Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware
Guide

Modified: 2015-11-18

Copyright © 2015, Juniper Networks, Inc.

Juniper Networks, Inc.
1133 Innovation Way
Sunnyvale, California 94089
USA
408-745-2000
www.juniper.net

Copyright © 2015, Juniper Networks, Inc. All rights reserved.

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.

MX2020 3D Universal Edge Router Hardware Guide

Copyright © 2015, Juniper Networks, Inc.
All rights reserved.

The information in this document is current as of the date on the title page.

YEAR 2000 NOTICE

Juniper Networks hardware and software products are Year 2000 compliant. 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.

END USER LICENSE AGREEMENT

The Juniper Networks product that is the subject of this technical documentation consists of (or is intended for use with) Juniper Networks
software. Use of such software is subject to the terms and conditions of the End User License Agreement (“EULA”) posted at

http://www.juniper.net/support/eula.html. By downloading, installing or using such software, you agree to the terms and conditions of

that EULA.

Copyright © 2015, Juniper Networks, Inc.ii

Table of Contents

About the Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxvii

Documentation and Release Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxvii

Supported Platforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxvii

Documentation Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxvii

Documentation Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxix

Requesting Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxx

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

Opening a Case with JTAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxx

Part 1 Overview

Chapter 1 MX2020 Router Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

MX2020 Router Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Chapter 2 System Overview and Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

MX2020 Chassis Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

MX2020 Backplane Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

MX2020 Component Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

MX2020 Field-Replaceable Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

MX2020 Router Hardware Components and CLI Terminology . . . . . . . . . . . . . . . . 17

Chapter 3 Chassis Components and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

MX2020 Chassis Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

MX2020 Backplane Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

MX2020 Component Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

MX2020 Field-Replaceable Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

MX2020 Router Hardware Components and CLI Terminology . . . . . . . . . . . . . . . 33

Chapter 4 Alarm and Display Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

MX2020 Craft Interface Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

MX2020 Component LEDs on the Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . 39

MX2020 Host Subsystem LEDs and Buttons on the Craft Interface . . . . . . . 39

MX2020 Power Supply Module LEDs on the Craft Interface . . . . . . . . . . . . . 40

MX2020 Line Card LEDs and Buttons on the Craft Interface . . . . . . . . . . . . . 40

MX2020 SFB LED and Buttons on the Craft Interface . . . . . . . . . . . . . . . . . . 40

MX2020 Fan Tray LEDs on the Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . 41

MX2020 Alarm Relay Contacts on the Craft Interface . . . . . . . . . . . . . . . . . . . . . . 41

MX2020 Alarm LEDs and Alarm Cutoff/Lamp Test Button . . . . . . . . . . . . . . . . . . 42

iiiCopyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Chapter 5 Cable and Rack Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

MX2020 Cable Manager Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Standard Cable Management System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Extended Cable Management System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

MX2020 Rack-Mounting Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Chapter 6 Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

MX2020 Cooling System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

MX2020 Fan Tray LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Chapter 7 Host Subsystem Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

MX2020 Host Subsystem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Supported CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

CB-RE Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

CB-RE Slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

CB-RE Interface Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

MX2020 CB-RE Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

RE-MX2000-1800x4 CB-RE Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

RE-MX2000-1800x4 CB-RE Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

RE-MX2000-1800x4 CB-RE Boot Sequence . . . . . . . . . . . . . . . . . . . . . . . . . 62

MX2020 CB-RE LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

MX2020 Switch Fabric Board Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

SFB Slots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

SFB Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

SFB Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

MX2020 Switch Fabric Board LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Chapter 8 Interface Modules—ADCs, MPCs, and MICs . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

MX2020 Adapter Card (ADC) Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

MX2020 Modular Port Concentrator Description . . . . . . . . . . . . . . . . . . . . . . . . . . 68

MPC Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

MX2020 Modular Port Concentrator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

MPCs Supported by MX240, MX480, MX960, MX2010, and MX2020

Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

MX2020 MPC Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

MX2020 Modular Interface Card Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

MICs Supported by MX Series Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

MX2020 Modular Interface Card LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

MX2020 Port and Interface Numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Chapter 9 Power Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

MX2020 Power Subsystem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

MX2020 Power Midplane Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

MX2020 Three-Phase Delta AC Power Distribution Module Description . . . . . . . 86

MX2020 Three-Phase Wye AC Power Distribution Module Description . . . . . . . . 88

MX2010 Seven-Feed Single Phase AC Power Distribution Module

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

MX2010 DC Power Distribution Module Description . . . . . . . . . . . . . . . . . . . . . . . 90

MX2020 Three-Phase Delta and Wye AC Power Distribution Module LEDs . . . . . 91

Copyright © 2015, Juniper Networks, Inc.iv

Table of Contents

MX2020 Nine-Feed Single Phase AC Power Distribution Module Description . . . 92

MX2020 AC Power Supply Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

MX2020 DC Power Distribution Module Description . . . . . . . . . . . . . . . . . . . . . . . 94

MX2020 DC Power Distribution Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

MX2020 DC Power Supply Module Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

MX2020 DC Power Supply Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Part 2 Site Planning, Preparation, and Specifications

Chapter 10 Planning and Preparing the Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Overview of Preparing the Site for the MX2020 Router . . . . . . . . . . . . . . . . . . . . 103

MX2020 Cabinet Airflow Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

MX2020 Cabinet Size and Clearance Requirements . . . . . . . . . . . . . . . . . . . . . . 106

MX2020 Chassis Moving Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

MX2020 Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

MX2020 Rack Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Rack Size and Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Spacing of Mounting Bracket Holes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Connection to the Building Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

MX2020 Moving Requirements and Guidelines Using a Router Transport Kit . . . 113

Router Transport Kit Turning Radius . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Router Transport Kit Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

MX2020 Router Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

MX2020 Router Grounding Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

MX2020 Chassis Grounding Points Specifications . . . . . . . . . . . . . . . . . . . . . 117

MX2020 Router Grounding Cable Lug Specifications . . . . . . . . . . . . . . . . . . 118

MX2020 Router Grounding Cable Specifications . . . . . . . . . . . . . . . . . . . . . . 119

MX2020 Site Preparation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Clearance Requirements forAirflow andHardwareMaintenance for the MX2020

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Rack-Mounting Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Chapter 11 Transceiver and Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Understanding Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion . . . . 127

Signal Loss in Multimode and Single-Mode Fiber-Optic Cable . . . . . . . . . . . 127

Attenuation and Dispersion in Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . . . . 128

Calculating Power Budget and Power Margin for Fiber-Optic Cables . . . . . . . . . 128

Calculating Power Budget for Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . . . . 129

Calculating Power Margin for Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . . . . 129

CB-RE Interface Cable and Wire Specifications for MX Series Routers . . . . . . . . 130

Installing an MX2020 Three-Phase Wye AC Power Cord . . . . . . . . . . . . . . . . . . . 131

NetworkCable and Transceiver Overview for ACXSeries, M Series, and MX Series

Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

Supported Network Interface Standards by Transceiver for ACX, M, MX, and T

Series Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Chapter 12 Pinout Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

RJ-45 Connector Pinouts for MX Series CB-RE Auxiliary and Console Ports . . . . 145

RJ-45 Connector Pinouts for an MX Series CB-RE Management Port . . . . . . . . . 146

vCopyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Chapter 13 AC Power Requirements, Specifications, and Guidelines . . . . . . . . . . . . . . 147

MX2020 AC Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

MX2020 AC Power Cord Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

MX2020 AC Power Subsystem Electrical Specifications . . . . . . . . . . . . . . . . . . . 158

MX2020 AC Power Supply Module Description . . . . . . . . . . . . . . . . . . . . . . . . . . 158

MX2020 Router Grounding Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

MX2020 Chassis Grounding Points Specifications . . . . . . . . . . . . . . . . . . . . . 161

MX2020 Router Grounding Cable Lug Specifications . . . . . . . . . . . . . . . . . . 161

MX2020 Router Grounding Cable Specifications . . . . . . . . . . . . . . . . . . . . . 162

MX2020 Three-Phase Delta AC Power Distribution Module Specifications . . . . 163

MX2020 Three-Phase Wye AC Power Distribution Module Specifications . . . . . 163

MX2020 Seven-Feed AC Power Distribution Module Specifications . . . . . . . . . . 164

MX2010 Nine-Feed AC Power Distribution Module Specifications . . . . . . . . . . . 164

Calculating AC Power Requirements for MX2020 Routers . . . . . . . . . . . . . . . . . . 165

Mapping Input Power from AC Power Distribution Modules to AC Power Supply

Modules on the MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Chapter 14 DC Power Requirements, Specifications, and Guidelines . . . . . . . . . . . . . . . 171

MX2020 DC Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

MX2020 DC Power Distribution Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

MX2020 DC Power Subsystem Electrical Specifications . . . . . . . . . . . . . . . . . . . 179

Calculating DC Power Requirements for MX2020 Routers . . . . . . . . . . . . . . . . . 180

DC Power Circuit Breaker Requirements for the MX2020 Router . . . . . . . . . . . . . 184

DC Power Cable Specifications for the MX2020 Router . . . . . . . . . . . . . . . . . . . . 184

Part 3 Initial Installation and Configuration

Chapter 15 Installation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Installing an MX2020 Router Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

Tools and Parts Required to Unpack the MX2020 Router . . . . . . . . . . . . . . . . . . 190

Tools Required to Install the MX2020 Router Using a Pallet Jack . . . . . . . . . . . . . 191

Tools Required to Install the MX2020 Router Using a Router Transport Kit . . . . . 191

Tools and Parts Required for Connecting the MX2020 Router to Power . . . . . . . 192

Tools and Parts Required to Maintain the MX2020 Hardware Components . . . . 193

Tools and Parts Required for MX2020 Router Connections . . . . . . . . . . . . . . . . . 193

Chapter 16 Unpacking the Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Overview of Unpacking the MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Unpacking the MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Verifying the MX2020 Parts Received . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

Unpacking the Router Transport Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

Chapter 17 Installing the Mounting Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Installing the MX2020 Mounting Hardware for a Four-Post Rack or Cabinet . . . 205

Installing Cage Nuts, If Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Installing the Four-Post Mounting Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Copyright © 2015, Juniper Networks, Inc.vi

Table of Contents

Chapter 18 Installing the Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Removing Components from the MX2020 Router Chassis Before Installing It In

a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Removing the Power Distribution Modules Before Installing an MX2020

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210

Removing the Power Supply Modules Before Installing an MX2020

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Removing the Fan Trays Before Installing an MX2020 Router . . . . . . . . . . . . 213

Removing the SFBs Before Installing an MX2020 Router . . . . . . . . . . . . . . . 214

Removing the MPCs with Adapter Card Before Installing an MX2020

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

Removing the MPCs without an Adapter Card Before Installing an MX2020

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

Removing the CB-REs Before Installing the MX2020 Router . . . . . . . . . . . . . 217

Installing a MX2020 Router Using a Pallet Jack Overview . . . . . . . . . . . . . . . . . . 219

Installing the Pallet Jack Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

Installing the MX2020 Router Using a Pallet Jack with Attachment . . . . . . . . . . 220

Installing a MX2020 Router Using a Router Transport Kit Overview . . . . . . . . . . 224

Installing the Router Transport Kit on the MX2020 Router . . . . . . . . . . . . . . . . . 224

Securing the MX2020 Router to the Router Transport Platform . . . . . . . . . . . . . 226

Installing the MX2020 Router Using a Router Transport Kit . . . . . . . . . . . . . . . . 229

Reinstalling Components in the MX2020 Chassis After Installing It In a Rack . . 236

Reinstalling the Power Distribution Modules After Installing the MX2020 In

a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

Reinstalling the Power Supply Modules After Installing the MX2020 In a

Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

Reinstalling the Fan Trays After Installing the MX2020 In a Rack . . . . . . . . 240

Reinstalling the SFBs After Installing the MX2020 In a Rack . . . . . . . . . . . . 241

Reinstalling the Adapter Card After Installing the MX2020 In a Rack . . . . . 242

Reinstalling the MPCs After Installing the MX2020 In a Rack . . . . . . . . . . . 243

Reinstalling the CB-REs After Installing the MX2020 In a Rack . . . . . . . . . . 244

Chapter 19 Connecting the Router to Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

Grounding the MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

Connecting AC Power to an MX2020 Router with Three-Phase Delta AC Power

Distribution Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

Connecting AC Power to an MX2020 Router with Three-Phase Wye AC Power

Distribution Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252

Mapping Input Power from AC Power Distribution Modules to AC Power Supply

Modules on the MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256

Installing MX2020 AC Power Supply Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . 258

Powering On the AC-Powered MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . 260

Connecting Power to a DC-Powered MX2020 Router with Power Distribution

Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262

Installing MX2020 DC Power Supply Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

Connecting an MX2020 DC Power Distribution Module Cable . . . . . . . . . . . . . . 268

Connect Power to a Single-Phase Seven-Feed AC Power Distribution

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270

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Connect Power to a Single-Phase Seven-Feed AC Power Distribution

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270

Connect Power to a Seven-Feed DC Power Distribution Module . . . . . . . . . . . . . 271

Powering On the DC-Powered MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . 273

Chapter 20 Connecting the Router to the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

Connecting the MX2020 Router to Management and Alarm Devices . . . . . . . . . 275

Connecting the MX2020 Router to a Network for Out-of-Band

Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

Connecting the MX2020 Router to a Console or Auxiliary Device . . . . . . . . 276

Connecting an MX2020 Router to an External Alarm-Reporting Device . . . 277

Connecting the MX2020 Router to a Network for Out-of-Band Management . . 278

Connecting the MX2020 Router to a Console or Auxiliary Device . . . . . . . . . . . . 279

Connecting an MX2020 Router to an External Alarm-Reporting Device . . . . . . 280

Connecting the Alarm Relay Wires to the MX2020 Craft Interface . . . . . . . . . . . 282

Disconnecting the Alarm Relay Wires from the MX2020 Craft Interface . . . . . . 283

Connecting MPC or MIC Cables to the MX2020 Router . . . . . . . . . . . . . . . . . . . . 284

Chapter 21 Initially Configuring the Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

Initially Configuring the MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

Chapter 22 Installing and Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293

Installing an MX2020 AC Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . 293

Installing an MX2020 Adapter Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295

Installing the MX2020 Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296

Installing the MX2020 Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

Installing an MX2020 Extended Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . 300

Installing an MX2020 CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301

Installing the MX2020 DC Cable Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

Installing an MX2020 DC Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . 305

Installing an MX2020 Dual-Wide MIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306

Installing the MX2020 Standard EMI Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308

Installing the MX2020 Extended EMI Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309

Installing an MX2020 Fan Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312

Installing the MX2020 Air Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

Installing the MX2020 Lower Cable Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

Installing an MX2020 MIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315

Installing an MX2020 SFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318

Installing an MX2020 Three-Phase Delta AC Power Distribution Module . . . . . . 323

Installing an MX2020 Three-Phase Wye AC Power Distribution Module . . . . . . 328

Installing the MX2020 Upper Cable Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332

Installing an SFP or XFP Transceiver into an MX2020 MPC or MIC . . . . . . . . . . . 333

Part 4 Maintaining the Chassis and Components

Chapter 23 Maintaining Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

Maintaining the MX2020 Adapter Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338

Maintaining Cables That Connect to MX2020 MPCs or MICs . . . . . . . . . . . . . . . 338

Maintaining and Verifying the Status of the MX2020 Router Components . . . . 340

Maintaining the MX2020 Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341

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Maintaining the MX2020 Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341

Maintaining the MX2020 Chassis FRU Power On Sequence . . . . . . . . . . . . . . . . 342

Maintaining the MX2020 Control Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342

Maintaining the MX2020 Cooling System Components . . . . . . . . . . . . . . . . . . . 343

Maintaining the MX2020 Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344

Maintaining the MX2020 Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344

Maintaining the MX2020 Air Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344

Maintaining the MX2020 Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345

Maintaining the MX2020 Cooling System Zones . . . . . . . . . . . . . . . . . . . . . 355

Maintaining the MX2020 Cooling System Zones . . . . . . . . . . . . . . . . . . . . . . . . . 356

Maintaining the MX2020 Ethernet Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357

Maintaining the MX2020 Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359

Maintaining the MX2020 Air Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370

Maintaining the MX2020 Host Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370

Maintaining the MX2020 Routing Engines . . . . . . . . . . . . . . . . . . . . . . . . . . 370

Maintaining the MX2020 Control Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373

Maintaining MX2020 MICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374

Maintaining MX2020 MPCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 375

Maintaining MX2020 Packet Forwarding Engine Components . . . . . . . . . . . . . . 378

Maintaining MX2020 MPCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378

Maintaining MX2020 MICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 382

Maintaining the MX2020 Ethernet Switch . . . . . . . . . . . . . . . . . . . . . . . . . . 383

Maintaining Cables That Connect to MX2020 MPCs or MICs . . . . . . . . . . . . 385

Maintaining the MX2020 Power Supply Modules . . . . . . . . . . . . . . . . . . . . . . . . 386

Maintaining the MX2020 Power Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 391

Maintaining the MX2020 Routing Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395

Maintaining the MX2020 SFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 397

Maintaining the MX2020 Switch Processor Mezzanine Board . . . . . . . . . . . . . . 398

Maintaining and Verifying the MX2020 Router Version . . . . . . . . . . . . . . . . . . . . 398

Maintaining and Verifying the Status of the MX2020 Craft Interface . . . . . . . . . 399

Taking an MX2020 Host Subsystem Offline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 401

Effect of Taking the MX2020 Host Subsystem Offline . . . . . . . . . . . . . . . . . . . . 402

Holding an MX2020 MPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404

Storing an MX2020 MPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406

Routine Maintenance Procedures for the MX2020 Router . . . . . . . . . . . . . . . . . 407

Chapter 24 Packing and Returning Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409

Guidelines for Packing Router Components for Shipment . . . . . . . . . . . . . . . . . 409

Packing the MX2020 Router for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409

Returning a Hardware Component to Juniper Networks, Inc. . . . . . . . . . . . . . . . . 412

Chapter 25 Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415

Tools and Parts Required for Replacing MX2020 Hardware Components . . . . . 416

Tools and Parts Required to Remove Components from an MX2020 Router . . . 418

Replacing an MX2020 CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 418

Removing an MX2020 CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 419

Installing an MX2020 CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 420

Replacing the Alarm Relay Wires from the MX2020 Craft Interface . . . . . . . . . . 422

Disconnecting the Alarm Relay Wires from the MX2020 Craft Interface . . . 422

Connecting the Alarm Relay Wires to the MX2020 Craft Interface . . . . . . . 423

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Replacing a Cable on an MX2020 MPC or MIC . . . . . . . . . . . . . . . . . . . . . . . . . . . 424

