Инструкции По Установке для 3com S7906E

 

3-3 

For an MPLS packet, the priority mapping procedure as shown in 

 is adopted: 

Figure 3-2 Priority mapping procedure for an MPLS packet 

Receive a 

packet

Look up the 

exp-dp table

Mark the packet 

with drop 

precedence

Look up the 

exp-dot1p table

Mark the packet 

with new 802.1p

priority

Look up the 

dot1p-lp table

Mark the packet 

with local 

precedence

Schedule the packet 

according to its local 

precedence and drop 

precedence

 

 

The priority mapping procedure presented above applies in the absence of priority marking. If priority 

marking is configured, the device performs priority marking before priority mapping, and then uses the 

re-marked packet-carried priority for priority mapping or directly uses the re-marked scheduling priority 

for traffic scheduling depending on your configuration. In this case, neither priority trust mode 

configuration on the port nor port priority configuration takes effect.  

 

You are recommended to plan QoS throughout the network before making QoS configuration.  

Complete the following task to configure priority mapping: 

Configuring a Priority Mapping Table 

Optional 

Configuring the Priority Trust Mode on a Port 

Optional 

Configuring the Port Priority of a Port 

Optional