R3303-HP HSR6800 Routers Layer 2 - LAN Switching Configuration Guide

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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
automatically assigns the receiving port to the voice VLAN, issues ACL rules, and configures the
packet precedence. You can configure a voice VLAN aging time on the device. The system will
remove a port from the voice VLAN if no packets are received from the port during the aging time.
The system automatically assigns ports to, or removes ports from, a voice VLAN. Automatic mode
is suitable for scenarios where PCs and IP phones connected in series access the network through
the device, and ports on the device transmit both voice traffic and data traffic at the same time, as
shown in Figure 42. W
hen the voice VLAN works correctly, if the system reboots, the system
reassigns ports in automatic voice VLAN assignment mode to the voice VLAN after reboot, making
sure existing voice connections can work correctly. In this case, voice traffic streams do not trigger
port assignment to the voice VLAN.