Removing a Cable on an MX2020 MPC or MIC . . . . . . . . . . . . . . . . . . . . . . . 424

Installing a Cable on an MX2020 MPC or MIC . . . . . . . . . . . . . . . . . . . . . . . . 425

Replacing an MX2020 AC Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . 428

Removing an MX2020 AC Power Supply Module . . . . . . . . . . . . . . . . . . . . . 428

Installing an MX2020 AC Power Supply Module . . . . . . . . . . . . . . . . . . . . . . 429

Replacing the MX2020 Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 431

Removing the MX2020 Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 431

Installing the MX2020 Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434

Replacing the MX2020 Cable Managers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 437

Removing the MX2020 Upper Cable Manager . . . . . . . . . . . . . . . . . . . . . . . 438

Removing the MX2020 Lower Cable Manager . . . . . . . . . . . . . . . . . . . . . . . 438

Removing the MX2020 DC Cable Manager . . . . . . . . . . . . . . . . . . . . . . . . . . 439

Installing the MX2020 Lower Cable Manager . . . . . . . . . . . . . . . . . . . . . . . . 440

Installing the MX2020 Upper Cable Manager . . . . . . . . . . . . . . . . . . . . . . . . 441

Installing the MX2020 DC Cable Manager . . . . . . . . . . . . . . . . . . . . . . . . . . 442

Replacing the MX2020 Extended Cable Managers . . . . . . . . . . . . . . . . . . . . . . . 443

Removing the MX2020 Upper Extended Cable Manager . . . . . . . . . . . . . . . 443

Removing the MX2020 Lower Extended Cable Manager . . . . . . . . . . . . . . . 444

Removing the MX2020 Extended DC Cable Manager . . . . . . . . . . . . . . . . . 445

Installing the MX2020 Upper Extended Cable Manager . . . . . . . . . . . . . . . 446

Installing the Lower MX2020 Extended Cable Manager . . . . . . . . . . . . . . . . 447

Installing the MX2020 Extended DC Cable Manager . . . . . . . . . . . . . . . . . . 448

Removing an MX2020 CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 449

Replacing the MX2020 Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450

Removing the MX2020 Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 451

Installing the MX2020 Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 451

Replacing an MX2020 Extended Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . 452

Removing an MX2020 Extended Craft Interface . . . . . . . . . . . . . . . . . . . . . . 452

Installing an MX2020 Extended Craft Interface . . . . . . . . . . . . . . . . . . . . . . 453

Replacing an MX2020 DC Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . 454

Removing an MX2020 DC Power Supply Module . . . . . . . . . . . . . . . . . . . . . 454

Installing an MX2020 DC Power Supply Module . . . . . . . . . . . . . . . . . . . . . 456

Replacing an MX2020 DC Power Distribution Module . . . . . . . . . . . . . . . . . . . . . 457

Removing an MX2020 DC Power Distribution Module . . . . . . . . . . . . . . . . . 457

Installing an MX2020 DC Power Distribution Module . . . . . . . . . . . . . . . . . . 459

Replacing an MX2020 DC Power Distribution Module Cable . . . . . . . . . . . . . . . 462

Disconnecting an MX2020 DC Power Distribution Module Cable . . . . . . . . 463

Connecting an MX2020 DC Power Distribution Module Cable . . . . . . . . . . 463

Replacing the MX2020 Standard EMI Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . 465

Removing the MX2020 Standard EMI Covers . . . . . . . . . . . . . . . . . . . . . . . . 465

Installing the MX2020 Standard EMI Covers . . . . . . . . . . . . . . . . . . . . . . . . 466

Replacing the MX2020 Extended EMI Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 467

Removing the MX2020 Extended EMI Covers . . . . . . . . . . . . . . . . . . . . . . . . 467

Installing the MX2020 Extended EMI Cover . . . . . . . . . . . . . . . . . . . . . . . . . 469

Replacing an MX2020 Fan Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 471

Removing an MX2020 Fan Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 472

Installing an MX2020 Fan Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 473

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Replacing the MX2020 Air Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475

Removing the MX2020 Air Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475

Installing the MX2020 Air Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 476

Replacing an MX2020 MIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 477

Removing an MX2020 MIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 477

Installing an MX2020 MIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 479

Installing an MX2020 Dual-Wide MIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 481

Replacing a MIC Installed on an MPC6E . . . . . . . . . . . . . . . . . . . . . . . . . . . . 483

Removing a MIC from an MPC6E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 483

Installing a MIC on an MPC6E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 484

Replacing an MX2020 MPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485

Removing an MX2020 MPC with Adapter Card . . . . . . . . . . . . . . . . . . . . . . 485

Removing an MX2020 MPC from the Adapter Card . . . . . . . . . . . . . . . . . . . 487

Removing an MX2020 Adapter Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 489

Installing an MX2020 Adapter Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 491

Installing an MX2020 MPC into an Adapter Card . . . . . . . . . . . . . . . . . . . . . 492

Replacing an MX2020 SFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494

Removing an MX2020 SFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495

Installing an MX2020 SFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496

Replacing an SFP or XFP Transceiver on an MX2020 MPC or MIC . . . . . . . . . . . 502

Removing an SFP or XFP Transceiver from an MX2020 MPC or MIC . . . . . . 502

Installing an SFP or XFP Transceiver into an MX2020 MPC or MIC . . . . . . . 503

Replacing an MX2020 Three-Phase Delta AC Power Cord . . . . . . . . . . . . . . . . . 504

Removing an MX2020 Three-Phase Delta AC Power Cord . . . . . . . . . . . . . 504

Installing an MX2020 Three-Phase Delta AC Power Cord . . . . . . . . . . . . . . 507

Replacing an MX2020 Three-Phase Delta AC Power Distribution Module . . . . . 510

Removing an MX2020 Three-Phase Delta AC Power Distribution

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 510

Installing an MX2020 Three-Phase Delta AC Power Distribution Module . . 514

Replacing an MX2020 Three-Phase Wye AC Power Distribution Module . . . . . . 518

Removing an MX2020 Three-Phase Wye AC Power Distribution Module . . 518
Installing an MX2020 Three-Phase Wye AC Power Distribution Module . . . 522

Chapter 26 Powering Off the Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 527

Powering Off the AC-Powered MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . 527

Powering Off the DC-Powered MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . 528

Part 5 Troubleshooting Hardware

Chapter 27 Troubleshooting Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 531

MX2020 Troubleshooting Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 531

Command-Line Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 531

Chassis and Interface Alarm Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 532

Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 532

Craft Interface LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 532

Component LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 533

Troubleshooting the MX2020 Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . 534

Troubleshooting the MX2020 Host Subsystems . . . . . . . . . . . . . . . . . . . . . . . . . 536

Troubleshooting the MX2020 MICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 537

Troubleshooting the MX2020 MPCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 538

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Troubleshooting the MX2020 Power Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . 541

Chapter 28 Contacting Customer Support and Returning the Chassis or

Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 549

Contacting Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 549

Part 6 Safety and Compliance Information

Chapter 29 General Safety Guidelines and Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 553

Definition of Safety Warning Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 553

General Safety Guidelines for Juniper Networks Devices . . . . . . . . . . . . . . . . . . . 555

General Safety Warnings for Juniper Networks Devices . . . . . . . . . . . . . . . . . . . . 556

Qualified Personnel Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556

Restricted-Access Area Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556

Preventing Electrostatic Discharge Damage to an MX2020 Router . . . . . . . . . . 558

Chapter 30 Fire Safety Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 561

Fire Safety Requirements for Juniper Networks Devices . . . . . . . . . . . . . . . . . . . . 561

General Fire Safety Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 561

Fire Suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 561

Fire Suppression Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 561

Chapter 31 Installation Safety Guidelines and Warnings . . . . . . . . . . . . . . . . . . . . . . . . 563

Installation Safety Warnings for Juniper Networks Devices . . . . . . . . . . . . . . . . . 563

Intrabuilding Ports Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 563

Installation Instructions Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 563

Rack-Mounting Requirements and Warnings . . . . . . . . . . . . . . . . . . . . . . . . 564

Ramp Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 567

Chapter 32 Laser and LED Safety Guidelines and Warnings . . . . . . . . . . . . . . . . . . . . . . 569

General Laser Safety Guidelines for Juniper Networks Devices . . . . . . . . . . . . . . 569

Laser Safety Warnings for Juniper Networks Devices . . . . . . . . . . . . . . . . . . . . . . 569

Class 1 Laser Product Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 570

Class 1 LED Product Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 570

Laser Beam Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 570

Radiation from Open Port Apertures Warning . . . . . . . . . . . . . . . . . . . . . . . . 571

Chapter 33 Maintenance and Operational Safety Guidelines and Warnings . . . . . . . . 573

Maintenance and Operational Safety Warnings for Juniper Networks Devices . . 573

Battery Handling Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 573

Jewelry Removal Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 574

Lightning Activity Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 575

Operating Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 576

Product Disposal Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 577

Chapter 34 Electrical Safety Guidelines and Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . 579

General Electrical Safety Warnings for Juniper Networks Devices . . . . . . . . . . . . 579

Grounded Equipment Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 579

Grounding Requirements and Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 580

Midplane Energy Hazard Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 581

Multiple Power Supplies Disconnection Warning . . . . . . . . . . . . . . . . . . . . . . 581

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Power Disconnection Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 582

General Electrical Safety Guidelines and Electrical Codes for Juniper Networks

Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 583

TN Power Warning for MX2020 Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 583

MX2020 AC Power Electrical Safety Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . 584

MX2020 DC Power Electrical Safety Guidelines and Warnings . . . . . . . . . . . . . . 585

MX2020 DC Power Electrical Safety Guidelines . . . . . . . . . . . . . . . . . . . . . . 585

DC Power Electrical Safety Warnings for Juniper Networks Devices . . . . . . 586

DC Power Copper Conductors Warning . . . . . . . . . . . . . . . . . . . . . . . . . 586

DC Power Disconnection Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 587

DC Power Wiring Terminations Warning . . . . . . . . . . . . . . . . . . . . . . . . 588

DC Power Electrical Safety Warnings for Juniper Networks Devices . . . . . . . . . . 589

DC Power Copper Conductors Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 589

DC Power Disconnection Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 590

DC Power Wiring Terminations Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 591

Site Electrical Wiring Guidelines for MX Series Routers . . . . . . . . . . . . . . . . . . . . 592

Distance Limitations for Signaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 593

Radio Frequency Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 593

Electromagnetic Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 593

Chapter 35 Agency Approvals and Compliance Statements . . . . . . . . . . . . . . . . . . . . . 595

Agency Approvals and Compliance Statements for the MX2020 Router . . . . . . 595

Agency Approvals for MX2020 Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 595

Compliance Statements for NEBS for the MX2020 Router . . . . . . . . . . . . . 596

Compliance Statements for EMC Requirements for the MX2020 Router . . 596

Canada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 596

European Community . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 597

Israel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 597

Japan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 597

United States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 597

Compliance Statements for Environmental Requirements for Juniper

Networks Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 597

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List of Figures

Part 1 Overview

Chapter 2 System Overview and Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 1: Front View of a Fully Configured MX2020 Router Chassis . . . . . . . . . . . . . 6

Figure 2: Rear View of a Fully Configured AC-Powered MX2020 Router

Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 3: Rear View of a Fully Configured DC-Powered MX2020 Router

Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 4: MX2020 Router ESD Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 5: Power Distribution from Each Power Subsystem to the FRUs . . . . . . . . . 13

Figure 6: DC Power Subsystem Feed Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 7: Power Distribution from Three-Phase Feed Delta PDM to the AC

PSMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 8: Power Distribution from Three-Phase Feed Wye PDM to the AC

PSMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Chapter 3 Chassis Components and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 9: Front View of a Fully Configured MX2020 Router Chassis . . . . . . . . . . . 22

Figure 10: Rear View of a Fully Configured AC-Powered MX2020 Router

Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 11: Rear View of a Fully Configured DC-Powered MX2020 Router

Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 12: MX2020 Router ESD Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 13: Power Distribution from Each Power Subsystem to the FRUs . . . . . . . . 29

Figure 14: DC Power Subsystem Feed Redundancy . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 15: Power Distribution from Three-Phase Feed Delta PDM to the AC

PSMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 16: Power Distribution from Three-Phase Feed Wye PDM to the AC

PSMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Chapter 4 Alarm and Display Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 17: Front Panel of the Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 18: Extended Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 19: Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Chapter 5 Cable and Rack Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 20: MX2020 Standard Cable Managers . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 21: Upper and Lower Cable Management . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 22: Middle Card-Cage Cable Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 23: Middle Card-Cage Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 24: MX2020 Extended Cable Managers . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 25: Upper and Lower Extended Cable Management . . . . . . . . . . . . . . . . . . 50

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Chapter 6 Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 26: Removing Fan Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 27: Airflow Through the Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Figure 28: Upper/Lower Fan Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 29: Lower Fan Tray Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Chapter 7 Host Subsystem Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Figure 30: RE-MX2000-1800x4 CB-RE Front View . . . . . . . . . . . . . . . . . . . . . . . . 59

Figure 31: SFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Chapter 8 Interface Modules—ADCs, MPCs, and MICs . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 32: Typical ADC Supported on the MX2020 Router . . . . . . . . . . . . . . . . . . 68

Figure 33: Typical MPC Supported on the MX2020 Router . . . . . . . . . . . . . . . . . . 69

Figure 34: MPC Installed in the MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Figure 35: MPC Edges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Figure 36: MX2020 Interface Port Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Chapter 9 Power Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Figure 37: Three-Phase Delta AC Power Distribution Module . . . . . . . . . . . . . . . . 86

Figure 38: Three-Phase Delta AC Power Distribution Module Connections . . . . . 87

Figure 39: Three-Phase Delta AC Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Figure 40: Three-Phase Wye AC Power Distribution Module . . . . . . . . . . . . . . . . . 88

Figure 41: Three-Phase Wye AC Power Distribution Module Connections . . . . . . 89

Figure 42: Three-Phase Wye AC Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Figure 43: Seven Feed Single Phase AC Power Distribution Module . . . . . . . . . . . 90

Figure 44: DC Power Distribution Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Figure 45: Three-Phase Delta AC PDM LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 46: Single-Phase Nine-Feed AC Power Distribution Module . . . . . . . . . . . 93

Figure 47: DC Power Distribution Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Figure 48: DC Power Distribution Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Figure 49: DC Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Figure 50: Selecting Input Feed on the DC Power Supply Module . . . . . . . . . . . . . 98

Part 2 Site Planning, Preparation, and Specifications

Chapter 10 Planning and Preparing the Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Figure 51: Airflow Through Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Figure 52: Typical Four-Post Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Figure 53: Turning Diameter of Router Transport Kit . . . . . . . . . . . . . . . . . . . . . . . 114

Figure 54: Measurements of the Router Transport Kit Installed on the MX2020

(Side View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Figure 55: Measurements of the Router Transport Kit Installed on the MX2020

(Front View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Figure 56: Connecting Chassis Grounding Points on the MX2020 Router . . . . . . 118

Figure 57: 4-AWG DC Grounding Cable Lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Figure 58: 6-AWG DC Grounding Cable Lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Figure 59: Chassis Dimensions and Clearance Requirements for the MX2020

Router with the Standard Cable Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Figure 60: Chassis Dimensions and Clearance Requirements for the MX2020

Router with the Extended Cable Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

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List of Figures

Figure 61: Typical Four-Post Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Chapter 11 Transceiver and Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Figure 62: Connecting Power to a Three-Phase Wye AC Power Distribution

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

Chapter 13 AC Power Requirements, Specifications, and Guidelines . . . . . . . . . . . . . . 147

Figure 63: Three-Phase Delta AC Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Figure 64: Three-Phase Wye AC Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Figure 65: Three-Phase Delta AC Power Cord Mating Connector . . . . . . . . . . . . . 157

Figure 66: Three-Phase Wye AC Power Cord Mating Connector . . . . . . . . . . . . . 157

Figure 67: AC Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159

Figure 68: Selecting Input Feed on the AC Power Supply Module . . . . . . . . . . . . 160

Figure 69: Connecting Chassis Grounding Points on the MX2020 Router . . . . . . 161

Figure 70: 4-AWG DC Grounding Cable Lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Figure 71: 6-AWG DC Grounding Cable Lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Figure 72: AC PDM Three-Phase Delta Input Power . . . . . . . . . . . . . . . . . . . . . . . 166

Figure 73: AC PDM Three-Phase Wye Input Power . . . . . . . . . . . . . . . . . . . . . . . . 167

Figure 74: Mapping AC Power Distribution Modules Input to AC Power Supply

Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

Chapter 14 DC Power Requirements, Specifications, and Guidelines . . . . . . . . . . . . . . . 171

Figure 75: Typical DC Source Cabling to the Router . . . . . . . . . . . . . . . . . . . . . . . . 178

Figure 76: 4-AWG DC Power Cable Lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Figure 77: 6-AWG DC Power Cable Lug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Part 3 Initial Installation and Configuration

Chapter 16 Unpacking the Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Figure 78: MX2020 Shipping Crate Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 196

Figure 79: Unpacking the MX2020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

Figure 80: Router Transport Kit Crate Dimensions . . . . . . . . . . . . . . . . . . . . . . . . 201

Figure 81: Open Router Transport Kit Shipping Crate . . . . . . . . . . . . . . . . . . . . . . 202

Figure 82: Router Transport Kit Shipping Crate Door . . . . . . . . . . . . . . . . . . . . . . 203

Chapter 17 Installing the Mounting Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Figure 83: Installing the Mounting Hardware for a Four-Post Rack or Cabinet . . 208

Chapter 18 Installing the Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209

Figure 84: Removing an AC Power Distribution Module Before Installing the

MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Figure 85: Removing a DC Power Distribution Module Before Installing the

MX2020 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

Figure 86: Removing a AC Power Supply Module Before Installing the MX2020

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212

Figure 87: Removing a DC Power Supply Module Before Installing the MX2020

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

Figure 88: Removing Upper Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

Figure 89: Removing Lower Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

Figure 90: Removing an SFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

Figure 91: Removing an MPC without the ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

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Figure 92: Removing a CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218

Figure 93: Installing Pallet Jack Attachment onto Pallet Jack . . . . . . . . . . . . . . . 220

Figure 94: Loading the MX2020 Router onto the Pallet Jack . . . . . . . . . . . . . . . . 221

Figure 95: Securing the MX2020 to the Pallet Jack Attachment . . . . . . . . . . . . . 222

Figure 96: Loading the MX2020 Router into the Rack . . . . . . . . . . . . . . . . . . . . . 223

