Juniper Networks MX240 User Manual

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MX240™ Ethernet Services Router

Hardware Guide

Juniper Networks, Inc.

1194 North Mathilda Avenue

Sunnyvale, California 94089

USA

408-745-2000

www.juniper.net

Part Number: 530-022140-01, Revision 2

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This product includes the Envoy SNMP Engine, developed by Epilogue Technology, an Integrated Systems Company. Copyright © 1986-1997, Epilogue Technology Corporation. All rights reserved. This program and its documentation were developed at private expense, and no part of them is in the public domain.

This product includes FreeBSD software developed by the University of California, Berkeley, and its contributors. All of the documentation and software included in the 4.4BSD and 4.4BSD-Lite Releases is copyrighted by the Regents of the University of California. Copyright © 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994. The Regents of the University of California. All rights reserved.

GateD software copyright © 1995, the Regents of the University. All rights reserved. Gate Daemon was originated and developed through release 3.0 by Cornell University and its collaborators. Gated is based on Kirton’s EGP, UC Berkeley’s routing daemon (routed), and DCN’s HELLO routing protocol. Development of Gated has been supported in part by the National Science Foundation. Portions of the GateD software copyright © 1988, Regents of the University of California. All rights reserved. Portions of the GateD software copyright © 1991, D. L. S. Associates.

Juniper Networks, the Juniper Networks logo, NetScreen, and ScreenOS are registered trademarks of Juniper Networks, Inc. in the United States and other countries. JUNOS and JUNOSe are trademarks of Juniper Networks, Inc. All other trademarks, service marks, registered trademarks, or registered service marks are the property of their respective owners.

Juniper Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the right to change, modify, transfer, or otherwise revise this publication without notice.

Products made or sold by Juniper Networks or components thereof might be covered by one or more of the following patents that are owned by or licensed to Juniper Networks: U.S. Patent Nos. 5,473,599, 5,905,725, 5,909,440, 6,192,051, 6,333,650, 6,359,479, 6,406,312, 6,429,706, 6,459,579, 6,493,347, 6,538,518, 6,538,899, 6,552,918, 6,567,902, 6,578,186, and 6,590,785.

MX240 Ethernet Services Router Hardware Guide

Writing: Elizabeth Gardner, Sheila Nolte Editing: Fran Mues Illustration: Faith Bradford Brown Cover Design: Edmonds Design

Revision History 29 February 2008—530-022140-01. Revision 2. 1 February 2008—530-022140-01. Revision 1.

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

YEAR 2000 NOTICE

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

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

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End User License Agreement

READ THIS END USER LICENSE AGREEMENT (“AGREEMENT”) BEFORE DOWNLOADING, INSTALLING, OR USING THE SOFTWARE. BY DOWNLOADING, INSTALLING, OR USING THE SOFTWARE OR OTHERWISE EXPRESSING YOUR AGREEMENT TO THE TERMS CONTAINED HEREIN, YOU (AS CUSTOMER OR IF YOU ARE NOT THE CUSTOMER, AS A REPRESENTATIVE/AGENT AUTHORIZED TO BIND THE CUSTOMER) CONSENT TO BE BOUND BY THIS AGREEMENT. IF YOU DO NOT OR CANNOT AGREE TO THE TERMS CONTAINED HEREIN, THEN (A) DO NOT DOWNLOAD, INSTALL, OR USE THE SOFTWARE, AND (B) YOU MAY CONTACT JUNIPER NETWORKS REGARDING LICENSE TERMS.

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3. License Grant. Subject to payment of the applicable fees and the limitations and restrictions set forth herein, Juniper grants to Customer a non-exclusive and non-transferable license, without right to sublicense, to use the Software, in executable form only, subject to the following use restrictions:

a. Customer shall use the Embedded Software solely as embedded in, and for execution on, Juniper equipment originally purchased by Customer from Juniper or an authorized Juniper reseller.

b. Customer shall use the Software on a single hardware chassis having a single processing unit, or as many chassis or processing units for which Customer has paid the applicable license fees; provided, however, with respect to the Steel-Belted Radius or Odyssey Access Client software only, Customer shall use such Software on a single computer containing a single physical random access memory space and containing any number of processors. Use of the Steel-Belted Radius software on multiple computers requires multiple licenses, regardless of whether such computers are physically contained on a single chassis.

c. Product purchase documents, paper or electronic user documentation, and/or the particular licenses purchased by Customer may specify limits to Customer’s use of the Software. Such limits may restrict use to a maximum number of seats, registered endpoints, concurrent users, sessions, calls, connections, subscribers, clusters, nodes, realms, devices, links, ports or transactions, or require the purchase of separate licenses to use particular features, functionalities, services, applications, operations, or capabilities, or provide throughput, performance, configuration, bandwidth, interface, processing, temporal, or geographical limits. In addition, such limits may restrict the use of the Software to managing certain kinds of networks or require the Software to be used only in conjunction with other specific Software. Customer’s use of the Software shall be subject to all such limitations and purchase of all applicable licenses.

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e. The Global Enterprise Edition of the Steel-Belted Radius software may be used by Customer only to manage access to Customer’s enterprise network. Specifically, service provider customers are expressly prohibited from using the Global Enterprise Edition of the Steel-Belted Radius software to support any commercial network access services.

The foregoing license is not transferable or assignable by Customer. No license is granted herein to any user who did not originally purchase the applicable license(s) for the Software from Juniper or an authorized Juniper reseller.

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5. Audit. Customer shall maintain accurate records as necessary to verify compliance with this Agreement. Upon request by Juniper, Customer shall furnish such records to Juniper and certify its compliance with this Agreement.

6. Confidentiality. The Parties agree that aspects of the Software and associated documentation are the confidential property of Juniper. As such, Customer shall exercise all reasonable commercial efforts to maintain the Software and associated documentation in confidence, which at a minimum includes restricting access to the Software to Customer employees and contractors having a need to use the Software for Customer’s internal business purposes.

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7. Ownership. Juniper and Juniper's licensors, respectively, retain ownership of all right, title, and interest (including copyright) in and to the Software, associated documentation, and all copies of the Software. Nothing in this Agreement constitutes a transfer or conveyance of any right, title, or interest in the Software or associated documentation, or a sale of the Software, associated documentation, or copies of the Software.

