Table 22: Qos Parameter Terminology Used In This Chapter; Qos Parameter Terms - Juniper JUNOSE 11.1.X - QUALITY OF SERVICE CONFIGURATION GUIDE 3-21-2010 Configuration Manual

JUNOSe 11.1.x Quality of Service Configuration Guide
QoS administrators are responsible for implementing a QoS queuing architecture by
defining the scheduler profiles and referencing them from QoS profiles. QoS
administrators also configure parameter definitions that control the parameters,
interfaces, and ranges of values that QoS clients, using QoS parameters, can assign.
QoS clients are responsible for configuring services for individual subscribers by
creating parameter instances. The parameter instances that QoS clients create depend
on the settings that the QoS administrator defined in parameter definitions. QoS
clients can use the CLI, Session and Resource Control (SRC), IP multicast bandwidth
adjustment, RADIUS, or Service Manager to manage these services.
Related Topics

QoS Parameter Terms

Table 22 on page 226 defines terms used in this discussion of QoS parameters.

Table 22: QoS Parameter Terminology Used in This Chapter

226
QoS Parameter Terms
QoS Parameter Overview on page 225
Relationship Among QoS Parameters, Scheduler Profiles, and QoS Profiles on
page 227
Term Description
Downreference QoS feature that controls a node or queue lower in the scheduler
hierarchy. For example, a QoS profile that is attached to an ATM
virtual circuit (ATM VC) modifies QoS settings on ATM virtual path
(VP) nodes. You cannot configure downreferences for QoS
parameters. We also recommend that you do not configure
downreferences for QoS profiles.
Explicit parameter Hierarchical parameter instance whose value is explicitly specified
instance by a client. This term is meaningful only when referring to
hierarchical parameter instances; non-hierarchical parameter
instances are always explicit.
Hierarchical parameter Parameter with both explicit instances that are configured by a QoS
client, and with implicit instances that are automatically generated
for all controlled interfaces. The value for the implicit instance is the
sum of the explicit instances for interfaces stacked above the
controlled interface.
Implicit parameter Hierarchical parameter instance where the value is the sum of explicit
instance parameter instances on scheduler nodes and queues stacked above
them in the scheduler hierarchy.
Parameter definition Definition of a parameter name and attributes that a QoS
administrator creates.
Parameter expression Parameters used in conjunction with operators. Scheduler profiles
reference a parameter definition name within a parameter
expression.