Figure 97: Preparing the Router Transport Kit for Installation . . . . . . . . . . . . . . . 225

Figure 98: Installing the Router Transport Kit onto the MX2020 . . . . . . . . . . . . . 226

Figure 99: Securing the Crate Door to the Shipping Crate Platform . . . . . . . . . . . 227

Figure 100: Securing the Router Transport Platform . . . . . . . . . . . . . . . . . . . . . . 229

Figure 101: Installing Winch Strap Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230

Figure 102: Installing Winch Mount Bracket to Rack Rails . . . . . . . . . . . . . . . . . . . 231

Figure 103: Align the MX2020 Router with Rack Mounting Shelf . . . . . . . . . . . . . 232

Figure 104: Remove Router Transport Mounting Plate and Wheel Assembly . . . 233

Figure 105: Attaching Winch Strap to Winch Strap Plate . . . . . . . . . . . . . . . . . . . 234

Figure 106: Pulling the MX2020 into the Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Figure 107: Reinstalling an AC Power Distribution Module . . . . . . . . . . . . . . . . . . 238

Figure 108: Reinstalling a DC Power Distribution Module . . . . . . . . . . . . . . . . . . . 238

Figure 109: Reinstalling an AC Power Supply Module . . . . . . . . . . . . . . . . . . . . . 239

Figure 110: Reinstalling a DC Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . 240

Figure 111: Installing Upper Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241

Figure 112: Installing Lower Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241

Figure 113: Reinstalling an SFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

Figure 114: Reinstalling an ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243

Figure 115: Reinstalling an MPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

Figure 116: Reinstalling a CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245

Chapter 19 Connecting the Router to Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

Figure 117: Connecting the Grounding Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248

Figure 118: Connecting Power to a Three-Phase Delta AC Power Distribution

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

Figure 119: Connecting Power to a Three-Phase Wye AC Power Distribution

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

Figure 120: Mapping AC Power Distribution Modules Input to AC Power Supply

Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

Figure 121: Selecting AC Power Subsystem Feed Redundancy . . . . . . . . . . . . . . 259

Figure 122: MX2020 Router with AC Power Supply Modules Installed . . . . . . . . 259

Figure 123: MX2020 AC Power Supply Module Front View . . . . . . . . . . . . . . . . . 260

Figure 124: Connecting DC Power to the MX2020 Router . . . . . . . . . . . . . . . . . . 265

Figure 125: Selecting DC Power Subsystem Feed Redundancy . . . . . . . . . . . . . . 266

Figure 126: MX2020 Router with DC Power Supply Modules Installed . . . . . . . . 266

Figure 127: MX2020 DC Power Supply Module Front View . . . . . . . . . . . . . . . . . . 267

Figure 128: Connecting Power Cables to the DC Power Distribution Module . . . 269

Figure 129: Connecting Ground and DC Power Cables . . . . . . . . . . . . . . . . . . . . . 272

Chapter 20 Connecting the Router to the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

Figure 130: Out-of-Band Management Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

Figure 131: Out-of-Band Management Cable Connector . . . . . . . . . . . . . . . . . . . 276

Figure 132: Console and Auxiliary Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277

Figure 133: Console and Auxiliary Cable Connector . . . . . . . . . . . . . . . . . . . . . . . . 277

Figure 134: Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

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List of Figures

Figure 135: Out-of-Band Management Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

Figure 136: Out-of-Band Management Cable Connector . . . . . . . . . . . . . . . . . . . 279

Figure 137: Console and Auxiliary Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280

Figure 138: Console and Auxiliary Cable Connector . . . . . . . . . . . . . . . . . . . . . . . 280

Figure 139: Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281

Figure 140: Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282

Figure 141: Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283

Figure 142: Attaching a Cable to a MPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285

Figure 143: Attaching a Cable to a MIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285

Chapter 21 Initially Configuring the Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

Figure 144: USB Flash Drive Port on CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288

Chapter 22 Installing and Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293

Figure 145: Installing an AC Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . 295

Figure 146: Installing an ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296

Figure 147: Installing the Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297

Figure 148: Installing the Middle Card Cage Cable Manager Air Filter . . . . . . . . . 298

Figure 149: Installing the PSM Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

Figure 150: Installing the Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300

Figure 151: Installing the Extended Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . 301

Figure 152: Installing a CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

Figure 153: Installing the Standard DC Cable Manager . . . . . . . . . . . . . . . . . . . . 304

Figure 154: Installing a DC Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . 306

Figure 155: Removing the Septum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

Figure 156: Installing the Standard EMI Card Cage Cover . . . . . . . . . . . . . . . . . . 309

Figure 157: Installing the Extended EMI Cover Mounting Brackets . . . . . . . . . . . . 310

Figure 158: Installing the Extended EMI Card Cage Cover . . . . . . . . . . . . . . . . . . . 311

Figure 159: Installing Upper Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

Figure 160: Installing Lower Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313

Figure 161: Installing the Air Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314

Figure 162: Installing the Standard Lower Cable Manager . . . . . . . . . . . . . . . . . . 315

Figure 163: Installing the Septum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316

Figure 164: Installing a MIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317

Figure 165: Installing an SFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323

Figure 166: Installing a Three-Phase Delta AC Power Distribution Module . . . . . 325

Figure 167: Connecting Power to a Three-Phase Delta AC Power Distribution

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326

Figure 168: Installing a Three-Phase Wye AC Power Distribution Module . . . . . . 329

Figure 169: Connecting Power to a Three-Phase Wye AC Power Distribution

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330

Figure 170: Installing the Standard Upper Cable Manager . . . . . . . . . . . . . . . . . . 333

Part 4 Maintaining the Chassis and Components

Chapter 23 Maintaining Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

Figure 171: Upper and Lower Cable Manager Cable Routing . . . . . . . . . . . . . . . . . 339

Figure 172: Air Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345

Figure 173: Air Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370

Figure 174: Upper and Lower Cable Manager Cable Routing . . . . . . . . . . . . . . . . 385

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Figure 175: Do Not Grasp the Connector Edge . . . . . . . . . . . . . . . . . . . . . . . . . . . 405

Figure 176: Do Not Rest the MPC on an Edge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406

Chapter 25 Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415

Figure 177: Removing a CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 420

Figure 178: Installing a CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 422

Figure 179: Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423

Figure 180: Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424

Figure 181: Installing a MIC Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426

Figure 182: Installing an MPC Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426

Figure 183: Removing an AC Power Supply Module from the MX2020 Router . . 429

Figure 184: Installing an AC Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . 431

Figure 185: Removing the Lower Air Filter from the Chassis . . . . . . . . . . . . . . . . . 432

Figure 186: Removing the Middle Card Cage Cable Manager Air Filter . . . . . . . . 433

Figure 187: Removing the PSM Air Filter from the Chassis . . . . . . . . . . . . . . . . . . 434

Figure 188: Installing the Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435

Figure 189: Installing the Middle Card Cage Cable Manager Air Filter . . . . . . . . . 436

Figure 190: Installing the PSM Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 437

Figure 191: Removing the Standard Upper Cable Manager . . . . . . . . . . . . . . . . . 438

Figure 192: Removing the Standard Lower Cable Manager . . . . . . . . . . . . . . . . . 439

Figure 193: Removing the Standard DC Cable Manager . . . . . . . . . . . . . . . . . . . 440

Figure 194: Installing the Standard Lower Cable Manager . . . . . . . . . . . . . . . . . . 441

Figure 195: Installing the Standard Upper Cable Manager . . . . . . . . . . . . . . . . . . 442

Figure 196: Installing the Standard DC Cable Manager . . . . . . . . . . . . . . . . . . . . 443

Figure 197: Removing the Extended Upper Cable Manager . . . . . . . . . . . . . . . . . 444

Figure 198: Removing the Extended Lower Cable Manager . . . . . . . . . . . . . . . . . 445

Figure 199: Removing the Extended DC Cable Manager . . . . . . . . . . . . . . . . . . . 446

Figure 200: Installing the MX2020 Upper Extended Cable Manager . . . . . . . . . 447

Figure 201: Installing the Extended Lower Cable Manager . . . . . . . . . . . . . . . . . 448

Figure 202: Installing the Extended DC Cable Manager . . . . . . . . . . . . . . . . . . . . 449

Figure 203: Removing a CB-RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450

Figure 204: Removing the Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 451

Figure 205: Installing the Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 452

Figure 206: Removing the Extended Craft Interface . . . . . . . . . . . . . . . . . . . . . . . 453

Figure 207: Installing the Extended Craft Interface . . . . . . . . . . . . . . . . . . . . . . . 454

Figure 208: Removing a DC Power Supply Module from the MX2020 Router . . 455

Figure 209: Installing a DC Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . 457

Figure 210: Removing a DC Power Distribution Module from the MX2020

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 459

Figure 211: Installing a DC Power Distribution Module . . . . . . . . . . . . . . . . . . . . . 460

Figure 212: Connecting DC Power to the MX2020 Router . . . . . . . . . . . . . . . . . . 462

Figure 213: Connecting Power Cables to the DC Power Distribution Module . . . 464

Figure 214: Removing the Standard EMI Card Cage Cover . . . . . . . . . . . . . . . . . . 466

Figure 215: Installing the Standard EMI Card Cage Cover . . . . . . . . . . . . . . . . . . . 467

Figure 216: Removing the Extended EMI Card Cage Cover . . . . . . . . . . . . . . . . . . 468

Figure 217: Removing the Extended EMI Cover Mounting Brackets . . . . . . . . . . . 469

Figure 218: Installing the Extended EMI Cover Mounting Brackets . . . . . . . . . . . . 470

Figure 219: Installing the Extended EMI Card Cage Cover . . . . . . . . . . . . . . . . . . . 471

Figure 220: Removing the Upper Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 473

Copyright © 2015, Juniper Networks, Inc.xx

List of Figures

Figure 221: Removing the Lower Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 473

Figure 222: Installing Upper Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474

Figure 223: Installing Lower Fan Trays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 475

Figure 224: Removing the Air Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 476

Figure 225: Installing the Air Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 476

Figure 226: Removing a Single-Wide MIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 478

Figure 227: Installing the Septum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 479

Figure 228: Installing a MIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 481

Figure 229: Removing the Septum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 482

Figure 230: Removing an MPC from the ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 489

Figure 231: Removing an ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 490

Figure 232: Installing an ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 492

Figure 233: Installing an MPC into an ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494

Figure 234: Attaching a Cable to an MPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494

Figure 235: Removing an SFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 496

Figure 236: Installing an SFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501

Figure 237: Removing SFPs or XFPs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503

Figure 238: Three-Phase Delta AC Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . 505

Figure 239: Disconnecting the Power Cord from a Three-Phase Delta AC Power

Distribution Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506

Figure 240: Connecting Power to a Three-Phase Delta AC Power Distribution

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 508

Figure 241: Three-Phase Delta AC Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . 511

Figure 242: Disconnecting the Power Cord from a Three-Phase Delta AC Power

Distribution Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 512

Figure 243: Removing a Three-Phase Delta AC Power Distribution Module . . . . 513

Figure 244: Installing a Three-Phase Delta AC Power Distribution Module . . . . . 515

Figure 245: Connecting Power to a Three-Phase Delta AC Power Distribution

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 516

Figure 246: Three-Phase Wye AC Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . 519

Figure 247: Disconnecting the Power Cord from a Three-Phase Wye AC Power

Distribution Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 520

Figure 248: Removing a Three-Phase Wye AC Power Distribution Module . . . . . 521

Figure 249: Installing a Three-Phase Wye AC Power Distribution Module . . . . . . 523

Figure 250: Connecting Power to a Three-Phase Wye AC Power Distribution

Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 524

Part 6 Safety and Compliance Information

Chapter 29 General Safety Guidelines and Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 553

Figure 251: Placing a Component into an Electrostatic Bag . . . . . . . . . . . . . . . . . 558

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MX2020 3D Universal Edge Router Hardware Guide

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List of Tables

About the Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxvii

Table 1: Notice Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxviii

Table 2: Text and Syntax Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxviii

Part 1 Overview

Chapter 2 System Overview and Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Table 3: Front Components in a Fully Configured MX2020 Router . . . . . . . . . . . . . 6

Table 4: Rear Components in a Fully Configured AC-Powered MX2020

Table 5: Rear Components in a Fully Configured DC-Powered MX2020

Table 6: AC PDM Delta and Wye Current Requirements . . . . . . . . . . . . . . . . . . . . . 15

Table 7: Field-Replaceable Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Table 8: MX2020 Router Hardware Components and CLI Terminology . . . . . . . . . 17

Chapter 3 Chassis Components and Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 9: Front Components in a Fully Configured MX2020 Router . . . . . . . . . . . . 22

Table 10: Rear Components in a Fully Configured AC-Powered MX2020

Table 11: Rear Components in a Fully Configured DC-Powered MX2020

Table 12: AC PDM Delta and Wye Current Requirements . . . . . . . . . . . . . . . . . . . . 31

Table 13: Field-Replaceable Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 14: MX2020 Router Hardware Components and CLI Terminology . . . . . . . . 33

Chapter 4 Alarm and Display Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 15: Craft Interface LEDs, Buttons, and Connectors . . . . . . . . . . . . . . . . . . . . 38

Table 16: Host Subsystem LEDs on the Craft Interface . . . . . . . . . . . . . . . . . . . . . 39

Table 17: Power Supply Module LEDs on the Craft Interface . . . . . . . . . . . . . . . . . 40

Table 18: Line Card LEDs on the Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Table 19: SFB LED on the Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 20: Fan Tray LEDs on the Craft Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 21: Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 22: Alarm LEDs and Alarm Cutoff/Lamp Test Button . . . . . . . . . . . . . . . . . 43

Chapter 6 Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Table 23: Fan Tray LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Chapter 7 Host Subsystem Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Table 24: Components on the RE-MX2000-1800x4 . . . . . . . . . . . . . . . . . . . . . . . 59

Table 25: CB-RE LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

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MX2020 3D Universal Edge Router Hardware Guide

Table 26: Switch Fabric Board LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Chapter 8 Interface Modules—ADCs, MPCs, and MICs . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Table 27: MPCs Supported by MX240, MX480, MX960, MX2010, and MX2020

Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Table 28: MICs Supported by MX240, MX480, MX960, MX2010, and MX2020

Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Table 29: MICs Supported by MX5, MX10, MX40, MX80, and MX104 Routers . . . 76

Chapter 9 Power Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Table 30: Supported MX2020 Power System Components . . . . . . . . . . . . . . . . . 85

Table 31: Three-Phase Delta AC PDM LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Table 32: MX2020 AC Power Supply Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . 94

Table 33: DC Power Distribution Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Table 34: DIP Switch Positions on the DC PSM . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

Table 35: MX2020 DC Power Supply Module LEDs . . . . . . . . . . . . . . . . . . . . . . . . 99

Part 2 Site Planning, Preparation, and Specifications

Chapter 10 Planning and Preparing the Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Table 36: MX2020 Shipping Weight Specifications . . . . . . . . . . . . . . . . . . . . . . . 108

Table 37: Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Table 38: Router Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Table 39: DC Power Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Table 40: MX2020 Site Preparation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Table 41: MX2020 Shipping Weight Specifications . . . . . . . . . . . . . . . . . . . . . . . . 123

Chapter 11 Transceiver and Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Table 42: Estimated Values for Factors Causing Link Loss . . . . . . . . . . . . . . . . . . 129

Table 43: Cable and Wire Specifications for Routing Engine Management and

Alarm Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Table 44: Supported Three-Phase Wye AC Wire Gauge . . . . . . . . . . . . . . . . . . . . 133

Table 45: Supported Ethernet Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Table 46: Supported SONET Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Chapter 12 Pinout Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Table 47: RJ-45 Connector Pinout for the Auxiliary and Console Ports . . . . . . . . 145

Table 48: RJ-45 Connector Pinout for the CB-RE Management Port . . . . . . . . . . 146

Chapter 13 AC Power Requirements, Specifications, and Guidelines . . . . . . . . . . . . . . 147

Table 49: Base AC Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Table 50: Typical AC Power Requirements for MX2020 Router . . . . . . . . . . . . . . 148

Table 51: MX2020 FRU AC Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 148

Table 52: Three-Phase Delta and Wye AC Power Cord Specifications . . . . . . . . . 154

Table 53: Single-Phase AC Power Cord Specifications . . . . . . . . . . . . . . . . . . . . . 155

Table 54: Three-Phase Delta and Wye AC Power Cord Mating Cable Connector

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

Table 55: MX2020 AC Power Subsystem Electrical Specifications . . . . . . . . . . . 158

Table 56: DIP Switch Positions on the AC PSM . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Table 57: DC Power Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Copyright © 2015, Juniper Networks, Inc.xxiv

List of Tables

Table 58: Three-Phase Delta AC Power Distribution Module Electrical

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Table 59: Three-Phase Wye AC Power Distribution Module Electrical

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Table 60: Seven-Feed Single-Phase AC Power Distribution Module Electrical

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Table 61: Single-Phase AC Power Distribution Module Electrical

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Table 62: Calculating AC Power Budget . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Table 63: Calculating AC Thermal Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Table 64: Input AC Power Mapping for PDM0 and PDM1 . . . . . . . . . . . . . . . . . . . 169

Table 65: Input AC Power Mapping for PDM2 and PDM3 . . . . . . . . . . . . . . . . . . . 170

Chapter 14 DC Power Requirements, Specifications, and Guidelines . . . . . . . . . . . . . . . 171

Table 66: FRU DC Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Table 67: DC PSM Electrical Specifications Per Input Configurations . . . . . . . . . . 179

Table 68: MX2020 DC Power Zoning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Table 69: Typical DC Power Requirements for MX2020 Router . . . . . . . . . . . . . . 182

Table 70: Calculating DC Power Budget . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Table 71: Calculating DC Input Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Table 72: Calculating DC Thermal Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

Table 73: DC Power Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Part 3 Initial Installation and Configuration

Chapter 16 Unpacking the Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

Table 74: Parts List for a Fully Configured MX2020 Router . . . . . . . . . . . . . . . . . 199

Table 75: Accessory Box Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

Chapter 17 Installing the Mounting Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Table 76: Mounting Hole Locations for Installing the Four-Post Mounting

Shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

Table77: Mounting Hole Locationsfor Installing a MX2020 Chassis in a Four-Post

Rack or Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Chapter 19 Connecting the Router to Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247

Table 78: Supported Three-Phase Delta AC Wire Gauge . . . . . . . . . . . . . . . . . . . 251

Table 79: Supported Three-Phase Wye AC Wire Gauge . . . . . . . . . . . . . . . . . . . . 255

Table 80: Input AC Power Mapping for PDM0 and PDM1 . . . . . . . . . . . . . . . . . . . 257

Table 81: Input AC Power Mapping for PDM2 and PDM3 . . . . . . . . . . . . . . . . . . . 258

Table 82: MX2010 DC Power System Input Voltage . . . . . . . . . . . . . . . . . . . . . . . 272

Chapter 20 Connecting the Router to the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

Table 83: Out-of-Band Management Port on the MX2020 CB-RE . . . . . . . . . . . 276

Table 84: Console and Auxiliary Ports on the MX2020 CB-RE . . . . . . . . . . . . . . . 277

Table 85: Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278

Table 86: Out-of-Band Management Port on the MX2020 CB-RE . . . . . . . . . . . 279

Table 87: Console and Auxiliary Ports on the MX2020 CB-RE . . . . . . . . . . . . . . 280

Table 88: Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281

Table 89: Connecting Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282

Table 90: Alarm Relay Contacts on the Craft Interface . . . . . . . . . . . . . . . . . . . . 283

xxvCopyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Chapter 22 Installing and Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293

Table 91: Supported Three-Phase Delta AC Wire Gauge . . . . . . . . . . . . . . . . . . . 327

Table 92: Supported Three-Phase Wye AC Wire Gauge . . . . . . . . . . . . . . . . . . . . 331

Part 4 Maintaining the Chassis and Components

Chapter 23 Maintaining Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337

Table 93: Effect of Taking the Host Subsystem Offline . . . . . . . . . . . . . . . . . . . . 403

Chapter 25 Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415

Table 94: Tools and Parts Required for Component Replacement . . . . . . . . . . . 416

Table 95: Alarm Relay Contacts on the Craft Interface . . . . . . . . . . . . . . . . . . . . 423

Table 96: Connecting Alarm Relay Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424

Table 97: Supported Three-Phase Delta AC Wire Gauge . . . . . . . . . . . . . . . . . . . 509

Table 98: Supported Three-Phase Delta AC Wire Gauge . . . . . . . . . . . . . . . . . . . 517

Table 99: Supported Three-Phase Wye AC Wire Gauge . . . . . . . . . . . . . . . . . . . 525

Part 5 Troubleshooting Hardware

Chapter 27 Troubleshooting Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 531

Table 100: MX2020 Cooling System Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 535

Copyright © 2015, Juniper Networks, Inc.xxvi

About the Documentation

•

Documentation and Release Notes on page xxvii

•

Supported Platforms on page xxvii

•

Documentation Conventions on page xxvii

•

Documentation Feedback on page xxix

•

Requesting Technical Support on page xxx

Documentation and Release Notes

To obtain the most current version of all Juniper Networks®technical documentation,
see the product documentation page on the Juniper Networks website at

http://www.juniper.net/techpubs/.

