Configuring Voice Vlan - D-Link xStack DXS-3250E Web/Installation Manual

DXS-3227, DXS-3227P, DXS-3250 and DXS-3250E EWS User Guide

Configuring Voice VLAN

Voice VLAN allows network administrators enhance VoIP service by configuring ports to carry IP voice traffic from
IP phones on a specific VLAN. VoIP traffic has a preconfigured OUI prefix in the source MAC address. Network
Administrators can configure VLANs on which voice IP traffic is forwarded. Non-VoIP traffic is dropped from the
Voice VLAN in auto Voice VLAN secure mode. Voice VLAN also provides QoS to VoIP, ensuring that the quality of
voice does not deteriorate if the IP traffic is received unevenly. The system supports one Voice VLAN.
There are two operational modes for IP Phones:
•
IP phones are configured with VLAN-mode as enabled, ensuring that tagged packets are used for all commu-
nications.
•
If the IP phone's VLAN-mode is disabled, the phone uses untagged packets. The phone uses untagged pack-
ets while retrieving the initial IP address through DHCP. The phone eventually uses the Voice VLAN and
starts sending tagged packets.
This section contains the following topics:
•
Defining Voice VLAN Properties Page
•
Defining Voice VLAN Port Settings
•
Defining OUIs
Defining Voice VLAN Properties Page
The Voice VLAN Properties Page contains information about Voice VLAN on the device, including the ports
enabled and included in the Voice VLAN. To define Voice VLAN settings:
1. Click Advanced Setup > VLAN > Voice VLAN > Port Settings. The Voice VLAN Properties Page opens:
Figure 124:Voice VLAN Properties Page
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