8. Warranty, Limitation of Liability, Disclaimer of Warranty. The warranty applicable to the Software shall be as set forth in the warranty statement that accompanies the Software (the “Warranty Statement”). Nothing in this Agreement shall give rise to any obligation to support the Software. Support services may be purchased separately. Any such support shall be governed by a separate, written support services agreement. TO THE MAXIMUM EXTENT PERMITTED BY LAW, JUNIPER SHALL NOT BE LIABLE FOR ANY LOST PROFITS, LOSS OF DATA, OR COSTS OR PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, THE SOFTWARE, OR ANY JUNIPER OR JUNIPER-SUPPLIED SOFTWARE. IN NO EVENT SHALL JUNIPER BE LIABLE FOR DAMAGES ARISING FROM UNAUTHORIZED OR IMPROPER USE OF ANY JUNIPER OR JUNIPER-SUPPLIED SOFTWARE. EXCEPT AS EXPRESSLY PROVIDED IN THE WARRANTY STATEMENT TO THE EXTENT PERMITTED BY LAW, JUNIPER DISCLAIMS ANY AND ALL WARRANTIES IN AND TO THE SOFTWARE (WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE), INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NONINFRINGEMENT. IN NO EVENT DOES JUNIPER WARRANT THAT THE SOFTWARE, OR ANY EQUIPMENT OR NETWORK RUNNING THE SOFTWARE, WILL OPERATE WITHOUT ERROR OR INTERRUPTION, OR WILL BE FREE OF VULNERABILITY TO INTRUSION OR ATTACK. In no event shall Juniper’s or its suppliers’ or licensors’ liability to Customer, whether in contract, tort (including negligence), breach of warranty, or otherwise, exceed the price paid by Customer for the Software that gave rise to the claim, or if the Software is embedded in another Juniper product, the price paid by Customer for such other product. Customer acknowledges and agrees that Juniper has set its prices and entered into this Agreement in reliance upon the disclaimers of warranty and the limitations of liability set forth herein, that the same reflect an allocation of risk between the Parties (including the risk that a contract remedy may fail of its essential purpose and cause consequential loss), and that the same form an essential basis of the bargain between the Parties.

9. Termination. Any breach of this Agreement or failure by Customer to pay any applicable fees due shall result in automatic termination of the license granted herein. Upon such termination, Customer shall destroy or return to Juniper all copies of the Software and related documentation in Customer’s possession or control.

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12. Commercial Computer Software. The Software is “commercial computer software” and is provided with restricted rights. Use, duplication, or disclosure by the United States government is subject to restrictions set forth in this Agreement and as provided in DFARS 227.7201 through 227.7202-4, FAR 12.212, FAR 27.405(b)(2), FAR 52.227-19, or FAR 52.227-14(ALT III) as applicable.

13. Interface Information. To the extent required by applicable law, and at Customer's written request, Juniper shall provide Customer with the interface information needed to achieve interoperability between the Software and another independently created program, on payment of applicable fee, if any. Customer shall observe strict obligations of confidentiality with respect to such information and shall use such information in compliance with any applicable terms and conditions upon which Juniper makes such information available.

14. Third Party Software. Any licensor of Juniper whose software is embedded in the Software and any supplier of Juniper whose products or technology are embedded in (or services are accessed by) the Software shall be a third party beneficiary with respect to this Agreement, and such licensor or vendor shall have the right to enforce this Agreement in its own name as if it were Juniper. In addition, certain third party software may be provided with the Software and is subject to the accompanying license(s), if any, of its respective owner(s). To the extent portions of the Software are distributed under and subject to open source licenses obligating Juniper to make the source code for such portions publicly available (such as the GNU General Public License (“GPL”) or the GNU Library General Public License (“LGPL”)), Juniper will make such source code portions (including Juniper modifications, as appropriate) available upon request for a period of up to three years from the date of distribution. Such request can be made in writing to Juniper Networks, Inc., 1194 N. Mathilda Ave., Sunnyvale, CA 94089, ATTN: General Counsel. You may obtain a copy of the GPL at http://www.gnu.org/licenses/gpl.html, and a copy of the LGPL at http://www.gnu.org/licenses/lgpl.html.

15. Miscellaneous. This Agreement shall be governed by the laws of the State of California without reference to its conflicts of laws principles. The provisions of the U.N. Convention for the International Sale of Goods shall not apply to this Agreement. For any disputes arising under this Agreement, the Parties hereby consent to the personal and exclusive jurisdiction of, and venue in, the state and federal courts within Santa Clara County, California. This Agreement constitutes the entire and sole agreement between Juniper and the Customer with respect to the Software, and supersedes all prior and contemporaneous agreements relating to the Software, whether oral or written (including any inconsistent terms contained in a purchase order), except that the terms of a separate written agreement executed by an authorized Juniper representative and Customer shall govern to the extent such terms are inconsistent or conflict with terms contained herein. No modification to this Agreement nor any waiver of any rights hereunder shall be effective unless expressly assented to in writing by the party to be charged. If any portion of this Agreement is held invalid, the Parties agree that such invalidity shall not affect the validity of the remainder of this Agreement. This Agreement and associated documentation has been written in the English language, and the Parties agree that the English version will govern. (For Canada: Les parties aux présentés confirment leur volonté que cette convention de même que tous les documents y compris tout avis qui s'y rattaché, soient redigés en langue anglaise. (Translation: The parties confirm that this Agreement and all related documentation is and will be in the English language)).

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About This Guide xvii

Objectives ....................................................................................................xvii

Audience .....................................................................................................xvii

Documentation Conventions ......................................................................xviii

List of Technical Publications ........................................................................xix

Obtaining Documentation ..........................................................................xxvi

Documentation Feedback ...........................................................................xxvi

Requesting Technical Support ....................................................................xxvii

Part 1 MX240 Router Overview

Chapter 1 Router Overview 3

Router Description ..........................................................................................3

Component Redundancy .................................................................................4

Chapter 2 Hardware Components 5

Router Chassis .................................................................................................5

Midplane .........................................................................................................8

Dense Port Concentrators (DPCs) ....................................................................8

DPC Components ...................................................................................10

Host Subsystem .............................................................................................11

Switch Control Board (SCB) .....................................................................11

SCB Slots ..........................................................................................12

SCB Redundancy ..............................................................................12

SCB Components ..............................................................................13

SCB LEDs .........................................................................................13

Routing Engine .......................................................................................14

Routing Engine Components ............................................................14

Routing Engine Interface Ports .........................................................16

Routing Engine Boot Sequence .........................................................16

Cable Management System ...........................................................................17

Craft Interface ...............................................................................................17

Alarm LEDs and Alarm Cutoff/Lamp Test Button ....................................18

