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Choose the menu QoS→DiffServ→DSCP Priority to load the following page. 
 
Figure 11-9 DSCP Priority 
The following entries are displayed on this screen
: 
  DSCP Priority Config 
DSCP Priority:  Select Enable or Disable DSCP Priority. 
Select the desired DSCP value for DSCP priority configuration. It 
Indicates the priority determined by the DS region of IP datagram. 
It ranges from 0 to 63. 
Priority Level:  Indicates the 802.1P priority t
he packets with tag are mapped to. 
The priorities are labeled as CoS0 ~ CoS7. 
Configuration Procedure: 
Step  Operation  Description 
1 
Configure the mapping relation 
between the DSCP priority and 
802.1P priority 
Required.  On  QoS→DiffServ→DSCP Priority 
enable DSCP Priority and configure 
relation between the DSCP priority and CoS. 
2 
Configure the mapping relation 
between the CoS and the TC 
Required. On QoS→DiffServ→802.1P Priority 
configure the mapping rela
the TC. 
3  Select a schedule mode 
Required. On QoS→DiffServ→Schedule Mode