User guide

Packet Over SONET Module Installation and User Guide 3-45
Configuring QoS Functions
To configure the scheduling parameters for a specified QoS profile, use the following
command:
config qosprofile <qosprofile> {minbw <percent>} {maxbw <percent>}
{priority <level>} {minbuf <percent>} {maxbuf <percent>} {<portlist>}
{egress | ingress}
The optional egress and ingress keywords apply only to PoS ports. As stated earlier,
the PoS modules support eight egress queues and eight ingress queues per port, and the
scheduling parameters for these queues are controlled by QoS profiles qp1-qp8, which
means queue #0 is controlled by qp1, queue #1 is controlled by qp2, and so on.
The optional
portlist parameter allows QoS profiles to be customized on a
port-by-port basis for the PoS modules. The
egress and ingress keywords allow you
to fine-tune the customization (down to a particular egress or ingress queue on a given
port). If you do not enter either the
egress or ingress keyword in the command, the
configured parameters apply to the egress queue associated with the specified QoS
profile by default.
The
minbw parameter specifies the minimum percentage of the bandwidth guaranteed
to be available to the specified queue for transmissions from the QoS profile. The value
is an integer in the range from 0 through 100. The default value is 0. The sum of the
minimum bandwidth parameters across all eight QoS profiles cannot exceed 90%.
The
maxbw parameter specifies the maximum percentage of the bandwidth that the
specified queue can use for transmissions from the QoS profile. The value is an integer
in the range from 1 through 100. The default value is 100.
The optional priority keyword and level parameter specify the service priority for
the specified queue. The service priority determines which traffic is scheduled when
bandwidth is still available after the minimum requirements of all profiles have been
satisfied. Settings for
level include: low, lowHi, normal, normalHi, medium,
mediumHi, high, or highHi. The default setting is low.
The
minbuf and maxbuf keywords do not apply to PoS ports.