Host Subsystem LEDs .............................................................................19

Power Supply LEDs .................................................................................19

DPC LEDs ...............................................................................................20

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MX240 Ethernet Services Router Hardware Guide

SCB LEDs ................................................................................................20

Fan LEDs ................................................................................................20

Alarm Relay Contacts ..............................................................................21

Power Supplies ..............................................................................................21

AC Power Supply ....................................................................................21

AC Power Supply LEDs .....................................................................22

DC Power Supply ....................................................................................23

DC Power Supply Configurations for the MX240 Router ...................23

DC Power Supply LEDs .....................................................................24

Cooling System .............................................................................................24

Part 2 Setting Up the Router

Chapter 3 Preparing the Site for Router Installation 29

Site Preparation Checklist ..............................................................................29

Cabinet Requirements ...................................................................................30

Cabinet Size and Clearance Requirements ..............................................30

Cabinet Airflow Requirements ................................................................30

Rack Requirements .......................................................................................31

Rack Size and Strength ...........................................................................31

Spacing of Mounting Bracket Holes .........................................................32

Connection to Building Structure ............................................................32

Clearance Requirements for Airflow and Hardware Maintenance ..................32

Chapter 4 Installation Overview 35

Chapter 5 Unpacking the Router 37

Tools and Parts Required ..............................................................................37

Unpacking the Router ....................................................................................37

Verifying Parts Received ................................................................................38

Chapter 6 Installing the Mounting Hardware 41

Installing the Mounting Hardware for a Rack or Cabinet ...............................41

Moving the Mounting Brackets for Center-Mounting the Router ....................43

Chapter 7 Installing the Router 45

Safety Requirements, Warnings, and Guidelines ...........................................45

Installing the Router Using a Mechanical Lift .................................................45

Tools Required ........................................................................................46

Installing the Router Using a Lift .............................................................46

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Chapter 8 Connecting the Router 49

Tools and Parts Required ..............................................................................49

Connecting the Router to Management and Alarm Devices ...........................49

Connecting to a Network for Out-of-Band Management ..........................50

Connecting to a Management Console or Auxiliary Device .....................50

Connecting to an External Alarm-Reporting Device ................................50

Connecting DPC Cables .................................................................................51

Chapter 9 Grounding and Providing Power to the Router 53

Tools and Parts Required ..............................................................................53

Grounding the Router ....................................................................................54

Connecting Power to an AC-Powered Router .................................................54

Powering On an AC-Powered Router .............................................................55

Connecting Power to a DC-Powered Router ..................................................56

Powering On a DC-Powered Router ...............................................................58

Powering Off the Router ................................................................................59

Chapter 10 Configuring JUNOS Software 61

Configuring the JUNOS Software ...................................................................61

Part 3 Hardware Maintenance, Troubleshooting, and Replacement

Procedures

Chapter 11 Maintaining Hardware Components 67

Tools and Parts Required ..............................................................................67

Routine Maintenance Procedures ..................................................................67

Maintaining Cooling System Components .....................................................68

Maintaining the Air Filter ........................................................................68

Maintaining the Fan Tray ........................................................................68

Maintaining the Host Subsystem ...................................................................70

Maintaining Packet Forwarding Engine Components ....................................72

Maintaining DPCs ...................................................................................72

Maintaining DPC Cables ..........................................................................74

Handling and Storing DPCs .....................................................................74

Holding a DPC ..................................................................................75

Storing a DPC ...................................................................................77

Maintaining the Power Supplies ....................................................................78

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MX240 Ethernet Services Router Hardware Guide

Chapter 12 Troubleshooting Hardware Components 79

Overview of Troubleshooting Resources ........................................................79

Juniper Networks Technical Assistance Center ........................................79

Command-Line Interface ........................................................................79

Chassis and Interface Alarm Messages ....................................................80

Alarm Relay Contacts ..............................................................................80

LEDs .......................................................................................................80

Craft Interface LEDs .........................................................................80

Component LEDs .............................................................................81

Troubleshooting the Cooling System .............................................................82

Troubleshooting DPCs ...................................................................................83

Troubleshooting the Power System ...............................................................84

Chapter 13 Replacing Hardware Components 87

Field-Replaceable Units (FRUs) ......................................................................87

Tools and Parts Required ..............................................................................88

Replacing the Craft Interface .........................................................................89

Removing the Craft Interface ..................................................................89

Installing the Craft Interface ....................................................................90

Replacing Alarm Relay Wires ..................................................................91

Disconnecting the Alarm Relay Wires ..............................................91

Connecting the Alarm Relay Wires ...................................................92

Replacing Cooling System Components ........................................................92

Replacing the Fan Tray ...........................................................................92

Removing the Fan Tray ....................................................................92

Installing the Fan Tray ......................................................................93

Replacing the Air Filter ...........................................................................94

Removing an Air Filter .....................................................................94

Installing the Air Filter ......................................................................95

Replacing Host Subsystem Components .......................................................96

Taking the Host Subsystem Offline .........................................................96

Replacing an SCB ....................................................................................97

Operating and Positioning the SCB Ejectors .....................................98

Removing an SCB .............................................................................99

Installing an SCB ............................................................................100

Replacing a Routing Engine .........................................................................102

Removing a Routing Engine ..................................................................102

Installing a Routing Engine ...................................................................103

Replacing Connections to Routing Engine Interface Ports ...........................104

Replacing the Management Ethernet Cable ...........................................105

Removing the Management Ethernet Cable ...................................105

Installing the Management Ethernet Cable .....................................105

Replacing the Console or Auxiliary Cable ..............................................105

Disconnecting the Cable from a Management Console or Auxiliary

Device ......................................................................................105

Connecting the Cable to a Management Console or Auxiliary

Device ......................................................................................106

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Replacing DPCs and Transceivers ................................................................106

Replacing a DPC ...................................................................................106

Removing a DPC ............................................................................106

Installing a DPC ..............................................................................108

Removing an SFP or XFP Transceiver ...................................................110

Installing an SFP or XFP Transceiver .....................................................112

Replacing Power System Components ........................................................112

Removing an AC Power Supply .............................................................113

Installing an AC Power Supply ..............................................................114

Removing a DC Power Supply ..............................................................114

Installing a DC Power Supply ................................................................116

Replacing an AC Power Cord ................................................................118

Disconnecting an AC Power Cord ...................................................119

Connecting an AC Power Supply Cord ............................................119

Replacing a DC Power Supply Cable .....................................................119

