3com S7906E Guide De Référence

 

6-4 

Use the bandwidth downstream priority-queue command to configure thresholds for high-priority 

queues and reserve user-defined buffer sizes for high-priority queues based on the thresholds.  

Use the undo bandwidth downstream priority-queue high-priority-reserved command to cancel 

the configuration.  

By default, no priority threshold or buffer size is set for high-priority packet buffer.  

The downlink packets on an OLT port are considered as high-priority only if their priority is greater than 

or equal to the priority value.  

This command just configures buffer parameters. To make these parameters take effect, use the 

bandwidth downstream high-priority enable command to enable high-priority packet buffer for the 

specified ONU.  

# Reserve 100 bytes of buffer for the packets whose priorities are greater than or equal to 3.  

<Sysname> system-view 

[Sysname] interface olt 3/0/1 

[Sysname-Olt3/0/1] bandwidth downstream priority-queue 3 high-priority-reserved 100 

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

undo priority-queue-mapping { downstream | upstream} 

OLT port view 

2: System level 

downstream: Downlink packets.  

upstream: Uplink packets. 

value : Local precedence, in the range 0 to 7.  

&<1-8>: Indicates that you can specify up to eight priority queue values. 

Use the priority-queue-mapping  command to configure the mapping between the CoS precedence 

and local precedence of uplink and downlink packets on the OLT port.  

Use the undo priority-queue-mapping command to restore the default mapping between CoS 

precedence and local precedence of uplink and downlink packets on the OLT port.  

The default mapping between CoS precedence and local precedence on an OLT port is as shown in