H3C Technologies H3C WX5500E Series Access Controllers - Manual (Page 158)

147
Configuring voice VLANs
This chapter describes how to configure voice VLANs.
Overview
A voice VLAN is configured for voice traffic. After assigning the ports that connect to voice devices to a
voice VLAN, the system automatically configures QoS parameters for voice traffic, to improve the
transmission priority of voice traffic and ensure voice quality.
Common voice devices include IP phones and integrated access devices (IADs). Only IP phones are used
in the voice VLAN configuration examples in this document.
OUI addresses
A device determines whether a received packet is a voice packet by evaluating its source MAC address.
A packet whose source MAC address complies with the Organizationally Unique Identifier (OUI)
address of the voice device is regarded as voice traffic.
In general, as the first 24 bits of a MAC address (in binary format), an OUI address is a globally unique
identifier that IEEE assigns to a vendor. In this document, however, OUI addresses are addresses that the
system uses to determine whether a received packet is a voice packet. They are the results of the AND
operation of the arguments mac-address and oui-mask in the voice vlan mac-address command.
You can manually remove the default OUI address of a device and then add new ones. You can
configure the OUI addresses of a device in advance or use the default OUI addresses. Table 14 lists the
default OUI address for each vendor's devices.
Table 14 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
Voice VLAN assignment modes
A port can be assigned to a voice VLAN in one of the following modes:
• Automatic mode—The system matches the source MAC address carried in protocol packets sent
when an IP phone is powered on against the device's OUI addresses. If the system finds a match,