102 CHAPTER 6: VLAN OPERATION
Voice VLAN Configuration
Voice VLAN is specially designed for users’ voice flow, and it distributes different port
precedence in different cases.
The system uses the source MAC of the traffic travelling through the port to identify
the IP Phone data flow. You can either preset an OUI address or adopt the default OUI
address as the standard. Here the OUI address refers to that of a vendor.
Voice VLAN can be configured either manually or automatically. In auto mode, the
system learns the source MAC address and automatically adds the ports to a Voice
VLAN using the untagged packets sent out when IP Phone is powered on; in manual
mode, however, you need to add ports to a Voice VLAN manually. Both of the modes
forward the tagged packets sent by IP Phone without learning the address.
Since there are multiple types of IP Phones, you must ensure that the mode on a port
matches the IP Phone. See Table88:
Table88 The correspondence between Port Mode and IP Phone
Voice V LAN
Configuration
The configuration of Voice VLAN is described in the following sections:
■Enabling/Disabling Voice VLAN Features
■Enabling/Disabling Voice VLAN Features on a Port
■Setting/Removing the OUI Address Learned by Voice VLAN
■Enabling/Disabling Voice VLAN Security Mode
■Enabling/Disabling Voice VLAN Auto Mode
■Setting the Aging Time of Voice VLAN
If you change the status of Voice VLAN security mode, you must first enable Voice
VLAN features globally.
Voice VLAN Mode Type of IP Phone Port Mode
Auto mode Tagged IP Phone Access: Not supported
Trunk: Supported, but the default VLAN of the
connected port must exist and cannot be the
voice VLAN. The default VLAN is allowed to pass
the connected port.
Hybrid: Supported, but the default VLAN of the
connected port must exist and it is in the tagged
VLAN list which is allowed to pass the connected
port.
Untagged IP Phone Access, Trunk, and Hybrid: Not supported,
because the default VLAN of the connected port
must be the Voice VLAN, and the connected port
belongs to the Voice VLAN, that is, user add the
port to the Voice VLAN manually.
Manual Mode Tagged IP Phone Access: Not supported
Untag IP Phone
Untagged IP Phone
Trunk: Supported, but the default VLAN of the
connected port must exist and cannot be the
voice VLAN. The default VLAN is allowed to pass
the connected port
Hybrid: Supported, but the default VLAN of the
connected port must exist and it is in the tagged
VLAN list which is allowed to pass the connected
port.
Access: Supported, but the default VLAN of the
connected port must be the Voice VLAN.