If the information in the latest release notes differs from the information in the
documentation, follow the product Release Notes.

Juniper Networks Books publishes books by Juniper Networks engineers and subject
matter experts. These books go beyond the technical documentation to explore the
nuances of network architecture, deployment, and administration. The current list can
be viewed at http://www.juniper.net/books.

Supported Platforms

For the features described in this document, the following platforms are supported:

•

MX2020

Documentation Conventions

Table 1 on page xxviii defines notice icons used in this guide.

xxviiCopyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Table 1: Notice Icons

DescriptionMeaningIcon

Indicates important features or instructions.Informational note

Indicates a situation that might result in loss of data or hardware damage.Caution

Alerts you to the risk of personal injury or death.Warning

Alerts you to the risk of personal injury from a laser.Laser warning

Indicates helpful information.Tip

Table 2 on page xxviii defines the text and syntax conventions used in this guide.

Table 2: Text and Syntax Conventions

Represents text that you type.Bold text like this

Fixed-width text like this

Italic text like this

Italic text like this

Represents output that appears on the
terminal screen.

•

Introduces or emphasizes important
new terms.

•

Identifies guide names.

•

Identifies RFC and Internet draft titles.

Represents variables (options for which
you substitute a value) in commands or
configuration statements.

Alerts you to a recommended use or implementation.Best practice

ExamplesDescriptionConvention

To enter configuration mode, type the
configure command:

user@host> configure

user@host> show chassis alarms

No alarms currently active

•

A policy term is a named structure
that defines match conditions and
actions.

•

Junos OS CLI User Guide

•

RFC 1997, BGP Communities Attribute

Configure the machine’s domain name:

[edit]
root@# set system domain-name

domain-name

Copyright © 2015, Juniper Networks, Inc.xxviii

Table 2: Text and Syntax Conventions (continued)

Text like this

Represents names of configuration
statements, commands, files, and
directories;configurationhierarchy levels;
or labels on routing platform
components.

About the Documentation

ExamplesDescriptionConvention

•

To configure a stub area, include the

stub statement at the [edit protocols
ospf area area-id] hierarchy level.

•

The console port is labeled CONSOLE.

stub <default-metric metric>;Encloses optional keywords or variables.< > (angle brackets)

| (pipe symbol)

# (pound sign)

[ ] (square brackets)

Indention and braces ( { } )

; (semicolon)

GUI Conventions

Bold text like this

Indicates a choice between the mutually
exclusivekeywords or variables on either
side of the symbol. The set of choices is
often enclosed in parentheses for clarity.

same line as the configuration statement
to which it applies.

Encloses a variable for which you can
substitute one or more values.

Identifies a level in the configuration
hierarchy.

Identifies a leaf statement at a
configuration hierarchy level.

Representsgraphicaluser interface (GUI)
items you click or select.

broadcast | multicast

(string1 | string2 | string3)

rsvp { # Required for dynamic MPLS onlyIndicates a comment specified on the

community name members [
community-ids ]

[edit]
routing-options {

static {

route default {

nexthop address;
retain;

}

}

}

•

In the Logical Interfaces box, select

All Interfaces.

•

To cancel the configuration, click

Cancel.

> (bold right angle bracket)

Documentation Feedback

We encourage you to provide feedback, comments, and suggestions so that we can
improve the documentation. You can provide feedback by using either of the following
methods:

•

Online feedback rating system—On any page at the Juniper Networks Technical
Documentation site at http://www.juniper.net/techpubs/index.html, simply click the
stars to ratethe content, and use the pop-up form to provide us with information about
your experience. Alternately, you can use the online feedback form at

http://www.juniper.net/techpubs/feedback/.

Separates levels in a hierarchy of menu
selections.

In the configuration editor hierarchy,
select Protocols>Ospf.

xxixCopyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

•

E-mail—Sendyour comments to [e-mail] the document
or topic name, URL or page number, and software version (if applicable).

Requesting Technical Support

Technicalproduct support is available through the Juniper Networks TechnicalAssistance
Center (JTAC). If you are a customer with an active J-Care or Partner Support Service
support contract, or are covered under warranty, and need post-sales technical support,
you can access our tools and resources online or open a case with JTAC.

•

JTAC policies—For a complete understanding of our JTAC procedures and policies,
review the JTAC User Guide located at

http://www.juniper.net/us/en/local/pdf/resource-guides/7100059-en.pdf.

•

Product warranties—For product warranty information, visit

http://www.juniper.net/support/warranty/.

•

JTAC hours of operation—The JTAC centers have resources available 24 hours a day,
7 days a week, 365 days a year.

Self-Help Online Tools and Resources

For quick and easy problem resolution, Juniper Networks has designed an online
self-service portal called the Customer Support Center (CSC) that provides you with the
following features:

•

Find CSC offerings: http://www.juniper.net/customers/support/

•

Search for known bugs: http://www2.juniper.net/kb/

•

Find product documentation: http://www.juniper.net/techpubs/

•

Find solutions and answer questions using our Knowledge Base: http://kb.juniper.net/

•

Download the latest versions of software and review release notes:

http://www.juniper.net/customers/csc/software/

•

Search technical bulletins for relevant hardware and software notifications:

http://kb.juniper.net/InfoCenter/

•

Join and participate in the Juniper Networks Community Forum:

http://www.juniper.net/company/communities/

•

Open a case online in the CSC Case Management tool: http://www.juniper.net/cm/

To verify service entitlement by product serial number, use our Serial Number Entitlement
(SNE) Tool: https://tools.juniper.net/SerialNumberEntitlementSearch/

Opening a Case with JTAC

You can open a case with JTAC on the Web or by telephone.

•

Use the Case Management tool in the CSC at http://www.juniper.net/cm/.

•

Call 1-888-314-JTAC (1-888-314-5822 toll-free in the USA, Canada, and Mexico).

Copyright © 2015, Juniper Networks, Inc.xxx

About the Documentation

For international or direct-dial options in countries without toll-free numbers, see

http://www.juniper.net/support/requesting-support.html.

xxxiCopyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Copyright © 2015, Juniper Networks, Inc.xxxii

PART 1

Overview

•

MX2020 Router Overview on page 3

•

System Overview and Architecture on page 5

•

Chassis Components and Descriptions on page 21

•

Alarm and Display Components on page 37

•

Cable and Rack Management on page 45

•

Cooling System on page 53

•

Host Subsystem Components on page 57

•

Interface Modules—ADCs, MPCs, and MICs on page 67

•

Power Subsystem on page 83

1Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Copyright © 2015, Juniper Networks, Inc.2

CHAPTER 1

MX2020 Router Overview

•

MX2020 Router Overview on page 3

MX2020 Router Overview

The MX2020 3D Universal Edge Router is an Ethernet-optimized edge router that provides
both switching and carrier-class Ethernet routing. The MX2020 router enables a wide
range of business and residential applications and services, including high-speed transport
and VPN services, next-generation broadband multiplay services, and high-volume
Internet data center internetworking.

The MX2020 chassis provides redundancy and resiliency. All major hardware components
including the power system, the cooling system, the control board and the switch fabrics
are fully redundant.

The MX2020 router is 45 rack units (U) tall. One router can be installed in a four-post
rack or cabinet. The MX2020 router has 20 dedicated line card slots which means a
maximum of 20 Modular Port Concentrators (MPCs) including adapter cards (ADCs),
and Modular Interface Cards (MICs), a host subsystem consisting of 2 Control Board with
Routing Engines (CB-REs), and 8 Switch Fabric Boards (SFBs).

Related

Documentation

Up to 2 MICs can be installed in each MPC. Fully populated, the MX2020 router supports
up to 40 MICs.

For a list of the supported MPCs, and MICs, see the MX Series Interface Module Reference.

• MX2020 Component Redundancy on page 12

• MX2020 Physical Specifications on page 108

• MX2020 Chassis Description on page 5

• MX2020 Host Subsystem Description on page 57

• MX2020 Craft Interface Description on page 37

• MX2020 Power Subsystem Description on page 83

• MX2020 Cooling System Description on page 53

3Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Copyright © 2015, Juniper Networks, Inc.4

CHAPTER 2

System Overview and Architecture

•

MX2020 Chassis Description on page 5

•

MX2020 Backplane Description on page 11

•

MX2020 Component Redundancy on page 12

•

MX2020 Field-Replaceable Units on page 16

•

MX2020 Router Hardware Components and CLI Terminology on page 17

MX2020 Chassis Description

The router chassis is a rigid sheet metal structure that houses all the other router
components, (see Figure 1 on page 6, Figure 2 on page 8, and Figure 3 on page 9). The
chassis installs in a standard 19-in. four-post rack or enclosed cabinet.

NOTE: There must be a minimum of 45-U of usable rackspace when installing

the MX2020 router into a 45-U rack.

NOTE: If you are installing the MX2020 router into a network cabinet, make

sure that no hardware, device, rack,or cabinet component obstructs the 45-U
rack space from access during installation.

There are two types of chassis configurations available for the MX2020:

•

The chassis with standard cable managers and EMI coversmeasures78.75 in. (200 cm)
high, 19 in. (48.26 cm) wide, and 36.20 in. (91.95 cm) deep.

•

The chassis with extended cable managers and extended EMI covers measures

78.75 in. (200 cm) high, 19 in. (48.26 cm) wide, and 38.67 in. (98.2 cm) deep.

CAUTION: Before removing or installing components, attach an ESD strap

to an ESD point, and place the other end of the strap around your bare wrist.
Failure to use an ESD strap could result in damage to the hardware
components.

5Copyright © 2015, Juniper Networks, Inc.

g007102

RE0

RE1

MASTER

ONLINE

OFFLINE

PSM

1
2

3
4

5
6

7
8

0

10
11

12
13

14
15

16
17

9

MX2200

LC

CB-RE

LC

SFB

10

0

0

11

0

1

12

1

2

13

2

3

14

3

4

15

4

5

16

5

6

17

6

7

18

7

8

19

1

9

LC

CB-RE

LC

SFB

1

4

3

2

MX2020 3D Universal Edge Router Hardware Guide

WARNING: The router must be connected to earth ground during normal

operation.

NOTE: One router can be installed in a 45-U four-post rack if the rack can

support the combined weight, which can be greaterthan 1,500 lb (680.39 kg).

Mounting hardware includes built-in front-mounting flanges on the front of the chassis,
and one large shelf attached to a four-post rack or cabinet to support the chassis.

Figure 1: Front View of a Fully Configured MX2020 Router Chassis

Remove field replacement units (FRUs) from the front of the MX2020 router before you
install the router. See Table 3 on page 6 for information on MX2020 router components.

Table 3: Front Components in a Fully Configured MX2020 Router

Component

1

DescriptionComponent No.

2

manager– (standard
or extended)

MICs (top)

Copyright © 2015, Juniper Networks, Inc.6

Number of FRUsSlots

1–Upper cable

1010 through 19 (top)MPCs with ADCs and

Chapter 2: System Overview and Architecture

Table 3: Front Components in a Fully Configured MX2020
Router (continued)

Component
DescriptionComponent No.

Number of FRUsSlots

3

(SFBs)

4

filter

5

Routing Engine
(CB-RE)

6

MICs (bottom)

7

manager– (standard
or extended)

80 through 7Switch Fabric Boards

1–Middle card cage air

20 and 1Control Board and

100 through 9MPCs with ADCs and

1–Lower cable

NOTE: A combination middle cable manager and air filter is installed over

the middle card cage.

7Copyright © 2015, Juniper Networks, Inc.

D

g007081

1

10

2

3

4

5

6

7

8

9

11

MX2020 3D Universal Edge Router Hardware Guide

Figure 2: Rear View of a Fully Configured AC-Powered MX2020 Router
Chassis

Remove field replacement units (FRUs) from the rear of the MX2020 router before you
install the router. See Table 4 on page 8 for information on MX2020 router components.

Table 4: Rear Components in a Fully Configured AC-Powered MX2020
Router

Component
No.

2

Component
Description

Upper fan trays (two)1

delta or wye

Number of FRUsSlots

2Fan tray 2 and fan tray 3

(behind cage door)

1PDM3/Input1AC PDM—Three-phase

99 through 17AC PSM3

1–PSM air filter4

Copyright © 2015, Juniper Networks, Inc.8

g007103

2

1

3

6

7

10

12

4

5

8

9

11

Chapter 2: System Overview and Architecture

Table 4: Rear Components in a Fully Configured AC-Powered MX2020
Router (continued)

Component
No.

5

6

9

Component
Description

delta or wye

delta or wye

delta or wye

Lower fan trays (two)11

Number of FRUsSlots

1PDM2/Input0AC PDM—Three-phase

1PDM1/Input1AC PDM—Three-phase

90 through 8AC PSM7

1–PSM air filter8

1PDM0/Input0AC PDM)—Three-phase

1–Fan tray air filter10

2Fan tray 0 and fan tray 1

(behind access door)

Figure 3: Rear View of a Fully Configured DC-Powered MX2020 Router
Chassis

9Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Remove field replacement units (FRUs) from the rear of the MX2020 router before you
install the router. See Table 5 on page 10 for information on MX2020 router components.

Table 5: Rear Components in a Fully Configured DC-Powered MX2020
Router

Component
No.

10

Component
Description

Upper fan trays (two)1

manager–(standard or
extended)

Number of FRUsSlots

2Fan tray 2 and fan tray 3

(behind cage door)

1PDM3/Input1DC PDM2

99 through 17DC PSM3

1–PSM air filter4

1PDM2/Input0DC PDM5

1PDM1/Input1DC PDM6

90 through 8DC PSM7

1–PSM air filter8

1PDM0/Input0DC PDM9

4–DC cable

1–Fan tray air filter11

Lower fan tray (two)12

(behind access door)

2Fan tray 0 and fan tray 1

The MX2020 router has four electrostatic discharge (ESD) points. Two are located on
either side of the upper MPCs on the front of the chassis. A second pair is located on
either side of the lower MPCs on the front of the chassis (see Figure 4 on page 11).

Copyright © 2015, Juniper Networks, Inc.10

Figure 4: MX2020 Router ESD Points

10

11

12

13

14

15

16

17

18

19

RE0

RE1
MASTER

ONLINE

OFFLINE

PSM

1

2

3

4
5

6

7

8

0

10

11
12

13
14

15

16

17

9

MX2200

LC

CB-RE

LC

SFB

10

0

0

11

0

1

12

1

2

13

2

3

14

3

4

15

4

5

16

5

6

17

6

7

18

7

8

19

1

9

LC

CB-RE

LC

SFB

g007056

ESD

points

Chapter 2: System Overview and Architecture

Related

Documentation

MX2020 Physical Specifications on page 108•

• Installing the MX2020 Mounting Hardware for a Four-Post Rack or Cabinet on page 205

• MX2020 Router Grounding Specifications on page 117

• MX2020 Chassis Moving Guidelines on page 107

MX2020 Backplane Description

Backplanes are located toward the rear of the chassis and form the rear of the card cage.
They consist of one upper signal and power backplane located at the top of the chassis,

11Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

and one lower signal and power backplane located at the bottom of the chassis. The
Switch Fabric Boards (SFBs) connect both upper and lower backplanes. The adapter
cards (ADCs) are carrier cards used to house the MPCs. The MPCs install into the top
and bottom card cage backplanes from the front of the chassis and mate to the signal
backplanes. The SFBs and CB-REs install into the middle from the front of the chassis.
The PSMs and PDMs install into the top and bottom power backplanes from the rear of
the chassis. The cooling system components also connect to the top and bottom
backplanes.

The backplane performs the following major functions:

•

Data path—Data packets are transferred across the backplane between the MPCs
through the fabric ASICs on the SFBs.

•

Power distribution—The router PDMs relay power from the feeds to the input of the
PSMs through the power midplane. In addition, the output power from PSMs is
distributed to the components of the chassis (MPCs, SFBs, and CB-REs), using the
power backplane.

