JUNOSe 9.1.x Quality of Service Configuration Guide > Table of Contents

Table of Contents

About This Guide

Objectives

Audience

E-series Routers

Documentation Conventions

Related E-series and JUNOSe Documentation

E-series and JUNOSe Documents

JUNOSe Configuration Guides

Obtaining Documentation

Documentation Feedback

Requesting Technical Support

Quality of Service Overview

QoS on the E-series Router Overview

QoS Audience

QoS Platform Considerations

Interface Specifiers

QoS Terms

QoS Features

Configuring QoS on the E-series Router

QoS References

Defining Service Levels with Traffic Classes and Traffic-Class Groups

Traffic Class and Traffic-Class Groups Overview

Best-Effort Forwarding

Traffic-Class Groups Overview

Configuring Traffic Classes That Define Service Levels

Configuring Traffic-Class Groups That Define Service Levels

Monitoring Traffic Classes and Traffic-Class Groups for Defined Levels of Service

Configuring Queue Profiles for Buffer Management

Queuing and Buffer Management Overview

Static Oversubscription

Dynamic Oversubscription

Color-Based Thresholding

Memory Requirements for Queue and Buffers

Guidelines for Managing Queue Thresholds

Guidelines for Configuring a Maximum Threshold

Guidelines for Configuring a Minimum Threshold

Guidelines for Managing Buffers

Guidelines for Managing Buffer Starvation

Configuring Queue Profiles to Manage Buffers and Thresholds

Monitoring Queues and Buffers

Configuring Dropping Behavior with RED and WRED

Dropping Behavior Overview

RED and WRED Overview

Configuring RED

Example: Configuring Average Queue Length for RED

Example: Configuring Dropping Thresholds for RED

Example: Configuring Color-Blind RED

Configuring WRED

Example: Configuring Different Treatment of Colored Packets for WRED

Example: Defining Different Drop Behavior for Each Traffic Class for WRED

Example: Configuring WRED and Dynamic Queue Thresholds

Monitoring RED and WRED

Gathering Statistics for Rates and Events in the Queue

QoS Statistics Overview

Rate Statistics

Event Statistics

Configuring Statistic Profiles for QoS

Configuring Rate Statistics

Configuring Event Statistics

Clearing QoS Statistics on the Egress Queue

Clearing QoS Statistics on the Fabric Queue

Monitoring QoS Statistics for Rates and Events

QoS Scheduler Hierarchy Overview

Scheduler Hierarchy Overview

Shaping Rates, Assured Rates, and Relative Weights in a Scheduler Hierarchy

Configuring a Scheduler Hierarchy

Configuring a Scheduler Profile for a Scheduler Node or Queue

Using Expressions for Bandwidth and Burst Values in a Scheduler Profile

Configuring Rates and Weights in the Scheduler Hierarchy

Rate Shaping and Port Shaping Overview

Configuring Rate Shaping for a Scheduler Node or Queue

Configuring Port Shaping

Static and Hierarchical Assured Rate Overview

Configuring an Assured Rate for a Scheduler Node or Queue

Configuring a Static Assured Rate

Configuring a Hierarchical Assured Rate

Changing the Assured Rate to an HRR Weight

Configuring the HRR Weight for a Scheduler Node or Queue

Configuring Strict-Priority Scheduling

Strict-Priority and Relative Strict-Priority Scheduling Overview

Relative Strict-Priority Scheduling Overview

Comparison of True Strict Priority with Relative Strict Priority Scheduling

Schedulers and True Strict Priority

Schedulers and Relative Strict Priority

Relative Strict Priority on ATM Modules

Oversubscribing ATM Ports

Minimizing Latency on the SAR Scheduler

HRR Scheduler Behavior and Strict-Priority Scheduling

Zero-Weight Queues

Setting the Burst Size in a Shaping Rate

Special Shaping Rate for Nonstrict Queues

Configuring Strict-Priority Scheduling

Configuring Relative Strict-Priority Scheduling for Aggregate Shaping Rates

Shared Shaping Overview

Shared Shaping Overview

Shared Shaper Terms

How Shared Shaping Works

Active Constituents for Shared Shaping

Guidelines for Configuring Simple and Compound Shared Shaping

Shared Shaping and Individual Shaping

Shared Shaping and Best-Effort Queues and Nodes

ATM and Shared Shaping

Sharing Bandwidth with the SAR

