183 
  NOTE: 
•  Confi
ure the QoS priority settin
s for voice VLAN traffic on an interface before enablin
 voice VLAN
on the interface. If the configuration order is reversed, the priority settings will fail.  
•  The voice vlan qos command and the voice vlan qos trust command can overwrite the other. When
you
execute the two commands on a port multiple times, the one that was last executed takes effect. 
 
Examples 
# Configure interface GigabitEthernet 1/0/1 to modify the CoS value and the DSCP value marked for 
voice VLAN packets into 5 and 45 respectively.  
<Sysname> system-view 
[Sysname] interface gigabitethernet 1/0/1 
[Sysname-GigabitEthernet1/0/1] voice vlan qos 5 45 
voice vlan qos trust 
Syntax 
voice vlan qos trust 
undo voice vlan qos 
View 
Interface view 
Default level 
2: System level 
Parameters 
None 
Description 
Use the voice vlan qos trust command to configure the current interface to trust the priority settings 
carried in incoming voice traffic. With this command configured, an interface keeps the CoS and DSCP 
values marked for incoming voice traffic unchanged. 
Use the undo voice vlan qos command to restore the default.  
By default, an interface modifies the CoS value and the DSCP value marked for voice VLAN traffic into 
6 and 46 respectively. 
Related commands: voice vlan qos. 
 
  NOTE: 
•  Configure the QoS priority trust mode for voice VLAN traffic on an interface before enabling voice 
VLAN on the interface. If the configuration order is reversed, your priority trust setting will fail.  
•  The voice vlan qos command and the voice vlan qos trust command can overwrite the other. After you
execute the two commands on a port multiple times, the one that was last executed takes effect. 
 
Examples 
# Configure interface GigabitEthernet 1/0/1 to trust the priority settings carried in incoming voice VLAN 
traffic.  
<Sysname> system-view