Alcatel-Lucent 7950 Quality Of Service Manual page 503

group
Syntax group name [create]
no group name
Context config>qos>port-scheduler-policy
Description
This command defines a weighted scheduler group within a port scheduler policy.
The port scheduler policy defines a set of eight priority levels. The weighted scheduler group allows for the
application of a scheduling weight to groups of child queues competing at the same priority level of the port
scheduler policy applied to a vport defined in the context of the egress of an Ethernet port or applied to the
egress of an Ethernet port.
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.
Note that 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
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.
7950 XRS Quality of Service Guide Page 503