Configuring Compound Shared Shaping Of Traffic; Compound Shared Shaping Overview; Supported Hardware For Compound Shared Shaping - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - QUALITY OF SERVICE CONFIGURATION GUIDE 2010-09-22 Configuration Manual

CHAPTER 12
Configuring Compound Shared Shaping
of Traffic

Compound Shared Shaping Overview

Supported Hardware for Compound Shared Shaping

Copyright © 2010, Juniper Networks, Inc.
This chapter provides information for configuring compound shared shaping of traffic
on the E Series router.
QoS topics are discussed in the following sections:
Compound Shared Shaping Overview on page 95
Configuring Compound Shared Shaping on page 96
Example: Compound Shared Shaping for ATM VCs on page 98
Example: Compound Shared Shaping for ATM VPs on page 100
Compound shared shaping is a hardware-assisted mode that can control bandwidth for
all scheduler objects associated with the subscriber logical interface. Thus it can manage
voice and video queues in addition to data queues, so that the shared rate cannot be
exceeded.
Compound shared shaping responds to changes in traffic rates more rapidly than simple
shared shaping, in the order of milliseconds.
You can configure compound shared shaping on a line module with the EFA2 or TFA
hardware.
The EFA2 implementation is different from the EFA ASIC, which does not implement
compound shared shaping. Issue the show qos shared-shaper command to determine
whether compound shared shapers are supported for the line module. Contact your
Juniper Networks account representative for more information about line modules with
the EFA2 ASIC.
The TFA hardware is only available on the ES2 10G LM on the E120 and E320 Broadband
Services Routers.
If you configure a compound shared shaper on hardware that does not support it, the
CLI displays the following message:
95