•

Control/Management path—The backplane provides management and control path
connectivity among the various system components.

Related

Documentation

MX2020 Router Overview on page 3•

• MX2020 Chassis Description on page 5

• MX2020 Modular Port Concentrator Description on page 68

• MX2020 Switch Fabric Board Description on page 64

• MX2020 Host Subsystem Description on page 57

• MX2020 Modular Interface Card Description on page 73

• MX2020 Power Subsystem Description on page 83

• MX2020 Power Midplane Description on page 85

MX2020 Component Redundancy

A fully configured router is designed so that no single point of failure can cause the entire
system to fail. Only a fully configured router provides complete redundancy. All other
configurations provide partial redundancy. The following major hardware components
are redundant:

•

Host subsystem—The host subsystem consists of a combined Control Board and
Routing Engine (CB-RE) functioning together. The router can have one or two host
subsystems. If two host subsystems are installed, one functions as the master and the
other functions as the backup. If the master host subsystem (or either of its
components) fails, the backup can take over as the master.

•

DC power subsystem—The MX2020 DC power system is made up of two subsystems.
Each subsystem provides power to ten line card slots, one local fan tray and critical
FRUs. These critical FRUs consist of two CB-REs, eight SFBs located in the center of

Copyright © 2015, Juniper Networks, Inc.12

g007088

Available power

20 KW

Power

zone 1

LC 10-19
fan tray 3

Available power: 14.5 KW

Available power: 5.5 KW from zone 1
Available power: 5.5 KW from zone 0

Available power

20 KW

Power

zone 0

LC 0-9

fan tray 1

Available power: 14.5 KW

SFB 0-7, CB0,

CB1, fan tray 0,

fan tray 2

g007087

PDM 0

(feed A)

PDM 1

(feed B)

PSM

0

PSM

1

PSM

8

Chapter 2: System Overview and Architecture

the chassis, and two fan trays (one for each zone). Specifically, each power subsystem
has enough power delivery capacity to power ten line card slots, three fan trays, two
CB-REs, and eight SFBs. There are nine DC power supply modules (PSMs), and two
DC power distribution modules (PDMs) in each subsystem. This means, if one power
subsystem stops functioning for any reason, only the MPCs will stop functioning, but
the router will continue functioning, (see Figure 5 on page 13).

Figure 5: Power Distribution from Each Power Subsystem to the FRUs

•

DC power feed redundancy—The MX2020 router subsystem is feed redundant. Each
PSM can be connected to two separate feeds from different sources that are used to
provide feed redundancy. There are two PDMs per power subsystem that carry nine
feeds each. Users should connect feeds from one power source to one PDM and feeds
from the other power source to the second PDM of the power subsystem, (see

Figure 6 on page 13).

Figure 6: DC Power Subsystem Feed Redundancy

Each PSM has a set of two DIP switches located on the faceplate. These DIP switches
are used to indicate whether a user wants to connect one feed to the power subsystem,
two feeds, or none. These DIP switches provide critical information to the power
management subsystem to help generate alarms in case of a feed failure or a wrong
connection. Each PDM has an LED per feed indicating whether the feed is active or not,
or whether the feed is connected properly. See “MX2020 DC Power Supply Module

Description” on page 96.

•

AC power subsystem—The MX2020 supports connection of a three-phase AC power
system. There are two types of three-phase power systems: the three-phase delta

13Copyright © 2015, Juniper Networks, Inc.

g007085

AC PS_0

2800W

input

AC PS_3

2800W

input

AC PS_1

2800W

input

AC PS_4

2800W

input

AC PS_2

2800W

input

AC PS_5

2800W

input

A1

B1

AC PS_8

2800W

input

A2

B2

C2

AC PS_6

2800W

input

AC PS_7

2800W

input

C1

g007086

AC PS_0

2800W

input

AC PS_3

2800W

input

AC PS_2

2800W

input

AC PS_5

2800W

input

A1

B1

C1

AC PS_1

2800W

input

AC PS_4

2800W

input

NE1

C2

NE2

AC PS_6

2800W

input

A2

B2

AC PS_7

2800W

input

AC PS_8

2800W

input

MX2020 3D Universal Edge Router Hardware Guide

and three-phase wye. The AC power going to the PSMs is split into three individual
phases—each PSM works on a single phase. This means the power system works
independent of the kind of AC feed is connected. The user can connect one or two
feeds, depending on the power system configuration (number of PSMs, redundancy,
etc.). Each phase from each of the two feeds is distributed among one or two PSMs
(one feed has each phase going to two PSMs, and the other feed has each phase going
to a single PSM). See Figure 7 on page 14 and Figure 8 on page 14.

Figure 7: Power Distribution from Three-Phase Feed Delta PDM to the AC
PSMs

Figure 8: Power Distribution from Three-Phase Feed Wye PDM to the AC
PSMs

The AC power subsystem is feed redundant, each PSM takes in two AC feeds and uses
one of the two. One AC feed is active at a time. If one feed fails, the PSM automatically
switches over to the other feed without disrupting system function, (see “MX2020

Three-Phase Delta AC Power Distribution Module Description” on page 86, “MX2020
Three-PhaseWyeAC PowerDistribution Module Description” on page 88, and “MX2020
AC Power Supply Module Description” on page 158).

Copyright © 2015, Juniper Networks, Inc.14

Chapter 2: System Overview and Architecture

•

AC power requirements—Table 6 on page 15 shows the MX2020 current requirements
for the three–phase delta and wye power feeds.

Table 6: AC PDM Delta and Wye Current Requirements

Three–Phase
Voltage

(minimum–nominal)
(line-to-line) for delta
(per phase)

(minimum–nominal)
(line-to-neutral) for
wye (per phase)

Current Delta per
Three-Phase PDMInput Feed

Current Wye per
Three-Phase PDM

–50 A1200 V

–25 A2

30 A–1200 V

15 A–2

NOTE: This is the minimum required to provide 2.5KW per PSM. Based on

facilitiesguidelines, you should over-provision the MX2020 router. The two
numbers listed in the current columns reflect the distribution of phases
from the feed to PSM. For example, from one feed each phase goes to two
PSMs and from other feed each phase goes to only one PSM.

•

PDMs—In the DC configuration, each subsystem provides N+1 PSM redundancy along
with N+N feed redundancy. The power feeds from different sources need to be
connected to different PDMs. If feeds that connect to one PDM fail in a redundant
configuration, the other feed kicks in to provide full power. A total of four PDMs can be
installed into a router. Each DC PDM operates with up to nine separate feeds of either
60 A or 80 A current limit. The capacity of these feeds is relayed to system software
through a switch located on the DC PDM. The MX2020 router supports two types of
three-phase power system PDMs. The three-phase delta and three-phase wye.
Individual phases are taken from three-phase feeds to individual PSMs. One AC feed
provides power to six PSMs, while the second input feed provides power to the
remaining three PSMs (supporting a total of nine PSMs).

•

PSMs—All AC or DC PSMs in a subsystem share the load (the nine PSMs on the top
half share the load, as well as the nine PSMs on the bottom share the load). If one PSM
fails in a redundant configuration, the remaining PSMs provide power to FRUs. In the
AC or DC configuration, up to eighteen PSMs may be required to supply power to a
fully configured router. Nine PSMs in the lower card cage supply power to the two
CB-REs (active and redundant), eight SFBs, lower ten MPCs, two lower fan trays and
one fan tray on the top half. Nine PSMs in the upper card cage supply power to the two
upper fan trays, upper ten MPCs, two CB-REs (active and redundant), eight SFBs, and
a fan tray in the lower card cage. A portion of power from each zone is reserved to
power critical FRUs. These FRUs allow the system to operate even if power to a
complete zone fails.

•

Cooling system—The cooling system has a total of four fan trays— two per zone—which
are controlled by the host subsystem. Each zone is made up of a set of ten MPCs, four

15Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

SFBs, and one CB-RE, (see “MX2020 Cooling System Description” on page 53). If one
of the fans fails, the host subsystem increases the speed of the remaining fans to
provide sufficient, cooling for the router. The fan trays are powered by two power
subsystems that are divided into zones (upper zone 1 and lower zone 0).

Related

Documentation

MX2020 Router Overview on page 3•

• Displaying MX2020 Router Components and Serial Numbers

• Guidelines for Packing Router Components for Shipment on page 409

• Returning a Hardware Component to Juniper Networks, Inc. on page 412

MX2020 Field-Replaceable Units

Field-replaceable units (FRUs) are router components that can be replaced at the
customer site (see Table 7 on page 17). Replacing most FRUs requires minimal router
downtime. The router uses the following types of FRUs:

•

Hot-removable and hot-insertable FRUs—You can remove and replace these
components without powering off the router or disrupting the routing functions.

•

Hot-pluggableFRUs—Youcan remove and replacethese components without powering
off the router, but the routing functions of the system are interrupted when the
component is removed.

NOTE: Before you replace most host subsystem components, such as the

Control Board and Routing Engine (CB-RE), you must take the host
subsystem offline.

Table 7 on page 17 lists the FRUs for the MX2020 router.

Copyright © 2015, Juniper Networks, Inc.16

Table 7: Field-Replaceable Units

Chapter 2: System Overview and Architecture

Hot-Pluggable FRUsHot-Removable and Hot-Insertable FRUs

Related

Documentation

•

PSM air filters

•

Air filter (lower)

•

Standard upper cable manager

•

Standard lower cable manager

•

Standard DC cable manager

•

Extended upper cable manager (optional)

•

Extended lower cable manager (optional)

•

Extended DC cable manager (optional)

•

Craft interface

•

Switch Fabric Board (SFB) (if redundant)

•

Backup CB-RE (if redundant)

•

Master CB-RE (if nonstop active routing is

•

Control Board and Routing
Engine (CB-RE) (nonredundant)

•

Switch Fabric Board (SFB)
(nonredundant)

configured)

•

Modular Port Concentrators (MPCs)

•

Adapter cards (ADCs)

•

Modular Interface Cards (MICs)

•

AC power supply modules (if redundant)

•

AC power distribution modules (if redundant)

•

DC power supply modules (if redundant)

•

DC power distribution modules (if redundant)

•

Fan trays

Taking an MX2020 Host Subsystem Offline on page 401•

• Tools and Parts Required for Replacing MX2020 Hardware Components on page 416

• Replacing the MX2020 Cable Managers on page 437

• Replacing the MX2020 Craft Interface on page 450

• Replacing an MX2020 Fan Tray on page 471

• Replacing the MX2020 Air Filters on page 431

MX2020 Router Hardware Components and CLI Terminology

The MX2020 router supports the components in Table 8 on page 17.

Table 8: MX2020 Router Hardware Components and CLI Terminology

MX2020CHAS-BP-MX2020Chassis

DescriptionCLI NameHardware Model NumberComponent

“MX2020 Physical Specifications”
on page 108

“MX2020 Chassis Description” on
page 5

17Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Table 8: MX2020 Router Hardware Components and CLI Terminology (continued)

DescriptionCLI NameHardware Model NumberComponent

MX2020-PREMIUM2-ACAC Optimized Power

Chassis

MX2020-PREMIUM2-DCDC Optimized Power

Chassis

MX2K-FPD-KIT-SExtended craft interface

panel

Cooling system, including air baffle, fan trays, and air filters

Tray

Power System Components

module (PDM)

Front Panel DisplayMX2020-CRAFTCraft interface panel

“MX2020 Craft Interface
Description” on page 37

“MX2020 Craft Interface
Description” on page 37

“MX2020 Cooling System
Description” on page 53

172mm FanTray - 6 FansMX2000-FANTRAYFan tray

Optimized Power fan trayMX2K-FANTRAYOptimized Power Fan

N/AMX2000-UPR-BAFFLEAir baffle

N/AMX2020-FLTR-KIT-SAir filter kit

“MX2020 Power Subsystem
Description” on page 83

N/AMX2000-PDM-BLANKPDM blank cover

“MX2020 DC Power Distribution
Module Description” on page 94

DC 52V Power Dist ModuleMX2000-PDM-DCPower distribution

AC Delta PowerDist ModuleMX2000-PDM-AC-DELTA

“MX2020 Three-Phase Delta AC
Power Distribution Module
Description” on page 86

MX2K-PDM-OP-DC

AC Y Power Dist ModuleMX2000-PDM-AC-WYE

Single-phase AC PDMMX2K-PDM-AC-1PH

Single-phaseACPDM (6+1)MX2K-PDM-OP-AC

Optimized Power DC PDM
(6+1)

“MX2020 Three-Phase Wye AC
Power Distribution Module
Description” on page 88

Copyright © 2015, Juniper Networks, Inc.18

Chapter 2: System Overview and Architecture

Table 8: MX2020 Router Hardware Components and CLI Terminology (continued)

DescriptionCLI NameHardware Model NumberComponent

(PSM)

MIC

MPC

Routing Engine (CB-RE)

N/AMX2000-PSM-BLANKPSM blank cover

MX2000-PSM-ACPower supply module

MX2000-PSM-DC

AC 52V Power Supply
Module

DC 52V Power Supply
Module

See MX Series Interface Module Reference

N/AMX2000-LC-BLANKMPC blank cover

See MX Series Interface Module Reference

Adapter CardMX2000-LC-ADAPTERADC

N/AMX2000-RE-SFB-BLANKSFB blank cover

Switch Fabric BoardMX2000-SFBSFB

N/AMX2000-RE-SFB-BLANKCB-RE blank cover

Control BoardRE-MX2000-1800X4Control Board and

“MX2020 Power Subsystem
Description” on page 83

“MX2020 Modular Interface Card
Description” on page 73

“MX2020 Modular Port
Concentrator Description” on
page 68

“MX2020 Adapter Card (ADC)
Description” on page 67

“MX2020 Switch Fabric Board
Description” on page 64

“MX2020 CB-RE Description” on
page 59

Routing Engine (CB-RE)

Transceiver

Related

Documentation

RE-S-1800x4RE-MX2000-1800X4Control Board and

See MX Series Interface

Xcvr

Module Reference

• MX2020 Router Overview on page 3

• MX Series Router Interface Names

• MX2020 Port and Interface Numbering on page 79

“RE-MX2000-1800x4 CB-RE
Description” on page 61

“Installing an SFP or XFP
Transceiver into an MX2020 MPC
or MIC” on page 333

19Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Copyright © 2015, Juniper Networks, Inc.20

CHAPTER 3

Chassis Components and Descriptions

•

MX2020 Chassis Description on page 21

•

MX2020 Backplane Description on page 27

•

MX2020 Component Redundancy on page 28

•

MX2020 Field-Replaceable Units on page 32

•

MX2020 Router Hardware Components and CLI Terminology on page 33

MX2020 Chassis Description

The router chassis is a rigid sheet metal structure that houses all the other router
components, (see Figure 1 on page 6, Figure 2 on page 8, and Figure 3 on page 9). The
chassis installs in a standard 19-in. four-post rack or enclosed cabinet.

NOTE: There must be a minimum of 45-U of usable rackspace when installing

the MX2020 router into a 45-U rack.

NOTE: If you are installing the MX2020 router into a network cabinet, make

sure that no hardware, device, rack,or cabinet component obstructs the 45-U
rack space from access during installation.

There are two types of chassis configurations available for the MX2020:

•

The chassis with standard cable managers and EMI coversmeasures78.75 in. (200 cm)
high, 19 in. (48.26 cm) wide, and 36.20 in. (91.95 cm) deep.

•

The chassis with extended cable managers and extended EMI covers measures

78.75 in. (200 cm) high, 19 in. (48.26 cm) wide, and 38.67 in. (98.2 cm) deep.

CAUTION: Before removing or installing components, attach an ESD strap

to an ESD point, and place the other end of the strap around your bare wrist.
Failure to use an ESD strap could result in damage to the hardware
components.

21Copyright © 2015, Juniper Networks, Inc.

g007102

RE0

RE1

MASTER

ONLINE

OFFLINE

PSM

1
2

3
4

5
6

7
8

0

10
11

12
13

14
15

16
17

9

MX2200

LC

CB-RE

LC

SFB

10

0

0

11

0

1

12

1

2

13

2

3

14

3

4

15

4

5

16

5

6

17

6

7

18

7

8

19

1

9

LC

CB-RE

LC

SFB

1

4

3

2

MX2020 3D Universal Edge Router Hardware Guide

WARNING: The router must be connected to earth ground during normal

operation.

NOTE: One router can be installed in a 45-U four-post rack if the rack can

support the combined weight, which can be greaterthan 1,500 lb (680.39 kg).

Mounting hardware includes built-in front-mounting flanges on the front of the chassis,
and one large shelf attached to a four-post rack or cabinet to support the chassis.

Figure 9: Front View of a Fully Configured MX2020 Router Chassis

Remove field replacement units (FRUs) from the front of the MX2020 router before you
install the router. See Table 3 on page 6 for information on MX2020 router components.

Table 9: Front Components in a Fully Configured MX2020 Router

Component

1

DescriptionComponent No.

2

manager– (standard
or extended)

MICs (top)

Copyright © 2015, Juniper Networks, Inc.22

Number of FRUsSlots

1–Upper cable

1010 through 19 (top)MPCs with ADCs and

Chapter 3: Chassis Components and Descriptions

Table 9: Front Components in a Fully Configured MX2020
Router (continued)

Component
DescriptionComponent No.

Number of FRUsSlots

3

(SFBs)

4

filter

5

Routing Engine
(CB-RE)

6

MICs (bottom)

7

manager– (standard
or extended)

80 through 7Switch Fabric Boards

1–Middle card cage air

20 and 1Control Board and

100 through 9MPCs with ADCs and

1–Lower cable

NOTE: A combination middle cable manager and air filter is installed over

the middle card cage.

23Copyright © 2015, Juniper Networks, Inc.

D

g007081

1

10

2

3

4

5

6

7

8

9

11

MX2020 3D Universal Edge Router Hardware Guide

Figure 10: Rear View of a Fully Configured AC-Powered MX2020 Router
Chassis

Remove field replacement units (FRUs) from the rear of the MX2020 router before you
install the router. See Table 4 on page 8 for information on MX2020 router components.

Table 10: Rear Components in a Fully Configured AC-Powered MX2020
Router

Component
No.

