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Tasks at a glance
(Required.) Use one of the following methods:
• Configuring a port to operate in automatic voice VLAN assignment mode
• Configuring a port to operate in manual voice VLAN assignment mode
(Optional.) Enabling LLDP for automatic IP phone discovery
(Optional.) Use one of the following methods:
• Configuring LLDP to advertise a voice VLAN
• Configuring CDP to advertise a voice VLAN
Configuring the QoS priority settings for voice
traffic
The QoS priority settings carried in voice traffic include the CoS and DSCP values. You can
configure the device to modify the QoS priority settings for voice traffic.
You cannot configure the QoS priority settings on a voice VLAN-enabled port. Before you configure
the QoS priority settings for voice traffic on a port, you must disable the voice VLAN feature on it.
To configure the QoS priority settings for voice traffic:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Enter interface view.
• Enter Layer 2 Ethernet interface
view:
interface interface-type
interface-number
• Enter Layer 2 aggregate interface
view:
interface bridge-aggregation
interface-number
N/A
3. Configure QoS
priority settings for
incoming voice
VLAN packets.
• Configure the port to trust the QoS
priority settings:
voice-vlan qos trust
• Configure the port to modify the CoS
and DSCP values:
voice-vlan qos cos-value
dscp-value
By default, a port modifies the
CoS and DSCP values for voice
VLAN packets to 6 and 46,
respectively.
If a port trusts the QoS priority
settings in incoming voice VLAN
packets, the port does not modify
their CoS and DSCP values.
If you execute the
voice-vlan qos
and
voice-vlan qos trust
commands multiple times, the
most recent configuration takes
effect.
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