3Com S7906E Command Reference Manual page 1732

Description
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.
Examples
# 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
Syntax
priority-queue-mapping { downstream | upstream} { value } &<1-8>
undo priority-queue-mapping { downstream | upstream}
View
OLT port view
Default Level
2: System level
Parameters
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.
Description
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
Table 6-1.
6-4