10
VOICE VLAN CONFIGURATION
When configuring Voice VLAN, go to these sections for information you are
interested in:
■ “Introduction to Voice VLAN” on page 99
■ “Configuring Voice VLAN” on page 101
■ “Displaying and Maintaining Voice VLAN” on page 103
■ “Voice VLAN Configuration Examples” on page 103
Introduction to Voice
VLAN
A voice VLAN is configured specially for voice traffic. By adding the ports that
connect voice devices to the voice VLAN, you can configure quality of service (QOS
for short) attributes for the voice traffic, improving transmission priority and
ensuring voice quality. A device determines whether a received packet is a voice
packet by checking its source MAC address. Packets containing source MAC
addresses that comply with the voice device Organizationally Unique Identifier
(OUI for short) addresses are regarded as voice traffic, and are forwarded to the
voice VLAN.
You can configure the OUI addresses in advance or use the default OUI addresses,
which are listed as follows.
n
■ 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 IEEE (Institute of Electrical
and Electronics Engineers).
■ You can add or remove default OUI address manually.
Voice VLAN Modes on a
Port
There are two voice VLAN modes on a port: automatic and manual (the mode here
refers to the way of adding a port to a voice VLAN).
■ In automatic mode, the system identifies the source MAC address contained in
the protocol packets (untagged packets) sent when the IP phone is powered on
Table 23 The default OUI addresses of different vendors
Number OUI address Vendors
1 0001-e300-0000 Siemens phone
2 0003-6b00-0000 Cisco phone
3 0004-0d00-0000 Avaya phone
4 0060-b900-0000 Philips/NEC phone
5 00d0-1e00-0000 Pingtel phone
6 00e0-7500-0000 Polycom phone
7 00e0-bb00-0000 3Com phone
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