Инструкции По Установке для 3com S7906E

 

7 

Table 12-2 Configure QoS at the ONU side of an EPON system 

Configuring traffic classification and 
CoS priority marking for incoming 
packets on UNIs 

Priority mapping on the UNI 

Configure priority trust mode for the 
ONU 

Configuring the Priority Trust 
Mode on a Port 

Configuring traffic policing for uplink 
traffic of a UNI 

Configure QoS for uplink 
traffic 

Configure congestion management 
for the uplink port of an ONU 

Configuring SP Queuing 

Configure the ONU to perform 
priority mapping for downlink traffic 
from the OLT according to the 
CoS-to-local precedence mapping 
table 

Set the ONU port priority 

Configuring the Priority Trust 
Mode on a Port 

Configure QoS for downlink 
traffic 

Configuring traffic policing for 
downlink traffic of a UNI 

 

Follow these steps to modify the 802.1p-to-local mapping on the OLT port: 

Enter system view 

system-view 

— 

Enter OLT port view 

interface interface-type interface-number 

— 

Modify the 802.1p-to-local 
mapping on the OLT port for 
downlink or uplink traffic 

priority-queue-mapping { downstream | 
upstream } { value } &<1-8> 

Optional 

For the default 
mapping, see 

.  

 

For traffic to be sent out an OLT port, you can set the priority threshold to identify high-priority traffic and 

low-priority traffic. You can set sending buffer to reserve buffer for high-priority queues and thus 

decrease the dropping probability of high-priority packets and guarantee QoS for high-priority packet 

transmission. The sending buffer does not apply to low-priority queues.  

You need to set the buffer parameters for high-priority packets in OLT port view and then enable 

high-priority packet buffering for the specified ONU in ONU port view. After the configurations, when the 

OLT sends traffic to the specified ONU, high-priority packet buffering is enabled and so that high-priority 

packets can be sent preferentially.