Shared Shaping and Low-CDV Mode

Logical Interface Traffic Carried in Other Queues

Traffic Starvation and Shared Shaping

Oversubscription and Shared Shaping

Burst Size and Shared Shaping

Configuring Simple Shared Shaping of Traffic

Simple Shared Shaping Overview

Bandwidth Allocation for Simple Shared Shaping

Simple Shared Shaping on the Best-Effort Scheduler Node

Simple Shared Shaping for Triple-Play Networks

Configuring Simple Shared Shaping

Example: Simple Shared Shaping for ATM VCs

Example: Simple Shared Shaping for ATM VPs

Example: Simple Shared Shaping for Ethernet

Configuring Variables in the Simple Shared Shaping Algorithm

Simple Shared Shaping Algorithm Overview

Simple Shared Shaper Algorithm Calculations

Variables of the Simple Shared Shaper Algorithm

Guidelines for Controlling the Simple Shared Shaper Algorithm

Configuring Simple Shared Shaper Algorithm Variables

Sample Process for Controlling the Simple Shared Shaper Algorithm

Configuring Compound Shared Shaping of Traffic

Compound Shared Shaping Overview

Supported Hardware for Compound Shared Shaping

Bandwidth Allocation for Compound Shared Shaping

Configuring Compound Shared Shaping

Example: Compound Shared Shaping for ATM VCs

Example: Compound Shared Shaping for ATM VPs

Configuring Implicit and Explicit Constituent Selection for Shaping

Constituent Selection for Shared Shaping Overview

Types of Shared Shaper Constituents

Implicit Constituent Selection Overview

Implicit Bandwidth Allocation for Compound Shared Shaping

Weighted Compound Shared Shaping Example

Configuring Implicit Constituents for Simple or Compound Shared Shaping

Explicit Constituent Selection Overview

Explicit Shared Shaping Example

Explicit Weighted Compound Shared Shaping Example

Configuring Explicit Constituents for Simple or Compound Shared Shaping

Monitoring a QoS Scheduler Hierarchy

Monitoring QoS Scheduling and Shaping

QoS Profile Overview

QoS Profile Overview

Managing System Resources for Nodes and Queues

Scaling Subscribers on the TFA ASIC with QoS

Configuring and Attaching QoS Profiles to an Interface

Supported Interface Types for QoS Profiles

Configuring a QoS Profile

Attaching a QoS Profile to an Interface

Attaching a QoS Profile to a Base Interface

Attaching a QoS Profile to an ATM VP

Attaching a QoS Profile to an S-VLAN

Attaching a QoS Profile to a Port Type

Munged QoS Profile Overview

Sample Munged QoS Profile Process

Example: Port-Type QoS Profile Attachment

Example: QoS Profile Attachment to Port

Example: Diffserv Configuration with Multiple Traffic-Class Groups

Configuring Shadow Nodes for Queue Management

Shadow Node Overview

Shadow Nodes and Scheduler Behavior

Managing System Resources for Shadow Nodes

Configuring Shadow Nodes

Example: Shadow Nodes over VLAN and IP Queues

Example: Shadow Nodes on the Same Traffic-Class Group

Example: Shadow Nodes on Different Traffic-Class Groups

Monitoring a Scheduler Hierarchy on an Interface with QoS Profiles

Monitoring a Scheduler Hierarchy on an Interface with QoS Profiles

Configuring an Integrated Scheduler to Provide QoS for ATM

ATM Integrated Scheduler Overview

Backpressure and the Integrated Scheduler

VP Shaping

Integrating the HRR Scheduler and SAR Scheduler

Per-Packet Queuing on the SAR Scheduler Overview

Operational QoS Shaping Mode for ATM Interfaces Overview

ERX-7xx Models, ERX-14xx Models, and the ERX-310 Router

E120 Router and E320 Router

Guidelines for Configuring QoS over ATM

Configuring Default Integrated Mode for ATM Interfaces

Configuring Low-Latency Mode for Per-Port Queuing on ATM Interfaces

Configuring Low-CDV Mode for Per-Port Queuing on ATM Interfaces

Configuring the QoS Shaping Mode for ATM Interfaces

Disabling Per-Port Queuing on ATM Interfaces

Monitoring QoS Configurations for ATM

Configuring QoS for Gigabit Ethernet Interfaces and VLAN Subinterfaces

Providing QoS for Ethernet Overview

QoS Shaping Mode for Ethernet Interfaces Overview

Configuring the QoS Shaping Mode for Ethernet Interfaces

Creating a QoS Interface Hierarchy for Bulk-Configured VLAN Subinterfaces with RADIUS

