Configuring Rates And Weights In The Scheduler Hierarchy; Rate Shaping And Port Shaping Overview; Figure 9: Port Shaping On An Ethernet Module - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual

CHAPTER 7
Configuring Rates and Weights in the
Scheduler Hierarchy

Rate Shaping and Port Shaping Overview

Figure 9: Port Shaping on an Ethernet Module

Copyright © 2010, Juniper Networks, Inc.
This chapter provides information for configuring shaping rates, assured rates, and weights
in the QoS scheduler hierarchy using scheduler profiles.
QoS topics are discussed in the following sections:
Rate Shaping and Port Shaping Overview on page 51
Configuring Rate Shaping for a Scheduler Node or Queue on page 52
Configuring Port Shaping on page 52
Static and Hierarchical Assured Rate Overview on page 53
Configuring an Assured Rate for a Scheduler Node or Queue on page 54
Configuring the HRR Weight for a Scheduler Node or Queue on page 56
Rate shaping throttles the rate at which queues transmit packets. Rate shaping is TCP
friendly; that is, it buffers packets that are above the rate, rather than dropping them.
Port shaping enables you to shape the aggregate traffic through a port or channel to a
rate that is less than the line or port rate. With port shaping, you can configure scheduler
nodes at the port level, as shown in Figure 9 on page 51.
51