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Voice VLAN configuration
A voice VLAN is configured especially for voice traffic. After assigning the ports connecting to voice devices
to a voice VLAN, the system automatically configures quality of service (QoS) parameters for voice traffic,
improving the transmission priority of voice traffic and ensuring voice quality.
OUI addresses
A device determines whether a received packet is a voice packet by checking its source MAC address. A
packet whose source MAC address complies with the voice device’s Organizationally Unique Identifier
(OUI) address is regarded as voice traffic.
You can configure the OUI addresses of a device in advance or use the default OUI addresses. 1 lists the
default OUI address for each vendor’s devices.
1. The default OUI addresses of different vendors
Number OUI Address
Vendor
1 0001-E300-0000 Siemens phone
2 0003-6B00-0000 Cisco phone
3 0004-0D00-0000 Avaya phone
4 00D0-1E00-0000 Pingtel phone
5 0060-B900-0000 Philips/NEC phone
6 00E0-7500-0000 Polycom phone
7 00E0-BB00-0000 3Com phone
NOTE:
In general, as the first 24 bits of a MAC address (in binary format), an OUI address is a globally
unique identifier assigned to a vendor by the IEEE. OUI addresses mentioned in this document,
however, are different from those commonly used. In this document, OUI addresses are used by the
system to determine whether a received packet is a voice packet. They are the results of the AND
operation of a MAC address and a mask. For more information, see “
ddin
OUI addresses to the
OUI list”.
You can manually remove the default OUI address of a device and then add new ones.
Voice VLAN assignment modes
A port can be assigned to a voice VLAN in one of the following modes:
In automatic mode, the system matches the source MAC addresses carried in the untagged packets
sent when an IP phone is powered on against the device’s OUI addresses. If a match is found, the
system automatically assigns the receiving port to a voice VLAN, issues ACL rules and configures the
packet precedence. You can configure voice VLAN aging time on the device. The system will remove
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