Configuring A Voice Vlan; Configuration Prerequisites; Configuring Qos Priority Settings For Voice Traffic On An Interface - HP A5120 EI Series Configuration Manual

Voice VLAN
mode

Configuring a voice VLAN

Configuration prerequisites

Before you configure a voice VLAN, complete the following tasks:
Create a VLAN

Configure QoS priority settings for voice VLAN traffic on an interface before enabling voice VLAN

on the interface.
If the configuration order is reversed, your priority configuration will fail. For more information, see
―Configuring QoS priority settings for voice traffic on an
Configure the voice VLAN assignment mode.

For more information, see
and ―Configuring a port to operate in manual voice VLAN assignment
NOTE:

A port can belong to only one voice VLAN at a time.

You cannot enable voice VLAN on a port where Link Aggregation Control Protocol (LACP) is enabled.
Configuring QoS priority settings for voice traffic on an
interface
In voice VLAN applications, you can improve the quality of voice traffic by configuring the appropriate
QoS priority settings, including the Class of Service (CoS) and Differentiated Services Code Point (DSCP)
values, for voice traffic. Voice traffic carries its own QoS priority settings. You can configure the device
either to modify or not to modify the QoS priority settings that the incoming voice traffic carries.
Follow these steps to configure QoS priority settings for voice traffic:
To do...
Enter system view
Enter interface view
Configure the interface to trust the
QoS priority settings in incoming
voice traffic, but not to modify the
CoS and DSCP values marked for
incoming traffic of the voice VLAN
Packet type
Packets that carry the
voice VLAN tag
Packets that carry other
tags
―Configuring a port to operate in automatic voice VLAN assignment
Use the command...
system-view
interface interface-type
interface-number
voice vlan qos trust
Packet processing mode
Forwarded or dropped depending on whether the port
allows packets of these VLANs to pass through.
interface.‖
Remarks
—
—
Required
Use either command
By default, an interface modifies the
CoS value and the DSCP value
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mode.‖
mode‖