Monitoring QoS Configurations for Ethernet

Configuring QoS for 802.3ad Link Aggregation Groups

QoS for 802.3ad Link Aggregation Interfaces Overview

Types of Load Balancing

Munged QoS Profiles and Load Balancing

802.3ad Link Aggregation and QoS Parameters

QoS and Ethernet Link Redundancy

Active Link Failure and QoS

Administratively Disabling a Link and QoS

Adding a New Link to the LAG and QoS

Hashed Load Balancing for 802.3ad Link Aggregation Groups Overview

Sample Scheduler Hierarchy for Hashed Load Balancing

Subscriber Load Balancing for 802.3ad Link Aggregation Groups Overview

S-VLANs and Subscriber Load Balancing

PPPoE over VLANs and Subscriber Load Balancing

PPPoE over Ethernet (No VLANs) and Subscriber Load Balancing

MPLS over LAG and Subscriber Load Balancing

Sample Scheduler Hierarchy for Subscriber Load Balancing

Subscriber Allocation in 802.3ad Link Aggregation Groups

Guidelines for Configuring QoS over 802.3ad Link Aggregation Groups

Configuring the Scheduler Hierarchy for Hashed Load Balancing in 802.3ad Link Aggregation Groups

Enabling Default Subscriber Load Balancing for 802.3ad Link Aggregation Groups

Configuring the Scheduler Hierarchy for Subscriber Load Balancing in 802.3ad Link Aggregation Groups

