R3303-HP HSR6800 Routers Layer 2 - LAN Switching Configuration Guide

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Table 16 How a voice VLAN-enabled port processes packets in security and normal mode

Voice VLAN mode Packet

rocessin

mode

Security 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

Normal mode

• 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

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 a

n interface."

• Configure the voice VLAN assignment mode.

For more information, see "Configuring a port to operate in automatic voice VLAN assignment

mode" and "Configuring a port to operate in manual voice VLAN assignment mode."

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.

Configure the QoS priority settings for voice traffic on an interface before you enable voice VLAN on the

interface. If the configuration order is reversed, your priority trust setting will fail.

To configure QoS priority settings for voice traffic:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enter Layer 2 Ethernet

interface view.

interface interface-type

interface-number

N/A