Dell PowerConnect 3348 User's Guide - Page 255

VLANs function at Layer 2. Since VLANs isolate traffic within the VLAN, a Layer 3 functioning router is needed to allow traffic to flow between VLANs. Layer 3 routers identify segments and coordinate with VLANs. VLANs are broadcast and multicast domains. Broadcast and multicast traffic is only transmitted in the VLAN where the traffic is generated. VLAN tagging provides a method for transferring VLAN information between VLAN groups. VLAN tagging attaches a four byte tag to packet headers. The VLAN tag indicates to which VLAN the packet belongs. VLAN tags are attached to the packet by either the end station or by the network device. VLAN tags also contain VLAN network priority information. Combining VLANs and GVRP allows network managers to automatically disperse VLAN information.To display the VLAN page: • Click Switch > VLAN in the Tree View. The VLAN page opens. VLAN Page The VLAN page contains links for defining the following: • Defining VLAN Members • Defining VLAN Ports Settings Configuring Switch Infor mation 255