Configuring Hierarchical Qos Parameters; Hierarchical Qos Parameters Overview; Guidelines For Configuring Hierarchical Parameters - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual

CHAPTER 26

Configuring Hierarchical QoS Parameters

Hierarchical QoS Parameters Overview

Related
Documentation

Guidelines for Configuring Hierarchical Parameters

Copyright © 2010, Juniper Networks, Inc.
This chapter provides information for configuring hierarchical quality of service (QoS)
parameters on E Series routers.
QoS parameters are discussed in the following sections:
Hierarchical QoS Parameters Overview on page 245
Guidelines for Configuring Hierarchical Parameters on page 245
Configuring a Parameter Definition to Calculate Hierarchical Instances on page 246
Example: QoS Parameter Configuration for Hierarchical Parameters on page 247
You use hierarchical parameters in applications where you want the system to add
instances associated with child interfaces and associate the sum with a parent interface.
For example, to shape an S-VLAN to 50 percent of the sum of the shaping rates of the
VLANs stacked above the S-VLAN, you specify explicit instances of the parameter
associated with the VLANs, and the system creates an implicit instance of the parameter
associated with the S-VLAN. The parameter maintains the value of the sum of the explicit
instances.
The most common use of hierarchical parameters is in combination with the IP multicast
bandwidth adjustment application.
For example, you create a hierarchical parameter that controls a VLAN. The hierarchical
parameter has two explicit parameter instances on two IP interfaces, with values of
1 Mbps and 3 Mbps. Therefore, an implicit parameter instance is created at the VLAN
interface with a value of 4 Mbps.
Configuring a Parameter Definition to Calculate Hierarchical Instances on page 246
For information about the IP multicast bandwidth adjustment application, see IP
Multicast Bandwidth Adjustment for QoS Overview on page 253
Use the following guidelines when specifying a hierarchical parameter:
245