Juniper JUNOSE 11.1.X - QUALITY OF SERVICE CONFIGURATION GUIDE 3-21-2010, Configuration Manual

Page: 191 / 398

Chapter 19
Configuring an Integrated Scheduler to
Provide QoS for ATM
This chapter provides information for configuring an integrated scheduler to provide
QoS for ATM.
QoS topics are discussed in the following sections:
■
ATM Integrated Scheduler Overview on page 159
■
Integrating the HRR Scheduler and SAR Scheduler on page 161
■
Per-Packet Queuing on the SAR Scheduler Overview on page 163
■
Guidelines for Configuring QoS over ATM on page 166
■
Configuring Default Integrated Mode for ATM Interface on page 168
■
Configuring Low-Latency Mode for Per-Port Queuing on ATM
Interfaces on page 169
■
Configuring Low-CDV Mode for Per-Port Queuing on ATM Interfaces on page 171
■
Configuring the QoS Shaping Mode for ATM Interfaces on page 174
■
Disabling Per-Port Queuing on ATM Interfaces on page 175
■
Monitoring QoS Configurations for ATM on page 175
ATM Integrated Scheduler Overview
The E Series Broadband Services Router provides extended ATM QoS functionality
through its integrated scheduler. The integrated scheduler consists of two schedulers
in series—the hierarchical round robin (HRR) scheduler and the segmentation and
reassembly (SAR) scheduler.
The integrated scheduler enables you to configure QoS on your ATM networks using
the HRR scheduler that is used on all E Series ASIC-enabled line modules. In addition,
you can use the commercial SAR scheduler to configure traditional ATM cell-based
QoS.
ATM Integrated Scheduler Overview
■ 159