Dell PowerConnect 55xx Systems User Guide 21FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Maintenance Projects\DellContax\CxUGFeatures.fmD E L L C O N F I D E N T I A L – P R E L I M I N A R Y 9 / 1 1 / 1 2 - F O R P R O O F O N LYVLAN Supported FeaturesVLAN SupportVLANs are collections of switching ports that comprise a single Broadcastdomain. Packets are classified as belonging to a VLAN, based on either theVLAN tag or on a combination of the ingress port and packet contents.Packets sharing common attributes can be grouped in the same VLAN.For more information, see "VLANs" on page 467.Port-Based Virtual LANs (VLANs)Port-based VLANs classify incoming packets to VLANs, based on their ingressport.For more information, see "Defining VLAN Membership Using CLICommands" on page 474.Full 802.1Q VLAN Tagging ComplianceIEEE 802.1Q defines an architecture for virtual, bridged LANs, the servicesprovided in VLANs, and the protocols and algorithms involved in theprovision of these services.For more information, see "Virtual LAN Overview" on page 468.GVRP SupportGARP VLAN Registration Protocol (GVRP) provides IEEE 802.1Q-compliant VLAN pruning and dynamic VLAN creation on 802.1Q trunkports. When GVRP is enabled, the device registers and propagates VLANmembership on all ports that are part of the active underlying Spanning TreeProtocol topology.For more information, see "GVRP Parameters" on page 491.Voice VLANVoice VLAN enables network administrators to enhance VoIP service byconfiguring ports to carry IP voice traffic from IP phones on a specific VLAN.VoIP traffic has a preconfigured OUI prefix in the source MAC address.Network administrators can configure VLANs from which voice IP traffic is
