Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - SERVICE AVAILABILITY CONFIGURATION GUIDE... Bedienungsanleitung

JunosE™ Software for

E Series™ Broadband

Services Routers

Service Availability Configuration Guide

Release

11.3.x

Published: 2010-10-08

Juniper Networks, Inc.

1194 North Mathilda Avenue

Sunnyvale, California 94089

USA

408-745-2000

www.juniper.net

Juniper Networks, Junos, Steel-Belted Radius, NetScreen, and ScreenOS are registered trademarks of Juniper Networks, Inc. in the United

States and other countries. The Juniper Networks Logo, the Junos logo, and JunosE are trademarks of Juniper Networks, Inc. All other

trademarks, service marks, registered trademarks, or registered service marks are the property of their respective owners.

Juniper Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the right to change, modify,

transfer, or otherwise revise this publication without notice.

Products made or sold by Juniper Networks or components thereof might be covered by one or more of the following patents that are

owned by or licensed to Juniper Networks: U.S. Patent Nos. 5,473,599, 5,905,725, 5,909,440, 6,192,051, 6,333,650, 6,359,479, 6,406,312,

6,429,706, 6,459,579, 6,493,347, 6,538,518, 6,538,899, 6,552,918, 6,567,902, 6,578,186, and 6,590,785.

JunosE™ Software for E Series™ Broadband Services Routers Service Availability Configuration Guide

Release 11.3.x

Writing: Krupa Chandrashekar, Sairam Venugopalan

Editing: Benjamin Mann

Illustration: Nathaniel Woodward

Cover Design: Edmonds Design

Revision History

October 2010—FRS JunosE 11.3.x

The information in this document is current as of the date listed in the revision history.

YEAR 2000 NOTICE

Juniper Networks hardware and software products are Year 2000 compliant. The Junos OS has no known time-related limitations through

the year 2038. However, the NTP application is known to have some difficulty in the year 2036.

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même que tous les documents y compris tout avis qui s'y rattaché, soient redigés en langue anglaise. (Translation: The parties confirm that

this Agreement and all related documentation is and will be in the English language)).

Abbreviated Table of Contents

AbouttheDocumentation.........................................xix

Part 1 Chapters

Chapter1 Service Availability .................................................3

Chapter2 ManagingModuleRedundancy......................................9

Chapter 3 Managing Stateful SRP Switchover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Chapter 4 Managing Stateful Line Module Switchover . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Chapter 5 Configuring a Unified In-Service Software Upgrade . . . . . . . . . . . . . . . . . . . 101

Chapter6 ConfiguringVRRP................................................149

Chapter 7 Managing Interchassis Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Part 2 Index

Index ...........................................................189

JunosE 11.3.x Service Availability Configuration Guide

Table of Contents

AbouttheDocumentation.........................................xix

E Series and JunosE Documentation and Release Notes . . . . . . . . . . . . . . . . . . . . xix

Audience..........................................................xix

E Series and JunosE Text and Syntax Conventions . . . . . . . . . . . . . . . . . . . . . . . . xix

ObtainingDocumentation............................................xxi

DocumentationFeedback............................................xxi

RequestingTechnicalSupport........................................xxi

Self-Help Online Tools and Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii

OpeningaCasewithJTAC........................................xxii

Part 1 Chapters

Chapter1 Service Availability .................................................3

ServiceAvailabilityOverview...........................................3

Service Availability Versus High Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Understanding Service Availability Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

ModuleRedundancy..............................................5

StatefulSRPSwitchover..........................................5

StatefulLineModuleSwitchover....................................5

UnifiedISSU ....................................................6

VRRP..........................................................6

InterchassisRedundancy..........................................6

Chapter2 ManagingModuleRedundancy......................................9

LineModuleRedundancyOverview.....................................9

Line Module Redundancy Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

ERX7xxModelsandERX14xxModels................................10

E120andE320Routers...........................................10

IOA Behavior When the Router Reboots . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Line Module Behavior When Disabling or Enabling IOAs . . . . . . . . . . . . . . 11

UnderstandingAutomaticSwitchover...................................12

Limitations of Automatic Switchover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Understanding Reversion After Switchover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

ConfiguringLineModuleRedundancy...................................13

ManagingLineModuleRedundancy....................................13

Example: Forcing the Router to Switch from Primary Line Module to Spare Line

Module ........................................................14

Interoperation of Redundancy and Stateful Switchover for Line Modules . . . . . . . 15

Understanding SRP Module Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Understanding Configuration of SRP Modules for Redundancy . . . . . . . . . . . . . . . 19

InstallingaRedundantSRPModule....................................20

ManagingSRPModuleRedundancy....................................21

Switching to the Redundant SRP Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Determination of Redundancy Status for Line Modules and SRP Modules Using

StatusLEDs....................................................22

Monitoring Redundancy in Installed Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Monitoring Redundancy in Line Module and SRP Modules . . . . . . . . . . . . . . . . . . 27

Monitoring Redundancy Status on E320 Router . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Chapter 3 Managing Stateful SRP Switchover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

StatefulSRPSwitchoverOverview.....................................35

Stateful SRP Switchover Platform Considerations . . . . . . . . . . . . . . . . . . . . . . . . 36

Module Requirements ...........................................36

Stateful SRP Switchover Redundancy Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

FileSystemSynchronizationMode..................................37

HighAvailabilityMode............................................37

StatefulSRPSwitchoverStates.......................................38

DisabledState..................................................39

Initializing State ................................................40

ActiveState....................................................40

Pending State ..................................................41

Application Support for Stateful SRP Switchover . . . . . . . . . . . . . . . . . . . . . . . . . 42

ApplicationSupport.............................................42

Guidelines for Activating High Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

ActivatingHighAvailability............................................52

Guidelines for Deactivating High Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

DeactivatingHighAvailability.........................................53

Guidelines for Setting the IP Interface Priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

SettingtheIPInterfacePriority........................................54

GuidelinesforUpgradingSoftware.....................................55

MonitoringtheRedundancyStatus.....................................56

Monitoring the Redundancy Status of Applications . . . . . . . . . . . . . . . . . . . . . . . . 59

MonitoringtheRedundancyHistory.....................................61

Monitoring the Redundancy Status of Line Modules . . . . . . . . . . . . . . . . . . . . . . . 62

Monitoring the Redundancy Status of SRP Modules . . . . . . . . . . . . . . . . . . . . . . . 63

Monitoring the Redundancy Switchover History . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

ClearingtheRedundancyHistory......................................65

Chapter 4 Managing Stateful Line Module Switchover . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Stateful Line Module Switchover Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Benefits of Stateful Line Module Switchover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

1:1RedundancyModel...........................................69

Seamless Preservation of Subscriber Sessions . . . . . . . . . . . . . . . . . . . . . . . . 69

Stateful Line Module Switchover Platform Considerations . . . . . . . . . . . . . . . . . . 70

Guidelines for Configuring Stateful Line Module Switchover . . . . . . . . . . . . . . . . . 70

System Operations When Stateful Line Module Switchover Is Enabled . . . . . . . . 74

Stateful Line Module Configuration Scenarios . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

High Availability Configured and Enabled on the Line Module . . . . . . . . . . . . 75

High Availability Configured and Disabled on the Line Module . . . . . . . . . . . . 76

High Availability Configured and the Switchover State Is Active or

Disabled ...................................................76

JunosE 11.3.x Service Availability Configuration Guide

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