2

Component
Description

Upper fan trays (two)1

delta or wye

Number of FRUsSlots

2Fan tray 2 and fan tray 3

(behind cage door)

1PDM3/Input1AC PDM—Three-phase

99 through 17AC PSM3

1–PSM air filter4

Copyright © 2015, Juniper Networks, Inc.24

g007103

2

1

3

6

7

10

12

4

5

8

9

11

Chapter 3: Chassis Components and Descriptions

Table 10: Rear Components in a Fully Configured AC-Powered MX2020
Router (continued)

Component
No.

5

6

9

Component
Description

delta or wye

delta or wye

delta or wye

Lower fan trays (two)11

Number of FRUsSlots

1PDM2/Input0AC PDM—Three-phase

1PDM1/Input1AC PDM—Three-phase

90 through 8AC PSM7

1–PSM air filter8

1PDM0/Input0AC PDM)—Three-phase

1–Fan tray air filter10

2Fan tray 0 and fan tray 1

(behind access door)

Figure 11: Rear View of a Fully Configured DC-Powered MX2020 Router
Chassis

25Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Remove field replacement units (FRUs) from the rear of the MX2020 router before you
install the router. See Table 5 on page 10 for information on MX2020 router components.

Table 11: Rear Components in a Fully Configured DC-Powered MX2020
Router

Component
No.

10

Component
Description

Upper fan trays (two)1

manager–(standard or
extended)

Number of FRUsSlots

2Fan tray 2 and fan tray 3

(behind cage door)

1PDM3/Input1DC PDM2

99 through 17DC PSM3

1–PSM air filter4

1PDM2/Input0DC PDM5

1PDM1/Input1DC PDM6

90 through 8DC PSM7

1–PSM air filter8

1PDM0/Input0DC PDM9

4–DC cable

1–Fan tray air filter11

Lower fan tray (two)12

(behind access door)

2Fan tray 0 and fan tray 1

The MX2020 router has four electrostatic discharge (ESD) points. Two are located on
either side of the upper MPCs on the front of the chassis. A second pair is located on
either side of the lower MPCs on the front of the chassis (see Figure 4 on page 11).

Copyright © 2015, Juniper Networks, Inc.26

Figure 12: MX2020 Router ESD Points

10

11

12

13

14

15

16

17

18

19

RE0

RE1
MASTER

ONLINE

OFFLINE

PSM

1

2

3

4
5

6

7

8

0

10

11
12

13
14

15

16

17

9

MX2200

LC

CB-RE

LC

SFB

10

0

0

11

0

1

12

1

2

13

2

3

14

3

4

15

4

5

16

5

6

17

6

7

18

7

8

19

1

9

LC

CB-RE

LC

SFB

g007056

ESD

points

Chapter 3: Chassis Components and Descriptions

Related

Documentation

MX2020 Physical Specifications on page 108•

• Installing the MX2020 Mounting Hardware for a Four-Post Rack or Cabinet on page 205

• MX2020 Router Grounding Specifications on page 117

• MX2020 Chassis Moving Guidelines on page 107

MX2020 Backplane Description

Backplanes are located toward the rear of the chassis and form the rear of the card cage.
They consist of one upper signal and power backplane located at the top of the chassis,

27Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

and one lower signal and power backplane located at the bottom of the chassis. The
Switch Fabric Boards (SFBs) connect both upper and lower backplanes. The adapter
cards (ADCs) are carrier cards used to house the MPCs. The MPCs install into the top
and bottom card cage backplanes from the front of the chassis and mate to the signal
backplanes. The SFBs and CB-REs install into the middle from the front of the chassis.
The PSMs and PDMs install into the top and bottom power backplanes from the rear of
the chassis. The cooling system components also connect to the top and bottom
backplanes.

The backplane performs the following major functions:

•

Data path—Data packets are transferred across the backplane between the MPCs
through the fabric ASICs on the SFBs.

•

Power distribution—The router PDMs relay power from the feeds to the input of the
PSMs through the power midplane. In addition, the output power from PSMs is
distributed to the components of the chassis (MPCs, SFBs, and CB-REs), using the
power backplane.

•

Control/Management path—The backplane provides management and control path
connectivity among the various system components.

Related

Documentation

MX2020 Router Overview on page 3•

• MX2020 Chassis Description on page 5

• MX2020 Modular Port Concentrator Description on page 68

• MX2020 Switch Fabric Board Description on page 64

• MX2020 Host Subsystem Description on page 57

• MX2020 Modular Interface Card Description on page 73

• MX2020 Power Subsystem Description on page 83

• MX2020 Power Midplane Description on page 85

MX2020 Component Redundancy

A fully configured router is designed so that no single point of failure can cause the entire
system to fail. Only a fully configured router provides complete redundancy. All other
configurations provide partial redundancy. The following major hardware components
are redundant:

•

Host subsystem—The host subsystem consists of a combined Control Board and
Routing Engine (CB-RE) functioning together. The router can have one or two host
subsystems. If two host subsystems are installed, one functions as the master and the
other functions as the backup. If the master host subsystem (or either of its
components) fails, the backup can take over as the master.

•

DC power subsystem—The MX2020 DC power system is made up of two subsystems.
Each subsystem provides power to ten line card slots, one local fan tray and critical
FRUs. These critical FRUs consist of two CB-REs, eight SFBs located in the center of

Copyright © 2015, Juniper Networks, Inc.28

g007088

Available power

20 KW

Power

zone 1

LC 10-19
fan tray 3

Available power: 14.5 KW

Available power: 5.5 KW from zone 1
Available power: 5.5 KW from zone 0

Available power

20 KW

Power

zone 0

LC 0-9

fan tray 1

Available power: 14.5 KW

SFB 0-7, CB0,

CB1, fan tray 0,

fan tray 2

g007087

PDM 0

(feed A)

PDM 1

(feed B)

PSM

0

PSM

1

PSM

8

Chapter 3: Chassis Components and Descriptions

the chassis, and two fan trays (one for each zone). Specifically, each power subsystem
has enough power delivery capacity to power ten line card slots, three fan trays, two
CB-REs, and eight SFBs. There are nine DC power supply modules (PSMs), and two
DC power distribution modules (PDMs) in each subsystem. This means, if one power
subsystem stops functioning for any reason, only the MPCs will stop functioning, but
the router will continue functioning, (see Figure 5 on page 13).

Figure 13: Power Distribution from Each Power Subsystem to the FRUs

•

DC power feed redundancy—The MX2020 router subsystem is feed redundant. Each
PSM can be connected to two separate feeds from different sources that are used to
provide feed redundancy. There are two PDMs per power subsystem that carry nine
feeds each. Users should connect feeds from one power source to one PDM and feeds
from the other power source to the second PDM of the power subsystem, (see

Figure 6 on page 13).

Figure 14: DC Power Subsystem Feed Redundancy

Each PSM has a set of two DIP switches located on the faceplate. These DIP switches
are used to indicate whether a user wants to connect one feed to the power subsystem,
two feeds, or none. These DIP switches provide critical information to the power
management subsystem to help generate alarms in case of a feed failure or a wrong
connection. Each PDM has an LED per feed indicating whether the feed is active or not,
or whether the feed is connected properly. See “MX2020 DC Power Supply Module

Description” on page 96.

•

AC power subsystem—The MX2020 supports connection of a three-phase AC power
system. There are two types of three-phase power systems: the three-phase delta

29Copyright © 2015, Juniper Networks, Inc.

g007085

AC PS_0

2800W

input

AC PS_3

2800W

input

AC PS_1

2800W

input

AC PS_4

2800W

input

AC PS_2

2800W

input

AC PS_5

2800W

input

A1

B1

AC PS_8

2800W

input

A2

B2

C2

AC PS_6

2800W

input

AC PS_7

2800W

input

C1

g007086

AC PS_0

2800W

input

AC PS_3

2800W

input

AC PS_2

2800W

input

AC PS_5

2800W

input

A1

B1

C1

AC PS_1

2800W

input

AC PS_4

2800W

input

NE1

C2

NE2

AC PS_6

2800W

input

A2

B2

AC PS_7

2800W

input

AC PS_8

2800W

input

MX2020 3D Universal Edge Router Hardware Guide

and three-phase wye. The AC power going to the PSMs is split into three individual
phases—each PSM works on a single phase. This means the power system works
independent of the kind of AC feed is connected. The user can connect one or two
feeds, depending on the power system configuration (number of PSMs, redundancy,
etc.). Each phase from each of the two feeds is distributed among one or two PSMs
(one feed has each phase going to two PSMs, and the other feed has each phase going
to a single PSM). See Figure 7 on page 14 and Figure 8 on page 14.

Figure 15: Power Distribution from Three-Phase Feed Delta PDM to the
AC PSMs

Figure 16: Power Distribution from Three-Phase Feed Wye PDM to the AC
PSMs

The AC power subsystem is feed redundant, each PSM takes in two AC feeds and uses
one of the two. One AC feed is active at a time. If one feed fails, the PSM automatically
switches over to the other feed without disrupting system function, (see “MX2020

Three-Phase Delta AC Power Distribution Module Description” on page 86, “MX2020
Three-PhaseWyeAC PowerDistribution Module Description” on page 88, and “MX2020
AC Power Supply Module Description” on page 158).

Copyright © 2015, Juniper Networks, Inc.30

Chapter 3: Chassis Components and Descriptions

•

AC power requirements—Table 6 on page 15 shows the MX2020 current requirements
for the three–phase delta and wye power feeds.

Table 12: AC PDM Delta and Wye Current Requirements

Three–Phase
Voltage

(minimum–nominal)
(line-to-line) for delta
(per phase)

(minimum–nominal)
(line-to-neutral) for
wye (per phase)

Current Delta per
Three-Phase PDMInput Feed

Current Wye per
Three-Phase PDM

–50 A1200 V

–25 A2

30 A–1200 V

15 A–2

NOTE: This is the minimum required to provide 2.5KW per PSM. Based on

facilitiesguidelines, you should over-provision the MX2020 router. The two
numbers listed in the current columns reflect the distribution of phases
from the feed to PSM. For example, from one feed each phase goes to two
PSMs and from other feed each phase goes to only one PSM.

•

PDMs—In the DC configuration, each subsystem provides N+1 PSM redundancy along
with N+N feed redundancy. The power feeds from different sources need to be
connected to different PDMs. If feeds that connect to one PDM fail in a redundant
configuration, the other feed kicks in to provide full power. A total of four PDMs can be
installed into a router. Each DC PDM operates with up to nine separate feeds of either
60 A or 80 A current limit. The capacity of these feeds is relayed to system software
through a switch located on the DC PDM. The MX2020 router supports two types of
three-phase power system PDMs. The three-phase delta and three-phase wye.
Individual phases are taken from three-phase feeds to individual PSMs. One AC feed
provides power to six PSMs, while the second input feed provides power to the
remaining three PSMs (supporting a total of nine PSMs).

•

PSMs—All AC or DC PSMs in a subsystem share the load (the nine PSMs on the top
half share the load, as well as the nine PSMs on the bottom share the load). If one PSM
fails in a redundant configuration, the remaining PSMs provide power to FRUs. In the
AC or DC configuration, up to eighteen PSMs may be required to supply power to a
fully configured router. Nine PSMs in the lower card cage supply power to the two
CB-REs (active and redundant), eight SFBs, lower ten MPCs, two lower fan trays and
one fan tray on the top half. Nine PSMs in the upper card cage supply power to the two
upper fan trays, upper ten MPCs, two CB-REs (active and redundant), eight SFBs, and
a fan tray in the lower card cage. A portion of power from each zone is reserved to
power critical FRUs. These FRUs allow the system to operate even if power to a
complete zone fails.

•

Cooling system—The cooling system has a total of four fan trays— two per zone—which
are controlled by the host subsystem. Each zone is made up of a set of ten MPCs, four

31Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

SFBs, and one CB-RE, (see “MX2020 Cooling System Description” on page 53). If one
of the fans fails, the host subsystem increases the speed of the remaining fans to
provide sufficient, cooling for the router. The fan trays are powered by two power
subsystems that are divided into zones (upper zone 1 and lower zone 0).

Related

Documentation

MX2020 Router Overview on page 3•

• Displaying MX2020 Router Components and Serial Numbers

• Guidelines for Packing Router Components for Shipment on page 409

• Returning a Hardware Component to Juniper Networks, Inc. on page 412

MX2020 Field-Replaceable Units

Field-replaceable units (FRUs) are router components that can be replaced at the
customer site (see Table 7 on page 17). Replacing most FRUs requires minimal router
downtime. The router uses the following types of FRUs:

•

Hot-removable and hot-insertable FRUs—You can remove and replace these
components without powering off the router or disrupting the routing functions.

•

Hot-pluggableFRUs—Youcan remove and replacethese components without powering
off the router, but the routing functions of the system are interrupted when the
component is removed.

NOTE: Before you replace most host subsystem components, such as the

Control Board and Routing Engine (CB-RE), you must take the host
subsystem offline.

Table 7 on page 17 lists the FRUs for the MX2020 router.

Copyright © 2015, Juniper Networks, Inc.32

Table 13: Field-Replaceable Units

Chapter 3: Chassis Components and Descriptions

Hot-Pluggable FRUsHot-Removable and Hot-Insertable FRUs

Related

Documentation

•

PSM air filters

•

Air filter (lower)

•

Standard upper cable manager

•

Standard lower cable manager

•

Standard DC cable manager

•

Extended upper cable manager (optional)

•

Extended lower cable manager (optional)

•

Extended DC cable manager (optional)

•

Craft interface

•

Switch Fabric Board (SFB) (if redundant)

•

Backup CB-RE (if redundant)

•

Master CB-RE (if nonstop active routing is

•

Control Board and Routing
Engine (CB-RE) (nonredundant)

•

Switch Fabric Board (SFB)
(nonredundant)

configured)

•

Modular Port Concentrators (MPCs)

•

Adapter cards (ADCs)

•

Modular Interface Cards (MICs)

•

AC power supply modules (if redundant)

•

AC power distribution modules (if redundant)

•

DC power supply modules (if redundant)

•

DC power distribution modules (if redundant)

•

Fan trays

Taking an MX2020 Host Subsystem Offline on page 401•

• Tools and Parts Required for Replacing MX2020 Hardware Components on page 416

• Replacing the MX2020 Cable Managers on page 437

• Replacing the MX2020 Craft Interface on page 450

• Replacing an MX2020 Fan Tray on page 471

• Replacing the MX2020 Air Filters on page 431

MX2020 Router Hardware Components and CLI Terminology

The MX2020 router supports the components in Table 8 on page 17.

Table 14: MX2020 Router Hardware Components and CLI Terminology

DescriptionCLI NameHardware Model NumberComponent

MX2020CHAS-BP-MX2020Chassis

“MX2020 Physical Specifications”
on page 108

“MX2020 Chassis Description” on
page 5

33Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Table 14: MX2020 Router Hardware Components and CLI Terminology (continued)

DescriptionCLI NameHardware Model NumberComponent

MX2020-PREMIUM2-ACAC Optimized Power

Chassis

MX2020-PREMIUM2-DCDC Optimized Power

Chassis

MX2K-FPD-KIT-SExtended craft interface

panel

Cooling system, including air baffle, fan trays, and air filters

Tray

Power System Components

module (PDM)

Front Panel DisplayMX2020-CRAFTCraft interface panel

“MX2020 Craft Interface
Description” on page 37

“MX2020 Craft Interface
Description” on page 37

“MX2020 Cooling System
Description” on page 53

172mm FanTray - 6 FansMX2000-FANTRAYFan tray

Optimized Power fan trayMX2K-FANTRAYOptimized Power Fan

N/AMX2000-UPR-BAFFLEAir baffle

N/AMX2020-FLTR-KIT-SAir filter kit

“MX2020 Power Subsystem
Description” on page 83

N/AMX2000-PDM-BLANKPDM blank cover

“MX2020 DC Power Distribution
Module Description” on page 94

DC 52V Power Dist ModuleMX2000-PDM-DCPower distribution

AC Delta PowerDist ModuleMX2000-PDM-AC-DELTA

“MX2020 Three-Phase Delta AC
Power Distribution Module
Description” on page 86

MX2K-PDM-OP-DC

AC Y Power Dist ModuleMX2000-PDM-AC-WYE

Single-phase AC PDMMX2K-PDM-AC-1PH

Single-phaseACPDM (6+1)MX2K-PDM-OP-AC

Optimized Power DC PDM
(6+1)

“MX2020 Three-Phase Wye AC
Power Distribution Module
Description” on page 88

Copyright © 2015, Juniper Networks, Inc.34

Chapter 3: Chassis Components and Descriptions

Table 14: MX2020 Router Hardware Components and CLI Terminology (continued)

DescriptionCLI NameHardware Model NumberComponent

(PSM)

MIC

MPC

Routing Engine (CB-RE)

N/AMX2000-PSM-BLANKPSM blank cover

MX2000-PSM-ACPower supply module

MX2000-PSM-DC

AC 52V Power Supply
Module

DC 52V Power Supply
Module

See MX Series Interface Module Reference

N/AMX2000-LC-BLANKMPC blank cover

See MX Series Interface Module Reference

Adapter CardMX2000-LC-ADAPTERADC

N/AMX2000-RE-SFB-BLANKSFB blank cover

Switch Fabric BoardMX2000-SFBSFB

N/AMX2000-RE-SFB-BLANKCB-RE blank cover

Control BoardRE-MX2000-1800X4Control Board and

“MX2020 Power Subsystem
Description” on page 83

“MX2020 Modular Interface Card
Description” on page 73

“MX2020 Modular Port
Concentrator Description” on
page 68

“MX2020 Adapter Card (ADC)
Description” on page 67

“MX2020 Switch Fabric Board
Description” on page 64

“MX2020 CB-RE Description” on
page 59

Routing Engine (CB-RE)

Transceiver

Related

Documentation

RE-S-1800x4RE-MX2000-1800X4Control Board and

See MX Series Interface

Xcvr

Module Reference

• MX2020 Router Overview on page 3

• MX Series Router Interface Names

• MX2020 Port and Interface Numbering on page 79

“RE-MX2000-1800x4 CB-RE
Description” on page 61

“Installing an SFP or XFP
Transceiver into an MX2020 MPC
or MIC” on page 333

35Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Copyright © 2015, Juniper Networks, Inc.36

CHAPTER 4

RE0

RE1

MASTER

ONLINE

OFFLINE

M/S CHASSISNUM

PSM

1 2 3 4 5 6 7 8

0

10 11 12 13 14 15 16 17

9

MX2020

LC

CB-RE

LC

SFB

10

0

0

11

0

1

12

1

2

13

2

3

14

3

4

15

4

5

16

5

6

17

6

7

18

7

8

19

1

9

LC

CB-RE

LC

SFB

g007002

1

2 3 4 5 6 7 8

11

9

10

12

Alarm and Display Components

•

MX2020 Craft Interface Description on page 37

•

MX2020 Component LEDs on the Craft Interface on page 39

•

MX2020 Alarm Relay Contacts on the Craft Interface on page 41

•

MX2020 Alarm LEDs and Alarm Cutoff/Lamp Test Button on page 42

MX2020 Craft Interface Description

The craft interface allows the user to view status and troubleshooting information at a
glance and to perform many system control functions. It is hot-insertable and
hot-removable.

