Table 32: Access Loop Types And Resultant Shaping Mode; Qos Adaptive Mode And Downstream Rate; Obtaining Downstream Rates From A Dsl Forum Vsa - Juniper JUNOSE 11.1.X - QUALITY OF SERVICE CONFIGURATION GUIDE 3-21-2010 Configuration Manual

JUNOSe 11.1.x Quality of Service Configuration Guide

QoS Adaptive Mode and Downstream Rate

After you create the parameter definition, you must enable QoS adaptive mode for
ANCP by issuing the qos-adaptive-mode command. ANCP uses this setting to
dynamically create the parameter instances for the QoS downstream rate application
and, if applicable, the QoS cell mode application. It also uses the setting to determine
the value that the system uses when recalculating the shaping rate.
For example, if you created a parameter definition with the QoS cell mode application,
ANCP configures parameter instances associated with a value of 0 to indicate a
frame-oriented DSL types such as VDSL2. ANCP configures cell-oriented DSL types
such as ADSL with a value of 1.
Table 32 on page 302 lists the DSL types, interface type, and resultant shaping modes
that ANCP configures when creating a parameter instance for the QoS cell mode
application.

Table 32: Access Loop Types and Resultant Shaping Mode

Obtaining Downstream Rates from a DSL Forum VSA

You can configure the QoS downstream rate application to shape VLANs or ATM VCs
based on downstream rates obtained from the Actual-Data-Rate-Downstream [26-130]
DSL Forum vendor-specific attribute (VSA).
Related Topics
302
QoS Downstream Rate Application Overview
Access Loop Access Loop
Type Interface Type
ADSL1 ATM
ADSL2 ATM
ADSL2+ ATM
VDSL1 ATM
VDSL2 Ethernet
SDSL/SHDSL ATM
Configuring a Parameter Definition for QoS Downstream Rate on page 303
Example: QoS Parameter Configuration for QoS Downstream Rate on page 305
For more information about configuring the shaping mode for Ethernet interfaces,
see QoS Shaping Mode for Ethernet Interfaces Overview on page 178 and Cell
Shaping Mode Using QoS Parameters Overview on page 281
For more information about configuring byte adjustment for downstream rates,
see Byte Adjustment for ADSL and VDSL Traffic Overview on page 293
Shaping Mode
Cell
Cell
Cell
Cell
Frame
Cell