R3102-R3103-HP 6600/HSR6600 Routers Layer 2 - LAN Switching Configuration Guide

119
Configuring a voice VLAN
The voice VLAN feature is supported on SAP modules that are operating in bridge mode.
Overview
A voice VLAN is configured for voice traffic. After assigning 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 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.
You can configure the OUI addresses of a device in advance, or use the default OUI addresses. You can
manually remove the default OUI address of a device and then add new ones.
Table 13 lists the de
fault OUI address for each vendor's devices.
Table 13 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
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.
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 packets sent when an IP
phone is powered on against the device's OUI addresses. If the system finds a match, it