H3C Technologies H3C S3600 Series Switches - Manual (Page 141)

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Table 1-3 Matching relationship between port types and voice devices acquiring voice VLAN through
manual configuration
Voice VLAN
assignment mode
Port type Supported or not
Access Not supported
Trunk
Supported
Make sure the default VLAN of the port exists and is not a
voice VLAN, and the access port permits the traffic of the
default VLAN.
Automatic
Hybrid
Supported
Make sure the default VLAN of the port exists and is not a
voice VLAN, and the default VLAN is in the list of the tagged
VLANs whose traffic is permitted by the access port.
Access Not supported
Trunk
Supported
Make sure the default VLAN of the port exists and is not a
voice VLAN, and the access port permits the traffic of the
default VLAN.
Manual
Hybrid
Supported
Make sure the default VLAN of the port exists and is not a
voice VLAN, and the default VLAN and the voice VLAN is in
the list of the tagged VLANs whose traffic is permitted by the
access port.
Security Mode of Voice VLAN
On S3600 series Ethernet switches, a voice VLAN can operate in the security mode. Voice VLANs
operating in this mode only permit voice data, enabling you to perform voice traffic-specific priority
configuration. With the security mode disabled, both voice data and service data can be transmitted in a
voice VLAN.
Voice VLAN Configuration
Configuration Prerequisites
z Create the corresponding VLAN before configuring a voice VLAN.
z VLAN 1 (the default VLAN) cannot be configured as a voice VLAN.
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 carried by incoming voice traffic.
Follow these steps to configure QoS priority settings for voice traffic:
To do... Use the command... Remarks
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