the ports are explicitly configured tobe in the VLAN. When you create a port-based VLAN, you assign a PortVLAN Identifier (PVID) and specify which ports belong to the VLAN. ThePVID is used to coordinate VLANs across multiple switches.Note: For information on configuring VLANs, STGs, and MLTs, referto “STG configuration guidelines” on page 51.
