Scheduler Profiles And Parameter Expressions For Qos Administrators; Referencing A Parameter Definition In A Scheduler Profile; Removing Or Modifying A Scheduler Profile; Using Expressions For Qos Parameters - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual

Scheduler Profiles and Parameter Expressions for QoS Administrators

Referencing a Parameter Definition in a Scheduler Profile

Using Expressions for QoS Parameters

Copyright © 2010, Juniper Networks, Inc.
Cell Shaping Mode Using QoS Parameters Overview on page 265
Byte Adjustment for ADSL and VDSL Traffic Overview on page 275
QoS Downstream Rate Application Overview on page 283
After you have created the parameter definition, you reference the parameter within a
scheduler profile. You can choose to use parameter expressions in the scheduler profile.
You can reference a parameter in a scheduler profile as long as all parameters in the
scheduler profile share at least one controlled-interface type. Otherwise, a QoS profile
rule cannot reference the scheduler profile.
For example:
host1(config)#qos-parameter-define max-subscriber-bandwidth
host1(config-qos-parameter-define)#controlled-interface-type vlan
host1(config-qos-parameter-define)#exit
host1(config)#scheduler-profile subscriber
host1(config-scheduler-profile)#shared-shaping-rate max-subscriber-bandwidth auto
When a scheduler profile references a parameter, the system implicitly assigns
controlled-interface types to the scheduler profile that are the same as the
controlled-interface types of all referenced parameters. The system validates scheduler
profile types using the QoS profile rules that refer to those scheduler profiles. For example,
if the parameter definition max-sub-bw has the controlled-interface types atm-vc and
ip, the scheduler profile cannot be referenced in QoS profile rules that have a type other
than atm-vc or ip.

Removing or Modifying a Scheduler Profile

You can modify a scheduler profile as long as the QoS profile rules that use the scheduler
profile are of the same type. All nodes and queues controlled by the scheduler profile
are adjusted to the new rate.
You can also remove a parameter reference from a scheduler profile. The system modifies
the nodes and queues that are controlled by the scheduler profile with the new rate.
Expressions are combinations of parameter names, constants, and operators. You can
specify some scheduler profile attributes using an expression, such as the shaping rate.
All operations within expressions are performed using 64 bit unsigned math, resulting in
a 32 bit, signed integer value.
Expressions consist of both operators and operand values. Operators are arithmetic
functions, and operand values are the inputs for the mathematical function. Operand
values can be a parameter name or an integer. You specify an expression consisting of
an operand, followed by zero or more [ operator, operand ] pairs.
Chapter 25: Configuring a QoS Parameter
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