An extended craft interface is also available for use with the extended cable manager.
The extended craft interface functions the same as the standard craft interface but
provides additional clearance for maintenance on the extended cable manager.

The craft interface is located on the front of the router above the upper fan tray and
contains LEDs for the router components, the alarm relay contacts, and alarm cutoff
button. Table 15 on page 38 describes the LEDs, buttons, and connectors.

Figure 17: Front Panel of the Craft Interface

37Copyright © 2015, Juniper Networks, Inc.

0

g000418

MX2020 3D Universal Edge Router Hardware Guide

Figure 18: Extended Craft Interface

Table 15: Craft Interface LEDs, Buttons, and Connectors

DescriptionLabelFunction No.

Status LEDs for PSMs 0 through 8 and 9 through 17PSM1

Status LEDs for fan trays 0 through 3FANTRAYS2

3

RE0 (MASTER, ONLINE, and
OFFLINE)

RE1 (MASTER, ONLINE, and
OFFLINE)

MINOR ALARM4

Two sets of status LEDs per host subsystem. There
are three LEDs per Routing Engine.

Minor Alarm LED for monitoring or maintaining the
MX2020

MAJOR ALARM5

Major Alarm LED for critical conditions, that can
result in system shutdown

ACO/LT6

Alarm Cutoff/ Lamp Test Button. Turns off both
minor and major alarms and deactivates the device
attached to the corresponding alarm relay contact
on the craft interface

M/S CHASSIS NUM7

Chassis ID and Standalone Dial. These two dials are
used. One dial is used to indicate the chassis number
for multi-chassis configurations. The second dial is
used to indicate whether the chassis is operating in
standalone mode or as part of a multi-chassis
system.

8

MINOR ALARM–[NC C NO]

Two sets of alarm terminal contacts. Each consisting
of normal open and normal closed relays that signal

MAJOR ALARM–[NC C NO]

a minor or major alarm when broken.

LC 10 through LC 199

Online and Offline buttons located next to each line
card allows you to take individual line cards offline
or online.

Status LEDs for the upper ten line cards.

Copyright © 2015, Juniper Networks, Inc.38

Chapter 4: Alarm and Display Components

Table 15: Craft Interface LEDs, Buttons, and Connectors (continued)

DescriptionLabelFunction No.

CB-RE 0 and CB-RE 110

LC 0 through LC 911

SFB 0 through SFB 712

Related

Documentation

• Replacing the MX2020 Craft Interface on page 450

• MX2020 Craft Interface Serial Number Label

MX2020 Component LEDs on the Craft Interface

•

MX2020 Host Subsystem LEDs and Buttons on the Craft Interface on page 39

•

MX2020 Power Supply Module LEDs on the Craft Interface on page 40

•

MX2020 Line Card LEDs and Buttons on the Craft Interface on page 40

•

MX2020 SFB LED and Buttons on the Craft Interface on page 40

•

MX2020 Fan Tray LEDs on the Craft Interface on page 41

Online and Offline buttons located next to each
Control Board and Routing Engine (CB-RE) allows
you to take individual CB-REs offline or online.

Status LEDs for the two CB-REs cards.

Online and Offline buttons located next to each line
card allows you to take individual line cards offline
or online.

Status LEDs for the lower ten line cards.

Online and Offline buttons located next to each SFB
allows you to take individual SFBs offline or online.

Status LEDs for eight SFBs.

MX2020 Host Subsystem LEDs and Buttons on the Craft Interface

Each host subsystem has three LEDs, located in the upper middle of the craft interface,
that indicate its status. The LEDs labeled RE0 show the status of the Routing Engine on
the CB-RE in slot 0. The LEDs labeled RE1 show the status of the Routing Engine on the
CB-RE in slot 1. Table 16 on page 39 describes the functions of the host subsystem LEDs.

Table 16: Host Subsystem LEDs on the Craft Interface

DescriptionStateColorLabel

Host is functioning as the master.On steadilyGreenMASTER

Host is online and is functioning normally.On steadilyGreenONLINE

On steadilyRedOFFLINE

Host is installedbut the Routing Engine on the CB-RE
is offline.

Host is not installed.Off–

39Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

When placing the CB-RE offline, the Routing Engine goes offline. The Routing Engine gets
powered by the Control Board.

MX2020 Power Supply Module LEDs on the Craft Interface

Each power supply module (PSM) has one bicolor LED on the craft interfacethat indicates
its status. The LEDs, labeled 0 through 8 (bottom) and 9 through 17 (top), are located
on the upper left of the craft interface next to the PSM label. Table 17 on page 40 describes
the functions of the PSM LEDs on the craft interface.

Table 17: Power Supply Module LEDs on the Craft Interface

DescriptionStateColorLabel

PSM is functioning normally.On steadilyGreenPSM

PSM module has failed or power input has failed.On steadilyRed

MX2020 Line Card LEDs and Buttons on the Craft Interface

Each line card (MPC) has one bicolor LED on the craft interface that indicates its status.
The LEDs, labeled 0 through 9 (bottom) and 10 through 19 (top), are located along the
bottom of the craft interface. Table 18 on page 40 describes the functions of the LEDs.

Table 18: Line Card LEDs on the Craft Interface

DescriptionStateColorLabel

Line card functioning normally.On steadilyGreenOK

Line card is transitioning online or offline.Blinking

The slot is not online.Off–

Line card has failed.On steadilyRedFAIL

There are twenty push buttons located next to each of the line cards on the craft interface.
These buttons are used to place the line cards online or offline. When a line card is inserted
into an ADC, and installed into the MX2020 router the online/offline buttons can turn
both cards on or off.

NOTE: When installing an ADC without the line card, the online/offline

buttons will have no affect.

MX2020 SFB LED and Buttons on the Craft Interface

Each SFB has one tricolor LED on the craft interface that indicates its status. The SFB
LED, labeled 0 through 7, are located along the bottom of the craft interface.

Table 19 on page 41 describes the functions of the SFB LED.

Copyright © 2015, Juniper Networks, Inc.40

Table 19: SFB LED on the Craft Interface

There are eight push buttons located next to each of the SFBs on the craft interface.
These buttons are used to place the SFBs online or offline.

MX2020 Fan Tray LEDs on the Craft Interface

The fan tray LEDs, labeled 0 through 3, are located on the top middle of the craft interface.

Table 20 on page 41 describes the functions of the fan tray LEDs.

Chapter 4: Alarm and Display Components

DescriptionStateColorLabel

SFB functioning normally.On steadilyGreenOK

SFB is transitioning online or offline.Blinking

The slot is not online.Off–

SFB has failed.On steadilyRedFAIL

Table 20: Fan Tray LEDs on the Craft Interface

DescriptionStateColorLabel

Fan is functioning normally.On steadilyGreenFAN TRAY

Fan in a Fan Tray has failed.

Fan Tray has failed.

Related

Documentation

On steadilyRed

MX2020 Craft Interface Description on page 37•

• MX2020 Alarm Relay Contacts on the Craft Interface on page 41

MX2020 Alarm Relay Contacts on the Craft Interface

The craft interface has two alarm relay contacts for connecting the router to external
alarm devices. (see Figure 19 on page 42) Whenever a system condition triggers either
the red or yellow alarm on the craft interface, the alarm relay contacts are also activated.
The alarm relay contacts are located on the upper right of the craft interface (see

Table 21 on page 42).

41Copyright © 2015, Juniper Networks, Inc.

M/S CHASSIS NUM

17

6

7

18

7

8

19

1

9

LC

CB-RE

LC

SFB

g007006

1

MX2020 3D Universal Edge Router Hardware Guide

Figure 19: Alarm Relay Contacts

Table 21: Alarm Relay Contacts

DescriptionLabelFunction No.

1

MINOR ALARM–[NC C NO]

MAJOR ALARM–[NC C NO]

Related

Documentation

Disconnecting the Alarm Relay Wires from the MX2020 Craft Interface on page 283•

• Connecting the Alarm Relay Wires to the MX2020 Craft Interface on page 282

MX2020 Alarm LEDs and Alarm Cutoff/Lamp Test Button

Two large alarm LEDs are located at the upper right of the craft interface. When lit, the
circular red LED indicates a critical condition that can result in a system shutdown. A lit
triangular yellow LED indicates a less severe condition that requires monitoring or
maintenance. Both LEDs can be lit simultaneously.

A condition that causes an LED to light also activates the corresponding alarm relay
contact on the craft interface.

To deactivate red and yellow alarms, press the button labeled ACO/LT (for “alarm
cutoff/lamp test”), which is located to the right of the alarm LEDs. Deactivating an alarm
turns off both LEDs and deactivates the device attached to the corresponding alarm
relay contact on the craft interface.

The alarm relays consist of three
terminal contacts with a normal
closed (NC), common (C), and
normal open (NO) relays that signal
a minor or major alarm when
broken.

Table 22 on page 43 describes the alarm LEDs and alarm cutoff button in more detail.

Copyright © 2015, Juniper Networks, Inc.42

Chapter 4: Alarm and Display Components

Table 22: Alarm LEDs and Alarm Cutoff/Lamp Test Button

DescriptionLED Control NameStateColorShape

Related

Documentation

Critical alarmOn steadilyRed

Warning alarmOn steadilyYellow

––

Alarm cutoff/lamp
test button

• MX2020 Craft Interface Description on page 37

• MX2020 Alarm Relay Contacts on the Craft Interface on page 41

• MX2020 Router Overview on page 3

Indicatesa critical condition
that can cause the router to
stop functioning. Possible
causes include component
removal, failure, or
overheating.

Indicates a serious but
nonfatal error condition,
such as a maintenance alert
or a significant increase in
component temperature.

Deactivates red and yellow
alarms. Causes all LEDs on
the craft interface to light
(for testing) when pressed
and held.

43Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Copyright © 2015, Juniper Networks, Inc.44

CHAPTER 5

Cable and Rack Management

•

MX2020 Cable Manager Description on page 45

•

MX2020 Rack-Mounting Hardware on page 50

MX2020 Cable Manager Description

The MX2020 consists of a standard or extended cable management system.

•

Standard Cable Management System on page 45

•

Extended Cable Management System on page 48

Standard Cable Management System

The standard cable management system consists of the following components:

•

Upper cable manager—MX2000-CBL-TOP-S

•

Middle cable manager and air filter—MX2000-CBL-MID-S

•

Lower cable manager—MX2000-CBL-BTM-S

•

DC cable manager—MX2020-DC-CBL-MGR-S

The upper cable manager, (see Figure 20 on page 46) is located just below the craft
interface, has a removable cover that is secured by two captive screws with access to
rows used for routing and securing the cables away from the front of the Modular Port
Concentrators (MPCs), and Modular Interface Cards (MICs). The lower cable manager
(see Figure 20 on page 46) is located just below the bottom line card cage, has a
removable cover that is secured by two captive screws with access to rows used for
routing and securing the cables away from the front of the MPCs, and MICs, (see

Figure 21 on page 47).

You can use cable strips or other ties to gently secure the cables in the upper and lower
cable manager. To secure the cables in place, loop the tie through the cable anchor and
secure the tie.

Each DC PDM has one cable manager. The DC cable manager routes cables away from
the rear of the PDMs (see Figure 20 on page 46).

You can use cable strips or other ties to gently secure the cables in the DC cable manager.
To secure the cables in place, loop the tie through the cable anchor and secure the tie.

45Copyright © 2015, Juniper Networks, Inc.

g007031

Front top

Front bottom

Rear DC Cable (for DC PDM)

MX2020 3D Universal Edge Router Hardware Guide

You can pull the DC cable manager up and outward to lock it into the maintenance
position.

Figure 20: MX2020 Standard Cable Managers

Copyright © 2015, Juniper Networks, Inc.46

g007034

LC

10

11

12 13 14 15 16 17 18 19

Chapter 5: Cable and Rack Management

Figure 21: Upper and Lower Cable Management

The middle card-cage cable manager, (see Figure 22 on page 48 and Figure 23 on page 48)
is a combination cable tray and air filter located in the middle card cage, which has rows
for routing and securing the cables away from the front of the CB-REs, and SFBs.

You can use cable strips or other ties to gently secure the cables in the middle cable
manager. To secure the cables in place, loop the tie through the cable anchor and secure
the tie. To access the air filter, the cable manager needs to be opened.

47Copyright © 2015, Juniper Networks, Inc.

g007076

19

0

OK/FAIL

OK/FAIL

OK/FAIL

OK/FAIL

OK/FAIL

OK/FAIL

OK/FAIL

OK/FAIL

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MX2020 3D Universal Edge Router Hardware Guide

Figure 22: Middle Card-Cage Cable Manager

Figure 23: Middle Card-Cage Air Filter

Extended Cable Management System

The extended cable management system consists of the following components:

•

Extended upper cable manager—MX2000-CBL-TOP-XT-S

•

Extended lower cable manager—MX2000-CBL-BTM-XT-S

•

Extended DC cable manager—MX2020-DC-CBL-MGR-XT-S

Copyright © 2015, Juniper Networks, Inc.48

g000010

Front upper

Front lower

Rear DC PDM

Chapter 5: Cable and Rack Management

The extended cable management system provides additional support to route and secure
a large number of cables away from the front of the MPCs, and MICs (see

Figure 24 on page 49).

The extended DC cable management system provides additional support to route and
secure a large number of cables away from the rear of the PDMs (see

Figure 24 on page 49).

You can use cable strips or other ties to gently secure the cables in the upper and lower
extended cable managers. To secure the cables in place, loop the tie through the cable
anchor and secure the tie.

Figure 24: MX2020 Extended Cable Managers

49Copyright © 2015, Juniper Networks, Inc.

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LC

10

11

12 13 14 15 16 17 18 19

MX2020 3D Universal Edge Router Hardware Guide

Figure 25: Upper and Lower Extended Cable Management

Related

Documentation

Installing the MX2020 Upper Cable Manager on page 332•

• Installing the MX2020 Lower Cable Manager on page 314

• Installing the MX2020 DC Cable Manager on page 303

• Replacing the MX2020 Cable Managers on page 437

MX2020 Rack-Mounting Hardware

The rack-mounting hardware for the MX2020 router includes:

•

The large adjustable mounting shelf for mounting in four-post racks or cabinets

•

Front-mounting flanges on the front of the chassis for front-mounting in a four-post
rack or cabinet

•

Mounting screws

NOTE: There must be a minimum of 45 U of usable rackspace when installing

the MX2020 router into a 45-U rack.

Related

Documentation

• MX2020 Chassis Description on page 5

• MX2020 Backplane Description on page 11

Copyright © 2015, Juniper Networks, Inc.50

Chapter 5: Cable and Rack Management

• Installing the MX2020 Mounting Hardware for a Four-Post Rack or Cabinet on page 205

51Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Copyright © 2015, Juniper Networks, Inc.52

CHAPTER 6

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Cooling System

•

MX2020 Cooling System Description on page 53

•

MX2020 Fan Tray LED on page 56

MX2020 Cooling System Description

The cooling system consists of the following components:

•

Fan tray—MX2000-FANTRAY

•

Lower Fan Tray Air filter—MX2020-FLTR-KIT-S

•

Air baffle—MX2000-UPR-BAFFLE

The cooling system components work together to keep all router components within the
acceptable temperature range. The router has four fan trays, two trays located at the
top, and two trays located at the bottom of the router that install horizontally. Each fan
tray contains six fans. These are labeled 1 through 6 and are 172-mm in diameter. The
fan trays are interchangeable and are hot-insertable and hot-removable.

Each fan tray has a double safety latch, so the fan tray cannot be removed in one swift
motion, (see Figure 26 on page 53).

Figure 26: Removing Fan Tray

53Copyright © 2015, Juniper Networks, Inc.

g007009

Lower fan trays

Upper Fan trays

Card cage

Power
supply
cooling

Card cage

Airflow divider

Card cage

MX2020 3D Universal Edge Router Hardware Guide

WARNING: Beforeremoving a fan tray,makesure the fan blades havestopped

completely.

The host subsystem monitors the temperature of the router components. When the
router is operating normally, the fans function at lower than full speed. If a fan fails or
the ambient temperature rises above a threshold, the speed of the remaining fans is
automatically adjusted to keep the temperature within the acceptable range, (see

Figure 27 on page 54).

Figure 27: Airflow Through the Chassis

The MX2020 router provides a two-stage front-to-back cooling system. Air is pushed
into the bottom inlet and up through the lower fan tray, and exits through the opening
between the backplanes in the center of the chassis. This cools the bottom MPCs, half
of the SFBs and CB-REs. Air is pulled through the SFBs and all the CB-REs in the center
of the chassis and is exhausted out the upper rear of the system.

Copyright © 2015, Juniper Networks, Inc.54

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1

2

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Chapter 6: Cooling System

The CB-REs and SFBs are equipped with an air divider to deflect the exhaust air from the
bottom half of the system out and direct the air to the top half MPCs.

Figure 28: Upper/Lower Fan Tray

Safety double latch system

2—1—

STATUS LED

WARNING: Beforeremoving a fan tray,makesure the fan blades havestopped

completely.

WARNING: The fan trays use a double latch safety mechanism. Press and

hold the latch until the STATUS LED turns off. Continue to press and hold the
latch while removing the fan trays.

Figure 29: Lower Fan Tray Air Filter

The air baffle is an optional component that can be purchased from Juniper Networks.

When installed over the upper fan tray access door, the air baffle dissipates exhausted
air away from the router.

Related

Documentation

• Troubleshooting the MX2020 Cooling System on page 534

• Maintaining the MX2020 Air Filter on page 341

• Maintaining the MX2020 Fan Trays on page 345

• Maintaining the MX2020 Air Baffle on page 344

55Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

MX2020 Fan Tray LED

Each fan tray (both the standard fan tray and optimized power fan tray) contains one
bicolor LED located on the front faceplate, (see Table 23 on page 56). A set of four bicolor
fan tray LEDs is located on the top middle of the craft interface. For more information,
see “MX2020 Component LEDs on the Craft Interface” on page 39.

