Voice Vlan Tasks At A Glance; Configuring The Qos Priority Settings For Voice Traffic - H3C S6850 Series Configuration Manual

aging timer for its dynamic MAC address entry. For more information about the aging timer for
dynamic MAC address entries, see "Configuring the MAC address table."
As a best practice, do not both configure voice VLAN and disable MAC address learning on a port. If
the two features are configured together on a port, the port forwards only packets exactly matching
the OUI addresses and drops inexactly matching packets.
As a best practice, do not configure both voice VLAN and the MAC learning limit on a port. If the two
features are configured together on a port and the port learns the configured maximum number of
MAC address entries, the port processes packets as follows:
•
Forwards only packets matching the MAC address entries learnt by the port and OUI
addresses.
•
Drops unmatching packets.

Voice VLAN tasks at a glance

To configure a voice VLAN, perform the following tasks:
1.

Configuring the QoS priority settings for voice traffic

2. 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
3. (Optional.)
4. (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
About 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.
Restrictions and guidelines
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.
If you execute the voice-vlan qos and voice-vlan qos trust commands multiple times,
the most recent configuration takes effect.
Procedure
1. Enter system view.
system-view
2. Enter Layer 2 Ethernet interface view.
interface interface-type interface-number
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.
Enabling LLDP for automatic IP phone discovery
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