Dell PowerEdge VRTX - Manual (Page 18)

18 Features
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For more information, see "Virtual LAN Overview" on page 311.
GVRP Support
GARP VLAN Registration Protocol (GVRP) provides IEEE 802.1Q-
compliant VLAN pruning and dynamic VLAN creation on 802.1Q trunk
ports. When GVRP is enabled, the device registers and propagates VLAN
membership on all ports that are part of the active underlying Spanning Tree
Protocol topology.
For more information, see "GVRP Parameters" on page 327.
Voice VLAN
Voice VLAN enables network administrators to enhance VoIP service by
configuring 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
forwarded. Non-VoIP traffic is dropped from the Voice VLAN in Auto-Voice
VLAN Secure mode. Voice VLAN also provides QoS to VoIP, ensuring that the
quality of voice does not deteriorate if the IP traffic is received unevenly.
For more information, see "Voice VLAN" on page 332.
Guest VLAN
Guest VLAN provides limited network access to unauthorized ports. If a port
is denied network access via port-based authorization, but the Guest VLAN is
enabled, the port receives limited network access through the Guest VLAN.
For more information, see "Dot1x Authentication" on page 259.
Private VLAN
The Private VLAN feature provides Layer 2 isolation between ports that share
the same Broadcast domain, or in other words, it creates a point-to-
multipoint Broadcast domain. The ports can be located anywhere in the
Layer 2 network.
For more information, see "Private VLAN" on page 329.