TP-Link T2500G-10MPS, User Manual

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Configuration Guide 490
Configuring Voice VLAN Configuration Example
3
Configuration Example
3.1 Network Requirements
The company plans to install IP phones in the office area and the meeting room, and has
requirements as follows:

In the office area
»
IP phones share switch ports used by computers, because no more ports are
available for IP phones.
»
Transmit voice traffic in an exclusive path with high quality.
»
Avoid attacks from malicious data flows.

In the meeting room
»
Transmit voice traffic in an exclusive path with high quality.
»
Avoid attacks from malicious data flows.
3.2 Configuration Scheme
In the office area, IP phones share the same ports of the switch with computers and
therefore occupy no more ports. To separate voice traffic from data traffic, configure
LLDP-MED to instruct IP Phones to send traffic with the voice VLAN tag. Voice traffic is
transmitted in the voice VLAN, and data traffic is transmitted in the default VLAN. Set ports
that are connected to IP phones in automatic voice VLAN mode. Meanwhile, configure the
voice VLAN to work in security mode and to forward only legal voice packets.
In the meeting room, the switch provides dedicated connections to IP phones. In this
situation, IP phones do not need to send traffic with the voice VLAN tag. Set ports that are
connected to IP phones in manual voice VLAN mode. Meanwhile, configure the voice VLAN
to work in security mode and to forward only legal voice packets.
To ensure the high quality of voice traffic, configure all devices along the path to keep the
priority of voice traffic and to coordinate with the voice VLAN configuration.
3.3 Network Topology
In the office area, IP phones are added to ports that are connected to computers on Switch
A. These ports use the voice VLAN for voice traffic, and the default VLAN for data traffic.