Disconnecting a DC Power Supply Cable ........................................120

Connecting a DC Power Supply Cable ............................................120

Replacing the Cable Management System ...................................................121

Removing the Cable Management System ............................................121

Installing the Cable Management System ..............................................122

Part 4 Appendixes

Appendix A Safety and Regulatory Compliance Information 125

Definition of Safety Warning Levels ............................................................125

Safety Guidelines and Warnings ..................................................................126

General Safety Guidelines and Warnings ...............................................127

Qualified Personnel Warning ..........................................................127

Restricted Access Area Warning .....................................................128

Preventing Electrostatic Discharge Damage ...................................130

Fire Safety Requirements ......................................................................130

Fire Suppression .............................................................................131

Fire Suppression Equipment ...........................................................131

Installation Safety Guidelines and Warnings .........................................131

Chassis-Lifting Guidelines ...............................................................132

Installation Instructions Warning ....................................................132

Rack-Mounting Requirements and Warnings ..................................133

Ramp Warning ...............................................................................136

Laser and LED Safety Guidelines and Warnings ....................................136

General Laser Safety Guidelines ......................................................137

Class 1 Laser Product Warning .......................................................137

Class 1 LED Product Warning .........................................................137

Laser Beam Warning ......................................................................138

Radiation from Open Port Apertures Warning ................................139

Maintenance and Operational Safety Guidelines and Warnings ............139

Battery Handling Warning ..............................................................140

Jewelry Removal Warning ..............................................................141

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MX240 Ethernet Services Router Hardware Guide

Lightning Activity Warning .............................................................142

Operating Temperature Warning ....................................................142

Product Disposal Warning ..............................................................143

Electrical Safety Guidelines and Warnings ............................................144

In Case of Electrical Accident .........................................................144

General Electrical Safety Guidelines and Warnings .........................145

AC Power Electrical Safety Guidelines ............................................148

DC Power Electrical Safety Guidelines and Warnings .....................149

Agency Approvals and Compliance .............................................................155

Agency Approvals .................................................................................155

Compliance Statements for NEBs Requirements ...................................156

Compliance Statements for EMC Requirements ....................................157

Canada ...........................................................................................157

European Community ....................................................................157

Japan ..............................................................................................158

United States ..................................................................................159

Compliance Statements for Environmental Requirements ....................159

Lithium Battery ..............................................................................159

Compliance Statements for Acoustic Noise ...........................................159

Appendix B Physical Specifications 161

Physical Specifications ................................................................................161

Appendix C Router Environmental Specifications 163

Router Environmental Specifications ...........................................................163

Appendix D Power Guidelines, Requirements, and Specifications 165

Chassis Grounding Specifications ................................................................165

Grounding Cable Lug Specification ........................................................165

Grouding Cable Specification ................................................................166

DC Power Specifications and Requirements ................................................166

DC Power Specifications .......................................................................166

DC Power System Electrical Specifications .....................................167

DC Power Supply Electrical Specifications ......................................167

Power Consumption for DC-Powered Routers .......................................167

DC Power Circuit Breaker Specifications ...............................................169

DC Power Cable Specifications .............................................................170

DC Power Cable Lug Specifications ................................................171

DC Power Cable Specifications .......................................................171

AC Power Specifications and Requirements ................................................171

AC Power Specifications .......................................................................172

AC Power System Electrical Specifications .....................................172

AC Power Supply Electrical Specifications ......................................172

Power Consumption for AC-Powered Routers .......................................172

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AC Power Circuit Breaker Specifications ...............................................174

AC Power Cord Specifications ...............................................................174

Site Electrical Wiring Guidelines ..................................................................176

Distance Limitations for Signaling .........................................................176

Radio Frequency Interference ...............................................................176

Electromagnetic Compatibility ..............................................................176

Appendix E Cable and Wire Guidelines and Specifications 179

Network Cable Specifications and Guidelines ..............................................179

Fiber-Optic and Network Cable Specifications ......................................179

Signal Loss in Multimode and Single-Mode Fiber-Optic Cable ...............179

Attenuation and Dispersion in Fiber-Optic Cable ..................................180

Calculating Power Budget for Fiber-Optic Cable ....................................181

Calculating Power Margin for Fiber-Optic Cable ....................................181

Routing Engine Interface Cable and Wire Specifications ..............................183

Appendix F Cable Connector Pinouts 185

RJ-45 Connector Pinouts for the Routing Engine ETHERNET Port ...............185

RJ-45 Connector Pinouts for the Routing Engine AUX and CONSOLE

Ports .....................................................................................................185

Appendix G Installing the Router Without a Mechanical Lift 187

Tools and Parts Required ............................................................................187

Removing Components from the Chassis ....................................................187

Removing the Power Supplies ...............................................................188

Removing the Fan Tray .........................................................................189

Removing SCBs .....................................................................................189

Removing DPCs ....................................................................................190

Installing the Chassis in the Rack Manually .................................................192

Reinstalling Components in the Chassis ......................................................193

Reinstalling the Power Supplies ............................................................193

Reinstalling the Fan Tray ......................................................................194

Reinstalling SCBs ..................................................................................195

Reinstalling DPCs ..................................................................................196

Appendix H Contacting Customer Support and Returning Hardware 197

Locating Component Serial Numbers ..........................................................197

MX240 Chassis Serial Number Label .....................................................198

SCB Serial Number Label ......................................................................199

DPC Serial Number Label ......................................................................200

Power Supply Serial Number Labels ......................................................200

Routing Engine Serial Number Label .....................................................201

Contacting Customer Support ......................................................................202

Information You Might Need to Supply to JTAC ....................................202

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MX240 Ethernet Services Router Hardware Guide

Return Procedure ........................................................................................203

Tools and Parts Required ............................................................................204

Packing the Router for Shipment .................................................................204

Packing Components for Shipment .............................................................205

Part 5 Index

Index ...........................................................................................................209

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List of Figures

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

Figure 2: Rear View of a Fully Configured AC-Powered Router Chassis (110

V) ..............................................................................................................6

Figure 3: Rear View of a Fully Configured AC-Powered Router Chassis

(220V) .......................................................................................................7

Figure 4: Rear View of a Fully Configured DC-Powered Router Chassis ...........7

Figure 5: Midplane ..........................................................................................8

Figure 6: Typical DPCs Supported on the MX240 Router .................................9

Figure 7: DPC Installed Horizontally in the MX240 Router ..............................9

Figure 8: SCB .................................................................................................12

