H3C S7500E Series Configuration Manual page 97

Sending buffer size of the OLT port
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.
You can enable high-priority packet buffering for multiple ONUs, and the OLT will reserve an
independent buffer for each ONU.
Follow these steps to configure rate limiting:
To do...
Enter system view
Enter OLT port view
Configure the priority threshold
and enable high-priority packet
buffering
Return to system view
Enter ONU port view
Reserve high-priority buffer for
the current ONU
Use the command...
system-view
interface interface-type interface-number
bandwidth downstream priority-queue priority
high-priority-reserved value
quit
interface interface-type interface-number
bandwidth downstream high-priority enable
13-8
Remarks
—
—
Required
The downlink packets
on an OLT port are
considered
high-priority only if
their priority is greater
then or equal to the
priority value.
The value argument
is in bytes.
By default, no buffer
is reserved for
high-priority packets.
—
—
Optional
By default, the OLT
reserves no
high-priority buffer for
an ONU.