26 
Figure 5 Network diagram 
 
 
Configuration procedure 
# Assign port priority to GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2. Make sure the following 
requirements are met:  
•  The priority of GigabitEthernet 1/0/1 is higher than that of GigabitEthernet 1/0/2.  
•  No trusted packet priority type is configured on GigabitEthernet 1/0/1 or GigabitEthernet 1/0/2. 
<AC> system-view 
[AC] interface gigabitethernet 1/0/1 
[AC-GigabitEthernet1/0/1] qos priority 3 
[AC-GigabitEthernet1/0/1] quit 
[AC] interface gigabitethernet 1/0/2 
[AC-GigabitEthernet1/0/2] qos priority 1 
[AC-GigabitEthernet1/0/2] quit 
 
Internet
Device A
AC
Server
GE1/0/1
IP precedence 3
GE1/0/2
IP precedence 
1
Device B
GE1/0/3
GE1/0/1
GE1/0/2