Figure 9: Routing Engine ...............................................................................14

Figure 10: USB Memory Device in a Routing Engine .....................................15

Figure 11: Cable Management System ..........................................................17

Figure 12: Cable Management System Installed on the Router ......................17

Figure 13: Front Panel of the Craft Interface .................................................18

Figure 14: Alarm Relay Contacts ...................................................................21

Figure 15: AC Power Supply ..........................................................................22

Figure 16: DC Power Supply ..........................................................................23

Figure 17: Airflow Through Chassis ...............................................................25

Figure 18: Fan Tray .......................................................................................25

Figure 19: Air Filter .......................................................................................26

Figure 20: Typical Open-Frame Rack ............................................................32

Figure 21: Chassis Dimensions and Clearance Requirements ........................33

Figure 22: Contents of the Shipping Crate .....................................................38

Figure 23: Installing the Front Mounting Hardware for a Four-Post Rack or

Cabinet ...................................................................................................42

Figure 24: Installing the Mounting Hardware for an Open-Frame Rack .........43

Figure 25: Installing the Router in the Rack ...................................................47

Figure 26: Routing Engine Management Ports ...............................................49

Figure 27: RJ-45 Cable Connector ..................................................................50

Figure 28: Alarm Relay Contacts ...................................................................51

Figure 29: Attaching a Cable to a DPC ...........................................................52

Figure 30: Connecting AC Power to the Router .............................................55

Figure 31: Connecting DC Power to the Router .............................................58

Figure 32: DPC Edges ....................................................................................75

Figure 33: Do Not Grasp the Connector Edge ................................................76

Figure 34: Do Not Rest the DPC on an Edge ..................................................77

Figure 35: Airflow Through the Chassis .........................................................82

Figure 36: Removing the Craft Interface ........................................................90

Figure 37: Installing a Craft Interface ............................................................91

Figure 38: Alarm Relay Contacts ...................................................................91

Figure 39: Removing the Fan Tray from an MX240 Router ...........................93

List of Figures ■ xiii

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MX240 Ethernet Services Router Hardware Guide

Figure 40: Installing the Fan Tray in an MX240 Router .................................94

Figure 41: Removing the Air Filter from an MX240 Router ...........................95

Figure 42: Installing the Air Filter in an MX240 Router ..................................96

Figure 43: Removing an SCB .........................................................................99

Figure 44: Installing an SCB .........................................................................102

Figure 45: Removing a Routing Engine .......................................................103

Figure 46: Installing a Routing Engine .........................................................104

Figure 47: Routing Engine Interface Ports ...................................................104

Figure 48: Cable Connectors .......................................................................105

Figure 49: Removing a DPC ........................................................................108

Figure 50: Installing a DPC ..........................................................................110

Figure 51: Attaching a Cable to a DPC .........................................................110

Figure 52: Removing SFPs or XFPs .............................................................111

Figure 53: Removing an AC Power Supply ..................................................113

Figure 54: Installing an AC Power Supply ....................................................114

Figure 55: Removing a DC Power Supply from an MX240 Router ...............116

Figure 56: Installing a DC Power Supply in an MX240 Router .....................118

Figure 57: Connecting DC Power to the Router ...........................................118

Figure 58: Connecting Power Cables to the DC Power Supply .....................121

Figure 59: Removing or Installing the Cable Management System ..............122

Figure 60: Placing a Component into an Electrostatic Bag ...........................130

Figure 61: Grounding Cable Lug ..................................................................166

Figure 62: Typical DC Source Cabling to the Router ....................................170

Figure 63: DC Power Cable Lug ...................................................................171

Figure 64: AC Plug Types ............................................................................175

Figure 65: Removing a Power Supply Before Installing the Router ..............188

Figure 66: Removing the Fan Tray ..............................................................189

Figure 67: Removing an SCB .......................................................................190

Figure 68: Removing a DPC ........................................................................191

Figure 69: Installing the Router in the Rack .................................................193

Figure 70: Reinstalling a Power Supply ........................................................194

Figure 71: Installing a Fan Tray ...................................................................195

Figure 72: Installing an SCB .........................................................................196

Figure 73: Installing a DPC ..........................................................................196

Figure 74: Serial Number ID Label ..............................................................198

Figure 75: MX240 Chassis Serial Number Label ..........................................199

Figure 76: SCB Serial Number Label ............................................................199

Figure 77: DPC Serial Number Label ...........................................................200

Figure 78: AC Power Supply Serial Number Label .......................................201

Figure 79: DC Power Supply Serial Number Label .......................................201

Figure 80: Routing Engine Serial Number Label ..........................................202

xiv ■ List of Figures

Page 15

List of Tables

Table 1: Notice Icons ..................................................................................xviii

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

Table 3: Technical Documentation for Supported Routing Platforms .............xx

Table 4: JUNOS Software Network Operations Guides ................................xxiv

Table 5: JUNOS Software with Enhanced Services Documentation .............xxiv

Table 6: Additional Books Available Through

http://www.juniper.net/books ................................................................xxv

Table 7: Four-Port 10-Gigabit Ethernet DPC LEDs ..........................................10

Table 8: 40-Port Gigabit Ethernet DPC LEDs ..................................................10

Table 9: Switch Control Board LEDs ..............................................................13

Table 10: Routing Engine LEDs .....................................................................16

Table 11: Alarm LEDs and Alarm Cutoff/Lamp Test Button ...........................19

Table 12: Host Subsystem LEDs ....................................................................19

Table 13: Power Supply LEDs on the Craft Interface .....................................19

Table 14: DPC LEDs ......................................................................................20

Table 15: SCB LEDs .......................................................................................20

Table 16: Fan LEDs .......................................................................................20

Table 17: AC Power Supply LEDs ..................................................................23

Table 18: DC Power Supply LEDs ..................................................................24

Table 19: Site Preparation Checklist ..............................................................29

Table 20: Parts List for a Fully Configured Router ..........................................39

Table 21: Accessory Box Parts List ................................................................39

Table 22: Four-Post Rack or Cabinet Mounting Hole Locations ......................41

Table 23: Field-Replaceable Units ..................................................................88

Table 24: Tools and Parts Required ...............................................................88

Table 25: Physical Specifications .................................................................161

Table 26: Router Environmental Specifications ...........................................163

Table 27: Grounding Cable Specifications ....................................................166

Table 28: DC Power System Electrical Specifications ...................................167

Table 29: DC Power Supply Electrical Specifications ...................................167

Table 30: DC-Powered Base Router Power Requirements ...........................168

