4-14 Voice VLAN ConfigurationWhen configuring a voice VLAN, go to these sections for information you are interested in:z Overviewz Configuring a Voice VLANz Displaying and Maintaining Voice VLANz Voice VLAN ConfigurationOverviewA voice VLAN is configured specially for voice traffic. After assigning the ports connecting to voicedevices to a voice VLAN, you can configure quality of service (QoS) parameters for the voice traffic,thus improving transmission priority and ensuring voice quality.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 Organizationally Unique Identifier(OUI) address is regarded as voice traffic.You can configure the OUI addresses in advance or use the default OUI addresses. Table 4-1 lists thedefault OUI address for each vendor’s devices.Table 4-1 The default OUI addresses of different vendorsNumber OUI address Vendor1 0001-e300-0000 Siemens phone2 0003-6b00-0000 Cisco phone3 0004-0d00-0000 Avaya phone4 00d0-1e00-0000 Pingtel phone5 0060-b900-0000 Philips/NEC phone6 00e0-7500-0000 Polycom phone7 00e0-bb00-0000 3Com phone
