Scheduling Class Weighted Groups - Alcatel-Lucent 7450 Quality Of Service Manual

HSMDA Command Reference
scheduling-class class rate rate
no scheduling-class class
Context config>qos>hsmda-scheduler-policy
Description This command configures the behavior of a specific scheduling class on all HSMDA schedulers
associated with the policy. The scheduling-class command performs one of two operations, configure
a maximum rate for the scheduling class or place the scheduling class into one of the two available
weighted scheduling groups. The two operations are mutually exclusive.
By default, none of the scheduling classes are members of either weighted scheduling group and each
class is set to a rate limit of max (meaning that no rate limit is applied).
Specifying Scheduling Class Rate (or Removing Class from Group)
If the scheduling-class command is executed with the rate keyword specified, either max or a
specified megabits-per-second rate must follow. If class-id had previously been mapped into one of
the two weighted scheduling groups, the class will be removed. However, if removing the class from
the group will cause the group to no longer have contiguous class members, the command will fail with
no effect on the specified class. A non-contiguous grouping error will be returned specifying the
weighted group. The lowest or highest members within a weighted group must be removed prior to
removing the middle member. For example, if scheduling classes 3, 4 and 5 were members of weighted
group 1, class 4 can not be removed first.
The scheduling-class command using the rate keyword will also fail in the event where an override
for the group weight is in place on the scheduling class within a scheduler associated with the policy.
The override command is expecting the class to be associated with a weighted scheduling group and
the policy rate definition is attempting to remove the class from the group. An override mismatch error
will be generated specifying the scheduling object where the override exists (SAP, subscriber or
ingress HSMDA).
Once a rate has been successfully defined for a scheduling class, the specified rate is automatically
updated on all HSMDA scheduler instances associated with the scheduling policy. The exception is
where the scheduler instance has a local override for the rate on the scheduling class.
Specifying Scheduling Class Weighted Group Membership
If the scheduling-class command is executed with the group keyword specified, group-id must follow.
Two weighted scheduling groups are allowed, numbered 1 and 2. Along with the group, the weight
keyword is used to specify the weight the scheduling class within the group. If weight is not specified,
the default weight of 1 will be used. Similar to the rate action of the command, the group version will
fail if the scheduling class ID is not consecutive with the class members currently members of the
weighted scheduling group. The command will have no effect on the current scheduling class settings
and a non-contiguous grouping error will be returned specifying the weighted scheduling group and
the current group members.
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