QoS Scheduler Policies
Quality of Service Guide 575
Up to eight groups can be defined within each port scheduler policy. One or more levels can map to
the same group. A group has a rate and optionally a cir-rate and inherits the highest scheduling priority
of its member levels. In essence, a group receives bandwidth from the port or from the vport and
distributes it within the member levels of the group according to the weight of each level within the
group.
Each priority level will compete for bandwidth within the group based on its weight under a congestion
situation. If there is no congestion, a priority level can achieve up to its rate (cir-rate) worth of
bandwidth.
CLI will enforce that mapping of levels to a group are contiguous. In other words, a user would not be
able to add priority level to group unless the resulting set of priority levels is contiguous.
The no form of the command removes the group from the port scheduler policy.
Parameters name — Specifies the name of the weighted scheduler group and can be up to 32 ASCII characters
in length.
create — This keyword is mandatory when creating the specified group.
percent-rate
Syntax percent-rate pir-percent [cir cir-percent]
no percent-rate
Context config>qos>port-scheduler-policy>group
Description The percent-rate command within the port scheduler policy group enables supports for a policer’s PIR
and CIR rate to be configured as a percentage of the immediate parent root policer/arbiter rate or the
FP capacity.
If the parent arbiter rate changes after the policer is created, the policer’s PIR and CIR rates will be
recalculated based on the defined percentage value.
The rate and percent-rate commands override one another. If the current rate for a policer is defined
using the percent-rate command and the rate command is executed, the percent-rate values are deleted.
In a similar fashion, the percent-rate command causes any rate command values to be deleted. A
policer’s rate may dynamically be changed back and forth from a percentage to an explicit rate at
anytime.
The no form of this command returns the queue to its default shaping rate and cir rate.
Parameters pir-percent — Specifies the policer’s PIR as a percentage of the immediate parent root policer/
arbiter rate or the FP capacity.
Values Percentage ranging from 0.01 to 100.00.
Default 100.00
To Next Page
Loading...
