SNR S2940-8G-v2 Switch Configuration Guide
Voice VLAN Configuration
Chapter 23
Voice VLAN Configuration
23.1 Introduction to Voice VLAN
Voice VLAN is specially configured for the user voice data traffic. By setting a Voice VLAN and
adding the ports of the connected voice equipments to the Voice VLAN, the user will be able
to configure QoS (Quality of service) service for voice data, and improve the voice data traffic
transmission priority to ensure the calling quality.
The switch can judge if the data traffic is the voice data traffic from specified equipment ac-
cording to the source MAC address field of the data packet entering the port. The packet with the
source MAC address complying with the system defined voice equipment OUI (Organizationally
Unique Identifier) will be considered the voice data traffic and transmitted to the Voice VLAN.
The configuration is based on MAC address, acquiring a mechanism in which every voice
equipment transmitting information through the network has got its unique MAC address. VLAN
will trace the address belongs to specified MAC. By This means, VLAN allows the voice equipment
always belong to Voice VLAN when relocated physically. The greatest advantage of the VLAN is
the equipment can be automatically placed into Voice VLAN according to its voice traffic which will
be transmitted at specified priority. Meanwhile, when voice equipment is physically relocated, it
still belongs to the Voice VLAN without any further configuration modification, which is because it
is based on voice equipment other than switch port.
Notice: Voice VLAN needs to associate with Hybrid attribute of the ports to work, so the ports
that may be added to Voice VLAN must be configured as Hybrid port.
23.2 Voice VLAN Configuration
Voice VLAN Configuration Task Sequence:
1. Set the VLAN to Voice VLAN
2. Add a voice equipment to Voice VLAN
3. Enable the Voice VLAN on the port
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