OUI Address (Organizationally unique identifier address)
The switch can determine whether a received packet is a voice packet by checking its source MAC
address. If the source MAC address of a packet complies with the OUI addresses configured by
the system, the packet is determined as voice packet and transmitted in voice VLAN.
An OUI address is a unique identifier assigned by IEEE (Institute of Electrical and Electronics
Engineers) to a device vendor. It comprises the first 24 bits of a MAC address. You can recognize
which vendor a device belongs to according to the OUI address. The following table shows the
OUI addresses of several manufacturers. The following OUI addresses are preset of the switch by
default.
Number OUI Address Vendor
1 00-01-e3-00-00-00 Siemens phone
2 00-03-6b-00-00-00 Cisco phone
3 00-04-0d-00-00-00 Avaya phone
4 00-60-b9-00-00-00 Philips/NEC phone
5 00-d0-1e-00-00-00 Pingtel phone
6 00-e0-75-00-00-00 Polycom phone
7 00-e0-bb-00-00-00 3com phone
Table 9-1 OUI addresses on the switch
Port Voice VLAN Mode
A voice VLAN can operate in two modes: automatic mode and manual mode.
Automatic Mode: In this mode, the switch automatically adds a port which receives voice packets
to voice VLAN. The aging time of voice VLAN can be configured on the switch. If the switch does
not receive any voice packet on the ingress port within the aging time, the switch will remove this
port from voice VLAN. Voice ports are automatically added into or removed from voice VLAN.
Manual Mode: You need to manually add the port of IP phone to voice VLAN.
In practice, the port voice VLAN mode is configured according to the type of packets sent out from
voice device and the link type of the port. The following table shows the detailed information.
Port Voice
VLAN Mode
Voice
Stream Type Link type of the port and processing mode
ACCESS: Not supported.
TRUNK: Supported. The default VLAN of the port can not be
voice VLAN.
Automatic Mode
TAG vo ice
stream GENERAL: Supported. The default VLAN of the port can not
be voice VLAN and the egress rule of the access port in the
voice VLAN should be TAG.
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