Table 31: Component Power Requirements ................................................168

Table 32: DC Power Cable Specifications ....................................................171

Table 33: AC Power System Electrical Specifications ...................................172

Table 34: AC Power Supply Electrical Specifications ....................................172

Table 35: AC Base Router Power Requirements ..........................................173

Table 36: Component Power Requirements for AC-Powered Routers ..........173

Table 37: AC Power Cord Specifications ......................................................175

Table 38: Estimated Values for Factors Causing Link Loss .........................181

Table 39: Cable and Wire Specifications for Routing Engine Management

and Alarm Interfaces ............................................................................183

List of Tables ■ xv

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MX240 Ethernet Services Router Hardware Guide

Table 40: RJ-45 Connector Pinout for the Routing Engine ETHERNET

Port .......................................................................................................185

Table 41: RJ-45 Connector Pinout for the AUX and CONSOLE Ports ............186

xvi ■ List of Tables

Page 17

About This Guide

This preface provides the following guidelines for using the MX240 Ethernet Services Router Hardware Guide:

■ Objectives on page xvii

■ Audience on page xvii

■ Documentation Conventions on page xviii

■ List of Technical Publications on page xix

■ Obtaining Documentation on page xxvi

■ Documentation Feedback on page xxvi

■ Requesting Technical Support on page xxvii

Objectives

This manual describes hardware components, installation, basic configuration, and basic troubleshooting procedures for the Juniper Networks MX240 Ethernet Services Router. It explains how to prepare your site for router installation, unpack and install the hardware, power on the router, perform initial software configuration, and perform routine maintenance. After completing the installation and basic configuration procedures covered in this manual, see the JUNOS software configuration guides for information about further JUNOS software configuration.

Audience

NOTE: For additional information about Juniper Networks Ethernet Services routers and the Dense Port Concentrators (DPCs) they support—either corrections to or information that might have been omitted from this guide—see the hardware release notes at http://www.juniper.net/.

This guide is designed for network administrators who are installing and maintaining a Juniper Networks router or preparing a site for router installation. To use this guide, you need a broad understanding of networks in general, the Internet in particular, networking principles, and network configuration. Any detailed discussion of these concepts is beyond the scope of this guide.

Objectives ■ xvii

Page 18

MX240 Ethernet Services Router Hardware Guide

Documentation Conventions

Table 1 on page xviii defines the notice icons used in this 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

Table 2 on page xviii defines the text and syntax conventions used in this guide.

Table 2: Text and Syntax Conventions

Bold text like this

Fixed-width text like this

Italic text like this

Represents text that you type.

Represents output that appears on the terminal screen.

Introduces important new terms.

■

Identifies book names.

■

Identifies RFC and Internet draft

■

titles.

Represents variables (options for which you substitute a value) in commands or configuration statements.

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 System Basics Configuration

■

Guide RFC 1997, BGP Communities

■

Attribute

Configure the machine’s domain name:

[edit] root@# set system domain-name

domain-name

xviii ■ Documentation Conventions

Page 19

Table 2: Text and Syntax Conventions (continued)

About This Guide

ExamplesDescriptionConvention

Plain text like this

| (pipe symbol)

# (pound sign)

[ ] (square brackets)

Indention and braces ( { } )

; (semicolon)

Represents names of configuration statements, commands, files, and directories; IP addresses; configuration hierarchy levels; or labels on routing platform components.

Enclose optional keywords or variables.< > (angle brackets)

Indicates a choice between the mutually exclusive keywords or variables on either side of the symbol. The set of choices is often enclosed in parentheses for clarity.

Indicates a comment specified on the same line as the configuration statement to which it applies.

Enclose a variable for which you can substitute one or more values.

Identify a level in the configuration hierarchy.

Identifies a leaf statement at a configuration hierarchy level.

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>;

broadcast | multicast

(string1 | string2 | string3)

rsvp { # Required for dynamic MPLS only

community name members [ community-ids ]

[edit] routing-options {

static {

route default {

nexthop address; retain;

}

J-Web GUI Conventions

Bold text like this

> (bold right angle bracket)

List of Technical Publications

Table 3 on page xx lists the software and hardware guides and release notes for Juniper Networks J-series, M-series, MX-series, and T-series routing platforms and describes the contents of each document. Table 4 on page xxiv lists the books included in the Network Operations Guide series. Table 5 on page xxiv lists the manuals and release notes supporting JUNOS software with enhanced services. All documents are available at http://www.juniper.net/techpubs/.

Represents J-Web graphical user interface (GUI) items you click or select.

Separates levels in a hierarchy of J-Web selections.

In the Logical Interfaces box, select

■

All Interfaces. To cancel the configuration, click

■

Cancel.

In the configuration editor hierarchy, select Protocols>Ospf.

List of Technical Publications ■ xix

Page 20

MX240 Ethernet Services Router Hardware Guide

Table 6 on page xxv lists additional books on Juniper Networks solutions that you can order through your bookstore. A complete list of such books is available at

http://www.juniper.net/books.

Table 3: Technical Documentation for Supported Routing Platforms

DescriptionBook

JUNOS Software for Supported Routing Platforms

Access Privilege

Explains how to configure access privileges in user classes by using permission flags and regular expressions. Lists the permission flags along with their associated command-line interface (CLI) operational mode commands and configuration statements.

Class of Service

CLI User Guide

Feature Guide

High Availability

MPLS Applications

Multicast Protocols

Multiplay Solutions

Provides an overview of the class-of-service (CoS) functions of the JUNOS software and describes how to configure CoS features, including configuring multiple forwarding classes for transmitting packets, defining which packets are placed into each output queue, scheduling the transmission service level for each queue, and managing congestion through the random early detection (RED) algorithm.

Describes how to use the JUNOS command-line interface (CLI) to configure, monitor, and manage Juniper Networks routing platforms. This material was formerly covered in the JUNOS System Basics Configuration Guide.

Provides a detailed explanation and configuration examples for several of the most complex features in the JUNOS software.

Provides an overview of hardware and software resources that ensure a high level of continuous routing platform operation and describes how to configure high availability (HA) features such as nonstop active routing (NSR) and graceful Routing Engine switchover (GRES).

Provides an overview of traffic engineering concepts and describes how to configure traffic engineering protocols.

Provides an overview of multicast concepts and describes how to configure multicast routing protocols.

Describes how you can deploy IPTV and voice over IP (VoIP) services in your network.

