3com S7906E Instruccion De Instalación

 

4-5 

Add a recognizable OUI 
address 

voice vlan mac-address oui 
mask oui-mask [ description 
text ] 

Optional 

By default, each voice VLAN 
has default OUI addresses 
configured. Refer to 

 

for the default OUI addresses 
of different vendors. 

Enter Ethernet interface view 

interface interface-type 
interface-number 

— 

Configure the port to operate in 
automatic voice VLAN 
assignment mode 

Optional 

Automatic voice VLAN 
assignment mode is enabled by 
default.  

The voice VLAN assignment 
modes on different ports are 
independent of one another. 

Enable voice VLAN on the port 

voice vlan vlan-id enable 

Required 

Not enabled by default 

 

A protocol-based VLAN on a hybrid port can process only untagged inbound packets, whereas the 

voice VLAN in automatic mode on a hybrid port can process only tagged voice traffic. Therefore, do not 

configure a VLAN as both a protocol-based VLAN and a voice VLAN. For more information, refer to 

.  

 

In order to improve transmission quality of voice traffic, the device by default does not trust the priority 

carried in voice VLAN traffic and re-marks the priority of the traffic in the voice VLAN as follows:  

z 

Set the CoS (802.1p) priority to 6.  

z 

Set the DSCP value to 46.  

You can tune the priority values marked for incoming voice VLAN traffic on an interface. Alternatively, 

you can configure the interface to trust and use the priority carried in incoming voice VLAN traffic 

instead.  

Follow these steps to configure the priority trust setting for voice VLAN traffic on an interface: 

Enter system view 

— 

Enter interface view 

interface interface-type 
interface-number 

—