72 Switch Features
IP Subnet-based VLAN
This feature allows incoming untagged packets to be assigned to a VLAN and 
traffic class based on the source IP address of the packet.
MAC-based VLAN
This feature allows incoming untagged packets to be assigned to a VLAN and 
traffic class based on the source MAC address of the packet.
IEEE 802.1v Protocol-Based VLANs
VLAN classification rules are defined on data-link layer (Layer 2) protocol 
identification. Protocol-based VLANs are used for isolating Layer 2 traffic for 
differing Layer 3 protocols.
GARP and GVRP Support
The switch supports the configuration of Generic Attribute Registration 
Protocol (GARP) timers GARP VLAN Registration Protocol (GVRP) relies on 
the services provided by GARP to provide IEEE 802.1Q-compliant VLAN 
pruning and dynamic VLAN creation on 802.1Q trunk ports. When GVRP is 
enabled, the switch registers and propagates VLAN membership on all ports 
that are part of the active spanning tree protocol topology.
For information about configuring GARP timers see "Configuring L2 
Multicast Features" on page 695.
Voice VLAN
The Voice VLAN feature enables switch ports to carry voice traffic with 
defined priority. The priority level enables the separation of voice and data 
traffic coming onto the port. Voice VLAN is the preferred solution for 
enterprises wishing to deploy voice services in their network.