Chapter 30 Configuring The Downstream Rate Using Qos Parameters; Qos Downstream Rate Application Overview; Downstream Rate And The Shaping Mode - Juniper JUNOSE 11.1.X - QUALITY OF SERVICE CONFIGURATION GUIDE 3-21-2010 Configuration Manual

Chapter 30
Configuring the Downstream Rate Using
QoS Parameters

QoS Downstream Rate Application Overview

Downstream Rate and the Shaping Mode

This chapter provides information for configuring quality of service (QoS) parameters
on E Series routers.
QoS parameters are discussed in the following sections:
QoS Downstream Rate Application Overview on page 301
Guidelines for Configuring QoS Downstream Rate on page 303
Configuring a Parameter Definition for QoS Downstream Rate on page 303
Example: QoS Parameter Configuration for QoS Downstream Rate on page 305
You can associate the QoS downstream rate (qos-downstream-rate) application with
a parameter definition. The QoS downstream rate application enables you to shape
the downstream rate of VLANs and ATM VCs based on parameter instances that are
created dynamically by the Access Node Control Protocol (ANCP), also known as the
layer 2 control (L2C) protocol, or the Actual-Data-Rate-Downstream [26-130] DSL
Forum vendor-specific attribute (VSA). The values of the parameter instances track
the bandwidth of the local loop that is communicated by ANCP or the [26-130] VSA.
After you configure a parameter definition with the QoS downstream rate application,
you can configure the shaping mode for the VLAN or ATM VC. For ATM VCs, use the
qos-shaping-mode command.
For VLANs, you can use the QoS cell mode application with QoS parameters to
perform a cell mode adjustment. ANCP creates instances of the parameter based on
the DSL type of the local loop associated with the VLAN.
VLANs configured on the ES2 4G LM on the E120 and E320 Broadband Services
routers use an internal cell-taxing mechanism to perform the cell mode adjustment.
For VLANs configured on all other E Series Broadband Services Routers, you must
also configure a parameter expression to configure the cell mode adjustment.
QoS Downstream Rate Application Overview
301