MX-series Solutions Guide

Network Interfaces

Network Management

xx ■ List of Technical Publications

Describes common configuration scenarios for the Layer 2 features supported on the MX-series routers, including basic bridged VLANs with normalized VLAN tags, aggregated Ethernet links, bridge domains, Multiple Spanning Tree Protocol (MSTP), and integrated routing and bridging (IRB).

Provides an overview of the network interface functions of the JUNOS software and describes how to configure the network interfaces on the routing platform.

Provides an overview of network management concepts and describes how to configure various network management features, such as SNMP and accounting options.

Page 21

Table 3: Technical Documentation for Supported Routing Platforms (continued)

DescriptionBook

About This Guide

Policy Framework

Routing Protocols

Secure Configuration Guide for Common Criteria and JUNOS-FIPS

Services Interfaces

Software Installation and Upgrade Guide

System Basics

VPNs

Provides an overview of policy concepts and describes how to configure routing policy, firewall filters, and forwarding options.

Provides an overview of routing concepts and describes how to configure routing, routing instances, and unicast routing protocols.

Provides an overview of secure Common Criteria and JUNOS-FIPS protocols for the JUNOS software and describes how to install and configure secure Common Criteria and JUNOS-FIPS on a routing platform.

Provides an overview of the services interfaces functions of the JUNOS software and describes how to configure the services interfaces on the router.

Describes the JUNOS software components and packaging and explains how to initially configure, reinstall, and upgrade the JUNOS system software. This material was formerly covered in the JUNOS System Basics Configuration Guide.

Describes Juniper Networks routing platforms and explains how to configure basic system parameters, supported protocols and software processes, authentication, and a variety of utilities for managing your router on the network.

Provides an overview and describes how to configure Layer 2 and Layer 3 virtual private networks (VPNs), virtual private LAN service (VPLS), and Layer 2 circuits. Provides configuration examples.

JUNOS References

Hierarchy and RFC Reference

Interfaces Command Reference

Routing Protocols and Policies Command Reference

System Basics and Services Command Reference

System Log Messages Reference

Describes the JUNOS configuration mode commands. Provides a hierarchy reference that displays each level of a configuration hierarchy, and includes all possible configuration statements that can be used at that level. This material was formerly covered in the JUNOS System Basics Configuration Guide.

Describes the JUNOS software operational mode commands you use to monitor and troubleshoot interfaces.

Describes the JUNOS software operational mode commands you use to monitor and troubleshoot routing policies and protocols, including firewall filters.

Describes the JUNOS software operational mode commands you use to monitor and troubleshoot system basics, including commands for real-time monitoring and route (or path) tracing, system software management, and chassis management. Also describes commands for monitoring and troubleshooting services such as class of service (CoS), IP Security (IPSec), stateful firewalls, flow collection, and flow monitoring.

Describes how to access and interpret system log messages generated by JUNOS software modules and provides a reference page for each message.

List of Technical Publications ■ xxi

Page 22

MX240 Ethernet Services Router Hardware Guide

Table 3: Technical Documentation for Supported Routing Platforms (continued)

DescriptionBook

J-Web User Guide

J-Web Interface User Guide

Describes how to use the J-Web graphical user interface (GUI) to configure, monitor, and manage Juniper Networks routing platforms.

JUNOS API and Scripting Documentation

JUNOScript API Guide

Describes how to use the JUNOScript application programming interface (API) to monitor and configure Juniper Networks routing platforms.

JUNOS XML API Configuration Reference

JUNOS XML API Operational Reference

NETCONF API Guide

JUNOS Configuration and Diagnostic Automation Guide

Hardware Documentation

Hardware Guide

PIC Guide

DPC Guide

JUNOScope Documentation

JUNOScope Software User Guide

Provides reference pages for the configuration tag elements in the JUNOS XML API.

Provides reference pages for the operational tag elements in the JUNOS XML API.

Describes how to use the NETCONF API to monitor and configure Juniper Networks routing platforms.

Describes how to use the commit script and self-diagnosis features of the JUNOS software. This guide explains how to enforce custom configuration rules defined in scripts, how to use commit script macros to provide simplified aliases for frequently used configuration statements, and how to configure diagnostic event policies.

Describes how to install, maintain, and troubleshoot routing platforms and components. Each platform has its own hardware guide.

Describes the routing platform's Physical Interface Cards (PICs). Each platform has its own PIC guide.

Describes the Dense Port Concentrators (DPCs) for all MX-series routers.

Describes the JUNOScope software graphical user interface (GUI), how to install and administer the software, and how to use the software to manage routing platform configuration files and monitor routing platform operations.

Advanced Insight Solutions (AIS) Documentation

Advanced Insight Solutions Guide

J-series Routing Platform Documentation

xxii ■ List of Technical Publications

Describes the Advanced Insight Manager (AIM) application, which provides a gateway between JUNOS devices and Juniper Support Systems (JSS) for case management and intelligence updates. Explains how to run AI scripts on Juniper Networks devices.

Page 23

Table 3: Technical Documentation for Supported Routing Platforms (continued)

DescriptionBook

About This Guide

Getting Started Guide

Basic LAN and WAN Access Configuration Guide

Advanced WAN Access Configuration Guide

Administration Guide

Release Notes

JUNOS Release Notes

Provides an overview, basic instructions, and specifications for J-series routing platforms. The guide explains how to prepare your site for installation, unpack and install the router and its components, install licenses, and establish basic connectivity. Use the Getting Started Guide for your router model.

Explains how to configure the interfaces on J-series Services Routers for basic IP routing with standard routing protocols, ISDN backup, and digital subscriber line (DSL) connections.

Explains how to configure J-series Services Routers in virtual private networks (VPNs) and multicast networks, configure data link switching (DLSw) services, and apply routing techniques such as policies, stateless and stateful firewall filters, IP Security (IPSec) tunnels, and class-of-service (CoS) classification for safer, more efficient routing.

Shows how to manage users and operations, monitor network performance, upgrade software, and diagnose common problems on J-series Services Routers.

Summarize new features and known problems for a particular software release, provide corrections and updates to published JUNOS, JUNOScript, and NETCONF manuals, provide information that might have been omitted from the manuals, and describe upgrade and downgrade procedures.

Hardware Release Notes

JUNOScope Release Notes

AIS Release Notes

AIS AI Script Release Notes

J-series Services Router Release Notes

Describe the available documentation for the routing platform and summarize known problems with the hardware and accompanying software. Each platform has its own release notes.