Configuring Load Rebalancing for 802.3ad Link Aggregation Groups

Configuring Load–Rebalancing Parameters

Configuring the System to Dynamically Rebalance the LAG

Monitoring QoS Configurations for 802.3ad Link Aggregation Groups

Configuring QoS for L2TP Sessions

Providing QoS for L2TP Overview

Sample Scheduler Hierarchies for L2TP

Configuring QoS for an L2TP Session

Configuring QoS for an L2TP LNS Session

Configuring QoS for an L2TP LAC Session

Configuring QoS for Tunnel-Server Ports for L2TP LNS Sessions

QoS and L2TP TX Speed AVP 24 Overview

Logical Interfaces and Shared-Shaping Rates

Shaping Mode

Monitoring QoS Configurations for L2TP

QoS Parameter Overview

QoS Parameter Overview

QoS Parameter Audience

QoS Parameter Terms

Relationship Among QoS Parameters, Scheduler Profiles, and QoS Profiles

QoS Administrator Tasks

QoS Client Tasks

Configuring a QoS Parameter

Parameter Definition Attributes for QoS Administrators Overview

Naming Guidelines for QoS Parameters

Interface Types and QoS Parameters

Controlled-Interface Types

Instance-Interface Types

Subscriber-Interface Types

Range of QoS Parameters

Applications and QoS Parameters

Scheduler Profiles and Parameter Expressions for QoS Administrators

Referencing a Parameter Definition in a Scheduler Profile

Removing or Modifying a Scheduler Profile

Using Expressions for QoS Parameters

Operators and Precedence

Specifying a Range in Expressions

Configuring a Basic Parameter Definition for QoS Administrators

Parameter Instances for QoS Clients Overview

Global QoS Parameter Instance Overview

QoS Parameters for Interfaces Overview

Creating Parameter Instances

Creating a Global Parameter Instance

Creating a Parameter Instance for an Interface

Creating a Parameter Instance for an ATM VP

Creating a Parameter Instance for an S-VLAN

Example: QoS Parameter Configuration for Controlling Subscriber Bandwidth

Procedure for QoS Administrators

Procedure for QoS Clients

Monitoring the Subscriber Configuration

Complete Configuration Example

Configuring Hierarchical QoS Parameters

Hierarchical QoS Parameters Overview

Guidelines for Configuring Hierarchical Parameters

Configuring a Parameter Definition to Calculate Hierarchical Instances

Example: QoS Parameter Configuration for Hierarchical Parameters

Procedure for QoS Administrators

Procedure for QoS Clients

Monitoring Hierarchical QoS Parameters

Complete Configuration Example

Configuring IP Multicast Bandwidth Adjustment with QoS Parameters

IP Multicast Bandwidth Adjustment for QoS Overview

Guidelines for Configuring IP Multicast Adjustment for QoS

Configuring a Parameter Definition for IP Multicast Bandwidth Adjustment

Example: QoS Parameter Configuration for IP Multicast Bandwidth Adjustment

Monitoring the Configuration

Complete Configuration Example

Configuring the Shaping Mode for Ethernet with QoS Parameters

Cell Shaping Mode Using QoS Parameters Overview

Overriding the QoS Shaping Mode

Module Types and Capabilities for QoS Cell Mode Application

Cell Tax Adjustment Using QoS Cell Mode

Relationship with QoS Downstream Rate Application

Guidelines for Configuring the Cell Shaping Mode with QoS Parameters

Configuring a Parameter Definition to Shape Ethernet Traffic Using Cell Mode

Example: QoS Parameter Configuration for QoS Cell Mode and Byte Adjustment for Cell Shaping

Complete Configuration Example

Configuring Byte Adjustment for Shapng Rates with QoS Parameters

Byte Adjustment for ADSL and VDSL Traffic Overview

Byte Adjustment for Cell Shaping of ADSL Traffic Overview

Calculation and Example of Byte Adjustment for Cell Shaping

Byte Adjustment for Frame Shaping of VDSL Traffic Overview

System Calculation for Byte Adjustment of ADSL and VDSL Traffic

Guidelines for Configuring Byte Adjustment of Cell and Frame Shaping Rates Using QoS Parameters

Configuring a Parameter Definition to Adjust Cell Shaping Rates for ADSL Traffic

Configuring a Parameter Definition to Adjust Frame Shaping Rates for VDSL Traffic

Configuring the Downstream Rate Using QoS Parameters

QoS Downstream Rate Application Overview

Downstream Rate and the Shaping Mode

QoS Adaptive Mode and Downstream Rate

Obtaining Downstream Rates from a DSL Forum VSA

Guidelines for Configuring QoS Downstream Rate

Configuring a Parameter Definition for QoS Downstream Rate

Example: QoS Parameter Configuration for QoS Downstream Rate

Complete Configuration Example

Monitoring QoS Parameters

Monitoring QoS Parameters

Monitoring QoS on E-series Routers

Monitoring Service Levels with Traffic Classes

Monitoring Service Levels with Traffic-Class Groups

Monitoring Queue Thresholds

Monitoring Queue Profiles

Monitoring Drop Profiles for RED and WRED

Monitoring the QoS Scheduler Hierarchy

Monitoring the Configuration of Scheduler Profiles

Monitoring Shared Shapers

Monitoring Shared Shaper Algorithm Variables

Monitoring Forwarding and Drop Events on the Egress Queue

Monitoring Forwarding and Drop Rates on the Egress Queue

Monitoring Queue Statistics for the Fabric

Monitoring the Configuration of Statistics Profiles

Monitoring the QoS Profiles Attached to an Interface

Monitoring the Configuration of QoS Port-Type Profiles

Monitoring the Configuration of QoS Profiles

Monitoring the QoS Configuration of ATM Interfaces

Monitoring the QoS Configuration of IP Interfaces

Monitoring the QoS Configuration of Fast Ethernet, Gigabit Ethernet, and 10-Gigabit Ethernet Interfaces

Monitoring the QoS Configuration of IEEE 802.3ad Link Aggregation Group Bundles

Monitoring the AAA Downstream Rate for QoS

Monitoring QoS Parameter Instances

Monitoring QoS Parameter Definitions

Troubleshooting QoS

Troubleshooting Memory and Processor Use for Egress Queue Rate Statistics and Events

Index