Configuration Prerequisites; Configuring Qos Priority Settings For Voice Traffic On An Interface - HP 6600 Configuration Manual

Security mode—Only voice packets whose source MAC addresses match the recognizable OUI
•
addresses can pass through the voice VLAN-enabled inbound port, but all other packets are
dropped.
In a safe network, you can configure the voice VLANs to operate in normal mode, which reduces the
system resources used for checking source MAC addresses.
based on different security modes.
HP recommends not transmitting both voice traffic and non-voice traffic in a voice VLAN. If you must
transmit both voice traffic and nonvoice traffic, make sure the voice VLAN security mode is disabled.
Table 16 How a voice VLAN-enabled port processes packets in security and normal mode
Voice VLAN mode
Security mode
Normal mode

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
mode" and
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 CoS and 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.
Packet processing mode
•
For untagged packets and packets that carry the voice VLAN tag:
If the source MAC address of a packet matches an OUI address configured for the
device, it is forwarded in the voice VLAN. Otherwise, it is dropped.
•
For packets that carry other tags:
Forwarded or dropped depending on whether the port allows packets of these
VLANs to pass through
•
For untagged packets and packets that carry the voice VLAN tag:
The port does not determine the source MAC addresses of inbound packets. In this
way, both voice traffic and non-voice traffic can be transmitted in the voice VLAN.
•
For packets that carry other tags:
Forwarded or dropped depending on whether the port allows packets of these
VLANs to pass through
"Configuring a port to operate in automatic voice VLAN assignment
"Configuring a port to operate in manual voice VLAN assignment
Table 16
interface."
122
shows how packets are handled
mode."