Table 23: Fan Tray LEDs

DescriptionStateColorLabel

Fan tray is operating properly.OnGreenSTATUS

Fan tray is not receiving enough power to operate.OnYellow

Fan temperature may indicate warm threshold.

Fan tray is nonoperational.OnRed

Related

Documentation

One or more fans are bad or not operating.

Fan temperature may indicate high threshold.

• MX2020 Cooling System Description on page 53

• Maintaining the MX2020 Fan Trays on page 345

• Troubleshooting the MX2020 Cooling System on page 534

• MX2020 Component LEDs on the Craft Interface on page 39

Copyright © 2015, Juniper Networks, Inc.56

CHAPTER 7

Host Subsystem Components

•

MX2020 Host Subsystem Description on page 57

•

MX2020 CB-RE Description on page 59

•

RE-MX2000-1800x4 CB-RE Description on page 61

•

MX2020 CB-RE LEDs on page 62

•

MX2020 Switch Fabric Board Description on page 64

•

MX2020 Switch Fabric Board LED on page 65

MX2020 Host Subsystem Description

The host subsystem provides routing protocol processes, as well as software processes
that control the router’s interface, the chassis components, system management, and
user access to the router. These routing processes run on top of a kernel that interacts
with the Packet Forwarding Engine (PFE). The CB-RE provides control plane functions.
The user can install one or two host subsystems on the router. Each host subsystem
functions as a unit; the Control Board and Routing Engine (CB-RE).

NOTE: Install two CB-RE host subsystems for redundant protection. If you

install only one CB-RE host subsystem, you can install it in slot 0 or slot 1.

CAUTION: If one of the CB-REs fails, do not remove the failed CB-RE until

you have a replacement or blank panel to install.

57Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Supported CB-RE

The CB-RE is hot-pluggable. Some key attributes of the MX2020 CB-RE are:

•

CB-RE into one FRU.

•

Air diverter to isolate upper and lower cooling zones.

The MX2020 router supports the following CB-RE:

•

RE-MX2000-1800x4 supported for Junos OS Release 12.3R2 and later.

CB-RE Function

The CB-RE runs the Junos OS. Software processes that run on the CB-RE maintain the
routing tables, manage the routing protocols used on the router, control the router
interfaces, control some chassis components, and provide the interface for system
management and user access to the router.

CB-RE Slots

CB-RE Interface Ports

The user can install one or two CB-REs in the router. Each CB-RE is a combined Routing
Engine and Control Board in one unit. A USB port on the CB-RE accepts a USB memory
device that allows you to load Junos OS. The CB-RE installs into the front of the chassis
in vertical slots labeled 0 and 1. If two CB-REs are installed, one functions as the master
and the other acts as the backup. If the master CB-RE fails or is removed and the backup
is configured appropriately, the backup takes over as the master. If no CB-RE is installed
in a slot, install a blank panel in the slot.

A minimum of one CB-RE must be installed in either slot 0 or slot 1 at all times.

CAUTION: If one of the CB-REs fails, do not remove the failed CB-RE until

you have a replacement or blank panel to install.

Three ports, located on the CB-RE, connect the CB-RE to one or more external devices
on which system administrators can issue Junos OS command-line interface (CLI)
commands to manage the router. In addition, four ports located on the CB-RE include,
two 10 Gigabit Ethernet SFP+ interface connectors supporting hardware diagnostics
(JCS port testing), and two external clock interfaces for BITS and GPS function.

The CB-RE interface ports with the indicated labels function as follows:

•

AUX—Connects the CB-RE to a laptop, modem, or other auxiliary device through a

serial cable with an RJ-45 connector.

•

CONSOLE—Connects the CB-RE to a system console through a serial cable with an

RJ-45 connector.

Copyright © 2015, Juniper Networks, Inc.58

RESET

ONLINE
OFFLINE

AUX

MGMTCONSOLE

USB

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Chapter 7: Host Subsystem Components

•

MGMT—Connects the CB-RE through an Ethernet connection to a management LAN

(or any other device that plugs into an Ethernet connection) for out-of-band
management. The port uses an autosensing RJ-45 connector to support 10-Mbps or
100-Mbps connections. Two small LEDs on the bottom of the port indicate the
connection in use: the LED flashes yellow or green for a 10-Mbps or 100-Mbps
connection, and the LED is lit green when traffic is passing through the port.

The control board interface ports function as follows:

•

XGE-0 and XGE-1—Two SFP+ connects the CB-RE through an Ethernet to support 2 x

10-Gbps connections to any external control box. Two small LEDs on the side of each
SFP+ port indicate the connection in use: the LED flashes yellow when there is no link,
flashes green when there is activity, or is lit green for a 10-Gbps connection.

•

ExtClk-0 and ExtClk-1—Connect the CB-RE to an external clock device through a serial

cable with an RJ-45 connector.

Related

Documentation

MX2020 CB-RE LEDs on page 62•

• Maintaining the MX2020 Host Subsystem on page 370

• Taking an MX2020 Host Subsystem Offline on page 401

• Effect of Taking the MX2020 Host Subsystem Offline on page 402

• Removing an MX2020 CB-RE on page 419

• RJ-45 Connector Pinouts for MX Series CB-RE Auxiliary and Console Ports on page 145

• RJ-45 Connector Pinouts for an MX Series CB-RE Management Port on page 146

MX2020 CB-RE Description

Figure 30 on page 59 shows the Control Board and Routing Engine

(CB-RE)—RE-MX2000-1800x4.

Table 24 on page 59 describes the Control Board and Routing Engine

(CB-RE)—RE-MX2000-1800x4 ports.

Figure 30: RE-MX2000-1800x4 CB-RE Front View

Table 24: Components on the RE-MX2000-1800x4

DescriptionLabelFunction No.

AUX1

This port is used to connect a laptop,
modem, or other auxiliary unit.

59Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Table 24: Components on the RE-MX2000-1800x4 (continued)

DescriptionLabelFunction No.

CONSOLE2

This port is used to configure the
MX2020 router.

MGMT3

This port is a dedicated management
channel for device maintenance. It is
also used for system administrators to
monitor and manage the MX2020
router remotely.

USB4

This port is used to install a USB flash
drive that contains Junos OS.

Resetbutton used to reboot the CB-RE.RESET5

LINK6

These LEDs are associated with each
of the SFP+ ports (XGE-0 and XGE-1)
indicates the connection in use.

ExtClk-1 and ExtClk-27

Connects the CB-RE to two external
clock interfaces for BITS and GPS
function through a serial cable with an
RJ-45 connector.

GPS, and BITS8

There is one bicolor LED for each
externalclock interface—BITSand GPS.

XGE-0 and XGE-19

Two SFP+ ports connects the CB-RE
through an Ethernet connection to
support hardware diagnostics and JCS
port testing. The port uses an RJ-45
connector to support 2 x 10-Gbps
connections.

Related

Documentation

10

ONLINE, MASTER, and
OK/FAIL

There is one bicolor LED for each CB-RE
control. The ONLINE LED indicates that
the CB-RE is transitioning online and
functioning properly. The MASTER LED
indicates that this board is a master
Control Board and Routing Engine
(CB-RE) , and the OK/FAIL LED
indicates the CB-RE has failed.

• RJ-45 Connector Pinouts for MX Series CB-RE Auxiliary and Console Ports on page 145

• RJ-45 Connector Pinouts for an MX Series CB-RE Management Port on page 146

• Removing an MX2020 CB-RE on page 419

• MX2020 Host Subsystem Description on page 57

Copyright © 2015, Juniper Networks, Inc.60

RE-MX2000-1800x4 CB-RE Description

•

RE-MX2000-1800x4 CB-RE Components on page 61

•

RE-MX2000-1800x4 CB-RE Boot Sequence on page 62

RE-MX2000-1800x4 CB-RE Components

Each CB-RE consists of the following components:

•

External clock interface—Allows BITS or GPS clock source input to the centralized
timing circuit, or allows centralized timing to be output to BITS or GPS.

•

1000Base-T Ethernet controller

•

Circuits for chassis management and control.

•

Power circuits for the CB-RE.

•

Control FPGA—Provides the Peripheral Component Interconnect (PCI) interface to
the routing engine.

Chapter 7: Host Subsystem Components

•

Gigabit Ethernet switch that is connected to the embedded CPU complex on all
components.

•

CPU—Runs Junos OS to maintain the router's routing tables and routing protocols.

•

I2C bus logic, used for low-level communication with each component.

•

DRAM—Provides storage for the routing and forwarding tables and for other routing
engine processes.

•

Component redundancy circuitry.

•

USB port—Provides a removable media interface through which you can install the
Junos OS manually. Junos OS supports USB version 1.0.

•

CompactFlash card—Provides primary storagefor software images, configurationfiles,
and microcode. The CompactFlash card is fixed and is inaccessible from outside the
router.

•

Solid State Disk (non-removable)—Provides secondary storage for log files, memory
dumps, and rebooting the system if the CompactFlash card fails.

•

Interfaceports—The AUX, CONSOLE, and MGMT ports provide access to management
devices. Each CB-RE has one 10/100-Mbps Ethernet port for connecting to a
management network, and two asynchronous serial ports—one for connecting to a
console and one for connecting to a modem or other auxiliary device. The two SFP+
ports (XGE-0 and XGE-1) provide support for hardware diagnostics and JCS port testing.
The ExtClk ports provide access to external timing distribution.

•

EEPROM—Stores the serial number of the CB-RE.

•

Reset button—Reboots the Routing Engine on the CB-RE when pressed.

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MX2020 3D Universal Edge Router Hardware Guide

•

Online/Offline button—Takes the Routing Engine on the CB-RE online or offline when
pressed.

•

LEDs—Provide status of the Routing Engine on the CB-RE.

RE-MX2000-1800x4 CB-RE Boot Sequence

The router is shipped with the Junos OS preinstalled on the CB-RE. There are three copies
of software:

•

One copy on a USB flash drive that can be inserted into the slot on the CB-RE faceplate.

•

One copy on the CompactFlash card in the Routing Engine.

•

One copy on the Solid State Disk (SSD) in the CB-RE.

NOTE: The SSD is internal and cannot be removed.

The Routing Engine interface boots from the storage media in this order: the USB device
(if present), then the CompactFlash card, then the SSD, and then the LAN. Normally, the
router boots from the copy of the software on the CompactFlash card.

Related

Documentation

• RJ-45 Connector Pinouts for an MX Series CB-RE Management Port on page 146

• Removing an MX2020 CB-RE on page 419

• MX2020 Host Subsystem Description on page 57

MX2020 CB-RE LEDs

Each Routing Engine on the CB-RE (model number RE-MX2000-1800X4) has three LEDs
that indicate its status. The LEDs, labeled ONLINE, MASTER, OK/FAIL, are located directly
on the faceplate of the CB-RE. Table 25 on page 63 describes the functions of the Routing
Engine interface of the CB-RE. There are three LEDs on the craft interface for each Routing
Engine (RE0 and RE1). These LEDs are labeled MASTER, ONLINE, and OFFLINE.

The Control Board, part of the host subsystem, has a set of bicolor LEDs that display its
status. The LEDs, labeled LINK, GPS, BITS, and UTI are located directly on the faceplate
of the CB-RE. Table 25 on page 63 describes the functions of the Control Board interface
of the CB-RE. There are two LEDs on the craft interface for each Control Board–one
labeled CB-RE0 (far left) and one labeled CB-RE1 (far right). For more information about
the CB-RE and Routing Engine LEDs on the craft interface, see “MX2020 Component

LEDs on the Craft Interface” on page 39.

RJ-45 Connector Pinouts for MX Series CB-RE Auxiliary and Console Ports on page 145•

NOTE: The GPS LED will display when connecting to an external clocking

interface.

Copyright © 2015, Juniper Networks, Inc.62

Table 25: CB-RE LEDs

Chapter 7: Host Subsystem Components

DescriptionStateColorLabel

CB-RE is transitioning online.BlinkingGreenONLINE

CB-RE is functioning normally.On steadily

CB-RE is offline.Off—

CB-RE is the master.On steadilyBlueMASTER

CB-RE has failed.On steadilyRedOK/FAIL

SFP+ ports (XGE-0 and XGE-1) link connection.On steadilyGreenLINK

Activity on SFP+ ports (XGE-0 and XGE-1).Blinking

steadily

No link.OnYellow

Related

Documentation

BITS external clocking interface is active.On steadilyGreenBITS

BITS external clocking interface has failed.On steadilyYellow

BITS external clocking interface is offline.Off–

GPS external clocking interface is active.On steadilyGreenGPS

GPS external clocking interface has failed.On steadilyYellow

GPS external clocking interface is offline.Off–

MX2020 Host Subsystem Description on page 57•

• Maintaining the MX2020 Host Subsystem on page 370

• Taking an MX2020 Host Subsystem Offline on page 401

63Copyright © 2015, Juniper Networks, Inc.

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MX2020 3D Universal Edge Router Hardware Guide

MX2020 Switch Fabric Board Description

The MX2020 Switch Fabric Board (SFB) straddles the two backplanes. It has connectors
connecting to both backplanes, (see Figure 31 on page 64).

Figure 31: SFB

SFB Slots

The user can install up to eight SFBs in the MX2020 router. The SFBs install vertically
into the front of the chassis in the slots labeled 0 through 7. If any slots are empty, you
must install a blank panel.

CAUTION: If one of the SFBs fails, do not remove the failed SFB until you

have a replacement or blank panel to install.

SFB Redundancy

Sevenof eight SFBs are required for line rate operation. The system can continue operating
with fewer than seven SFBs, but forwarding performance will be impacted.

SFB Components

Each SFB consists of the following components:

•

PCIe control of three XF ASICs

•

I2C bus logic interface, used for component management and monitoring of
temperature, and voltage

Copyright © 2015, Juniper Networks, Inc.64

Chapter 7: Host Subsystem Components

•

Switch fabric—Provides the switching functions for the MPCs

•

Fabric capacity—Supports a 750-Gbps MPC with redundancy and 860-Gbps without
redundancy

•

Circuits for chassis management and control

•

Power circuits for the SFB

•

LED—Provide status of the SFB

Related

Documentation

MX2020 Host Subsystem Description on page 57•

• MX2020 Switch Fabric Board LED on page 65

• Replacing an MX2020 SFB on page 494

MX2020 Switch Fabric Board LED

One bicolor LED on the SFB indicate the status of the SFB. The LED, labeled OK/FAIL, is
located directly on the SFB. Table 26 on page 65 describes the functions of the SFB LED.

Table 26: Switch Fabric Board LED

GreenOK/FAIL

DescriptionStateColorLabel

SFB is online.Slow blinking when being

initialized.

Fast blinking when SFB is being
identified by software.

NOTE: This is used to guide the

operator to correct any action
needed on the SFB.

SFB has failed.On steadilyRed

Related

Documentation

SFB is offline.Off–

Each SFB also has a set of bicolor LED on the craft interface that indicate its status. The
SFB LED, labeled 0 through 7, are located along the bottom center of the craft interface.
For more information about the SFB LED on the craft interface,see “MX2020 Component

LEDs on the Craft Interface” on page 39.

• MX2020 Switch Fabric Board Description on page 64

• MX2020 Host Subsystem Description on page 57

• Replacing an MX2020 SFB on page 494

65Copyright © 2015, Juniper Networks, Inc.

MX2020 3D Universal Edge Router Hardware Guide

Copyright © 2015, Juniper Networks, Inc.66

CHAPTER 8

Interface Modules—ADCs, MPCs, and MICs

•

MX2020 Adapter Card (ADC) Description on page 67

•

MX2020 Modular Port Concentrator Description on page 68

•

MX2020 Modular Port Concentrator LEDs on page 70

•

MPCs Supported by MX240, MX480, MX960, MX2010, and MX2020 Routers on page 70

•

MX2020 MPC Terminology on page 73

•

MX2020 Modular Interface Card Description on page 73

•

MICs Supported by MX Series Routers on page 74

•

MX2020 Modular Interface Card LEDs on page 78

•

MX2020 Port and Interface Numbering on page 79

MX2020 Adapter Card (ADC) Description

The current MX2020 router requires an adapter card (ADC) to house the MPCs. The
MPCs attach to the ADCs which in turn attach to the backplane. Future MPCs for the
MX2020 can be used without an ADC.

The MX2020 router has 20 dedicated line card slots, which means a maximum of 20
ADCs can be installed. The dedicated slots are numbered 0 though 9 (bottom), and 10
though 19 (top), left to right. ADCs install vertically in the front of the router.

When a slot is not occupied by a combined ADC and MPC, the user must insert a blank
panel to fill the empty slot and ensure proper cooling of the system.

ADCs are hot-removable and hot-insertable. Figure 32 on page 68 shows a typical ADC
supported on the MX2020 router.

67Copyright © 2015, Juniper Networks, Inc.

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MX2020 3D Universal Edge Router Hardware Guide

Figure 32: Typical ADC Supported on the MX2020 Router

Related

Documentation

Removing an MX2020 MPC with Adapter Card on page 485•

• Maintaining the MX2020 Adapter Cards on page 338

MX2020 Modular Port Concentrator Description

The Modular Port Concentrators (MPCs) provides packet forwarding services. The MPCs
install into an adapter card (ADC) which in turn connects to the backplane. Modular
Interface Cards (MICs) provide the physical interfaces and install into the MPCs. The
user can install up to two MICs of different media types on the same MPC as long as the
MPC supports those MICs.

NOTE: The MX2020 router also supports fixed port MPCs.

MICs receive incoming packets from the network and transmit outgoing packets to the
network. During this process, each MIC performs framing and high-speed signaling for
its media type. Each MPC is equipped with up to four Junos Trio chipsets, which perform
control functions tailored to the MPC’s media type.

The MX2020 router supports up to 20 MPCs. For power requirements, see “Calculating

DC Power Requirements for MX2020 Routers” on page 180 and “Calculating AC Power
Requirements for MX2020 Routers” on page 165.

The router has 20 dedicated line card slots for MPCs. MPCs install vertically in the front
of the router. The dedicated slots are numbered 0 though 9 (bottom), and 10 though 19
(top), left to right. An MPC can be installed in any line card slot. The user can install any
combination of MPC types in the router.

Copyright © 2015, Juniper Networks, Inc.68