Contain corrections and updates to the published JUNOScope manual, provide information that might have been omitted from the manual, and describe upgrade and downgrade procedures.

Summarize AIS new features and guidelines, identify known and resolved problems, provide information that might have been omitted from the manuals, and provide initial setup, upgrade, and downgrade procedures.

Summarize AI Scripts new features, identify known and resolved problems, provide information that might have been omitted from the manuals, and provide instructions for automatic and manual installation, including deleting and rolling back.

Briefly describe Services Router features, identify known hardware problems, and provide upgrade and downgrade instructions.

List of Technical Publications ■ xxiii

Page 24

MX240 Ethernet Services Router Hardware Guide

Table 4: JUNOS Software Network Operations Guides

DescriptionBook

Baseline

Interfaces

MPLS

MPLS Log Reference

MPLS Fast Reroute

Hardware

Describes the most basic tasks for running a network using Juniper Networks products. Tasks include upgrading and reinstalling JUNOS software, gathering basic system management information, verifying your network topology, and searching log messages.

Describes tasks for monitoring interfaces. Tasks include using loopback testing and locating alarms.

Describes tasks for configuring, monitoring, and troubleshooting an example MPLS network. Tasks include verifying the correct configuration of the MPLS and RSVP protocols, displaying the status and statistics of MPLS running on all routing platforms in the network, and using the layered MPLS troubleshooting model to investigate problems with an MPLS network.

Describes MPLS status and error messages that appear in the output of the show mpls lsp extensive command. The guide also describes how and when to configure Constrained Shortest Path First (CSPF) and RSVP trace options, and how to examine a CSPF or RSVP failure in a sample network.

Describes operational information helpful in monitoring and troubleshooting an MPLS network configured with fast reroute (FRR) and load balancing.

Describes tasks for monitoring M-series and T-series routing platforms.

To configure and operate a J-series Services Router running JUNOS software with enhanced services, you must also use the configuration statements and operational mode commands documented in JUNOS configuration guides and command references. To configure and operate a WX Integrated Services Module, you must also use WX documentation.

Table 5: JUNOS Software with Enhanced Services Documentation

DescriptionBook

JUNOS Software with Enhanced Services Design and Implementation Guide

JUNOS Software with Enhanced Services J-series Services Router Quick Start

JUNOS Software with Enhanced Services J-series Services Router Getting Started Guide

Provides guidelines and examples for designing and implementing IP Security (IPSec) virtual private networks (VPNs), firewalls, and routing on J-series routers running JUNOS software with enhanced services.

Explains how to quickly set up a J-series router. This document contains router declarations of conformity.

Provides an overview, basic instructions, and specifications for J-series Services Routers. This guide explains how to prepare a site, unpack and install the router, replace router hardware, and establish basic router connectivity. This guide contains hardware descriptions and specifications.

xxiv ■ List of Technical Publications

Page 25

Table 5: JUNOS Software with Enhanced Services Documentation (continued)

DescriptionBook

About This Guide

JUNOS Software with Enhanced Services Migration Guide

JUNOS Software with Enhanced Services Interfaces and Routing Configuration Guide

JUNOS Software with Enhanced Services Security Configuration Guide

JUNOS Software with Enhanced Services Administration Guide

JUNOS Software with Enhanced Services CLI Reference

WXC Integrated Services Module Installation and Configuration Guide

Provides instructions for migrating an SSG device running ScreenOS software or a J-series router running the JUNOS software to JUNOS software with enhanced services.

Explains how to configure J-series router interfaces for basic IP routing with standard routing protocols, ISDN service, firewall filters (access control lists), and class-of-service (CoS) traffic classification.

Explains how to configure and manage security services such as stateful firewall policies, IPSec VPNs, firewall screens, Network Address translation (NAT) and Router interface modes, Public Key Cryptography, and Application Layer Gateways (ALGs).

Shows how to monitor the router and routing operations, firewall and security services, system alarms and events, and network performance. This guide also shows how to administer user authentication and access, upgrade software, and diagnose common problems.

Provides the complete JUNOS software with enhanced services configuration hierarchy and describes the configuration statements and operational mode commands not documented in the standard JUNOS manuals.

Explains how to install and initially configure a WXC Integrated Services Module in a J-series router for application acceleration.

JUNOS Software with Enhanced Services Release Notes

Summarize new features and known problems for a particular release of JUNOS software with enhanced services on J-series routers, including J-Web interface features and problems. The release notes also contain corrections and updates to the manuals and software upgrade and downgrade instructions for JUNOS software with enhanced services.

Table 6: Additional Books Available Through http://www.juniper.net/books

DescriptionBook

Interdomain Multicast Routing

JUNOS Cookbook

Provides background and in-depth analysis of multicast routing using Protocol Independent Multicast sparse mode (PIM SM) and Multicast Source Discovery Protocol (MSDP); details any-source and source-specific multicast delivery models; explores multiprotocol BGP (MBGP) and multicast IS-IS; explains Internet Gateway Management Protocol (IGMP) versions 1, 2, and 3; lists packet formats for IGMP, PIM, and MSDP; and provides a complete glossary of multicast terms.

Provides detailed examples of common JUNOS software configuration tasks, such as basic router configuration and file management, security and access control, logging, routing policy, firewalls, routing protocols, MPLS, and VPNs.

List of Technical Publications ■ xxv

Page 26

MX240 Ethernet Services Router Hardware Guide

Table 6: Additional Books Available Through http://www.juniper.net/books (continued)

DescriptionBook

MPLS-Enabled Applications

OSPF and IS-IS: Choosing an IGP for Large-Scale Networks

Routing Policy and Protocols for Multivendor IP Networks

The Complete IS-IS Protocol

Provides an overview of Multiprotocol Label Switching (MPLS) applications (such as Layer 3 virtual private networks [VPNs], Layer 2 VPNs, virtual private LAN service [VPLS], and pseudowires), explains how to apply MPLS, examines the scaling requirements of equipment at different points in the network, and covers the following topics: point-to-multipoint label switched paths (LSPs), DiffServ-aware traffic engineering, class of service, interdomain traffic engineering, path computation, route target filtering, multicast support for Layer 3 VPNs, and management and troubleshooting of MPLS networks.

Explores the full range of characteristics and capabilities for the two major link-state routing protocols: Open Shortest Path First (OSPF) and IS-IS. Explains architecture, packet types, and addressing; demonstrates how to improve scalability; shows how to design large-scale networks for maximum security and reliability; details protocol extensions for MPLS-based traffic engineering, IPv6, and multitopology routing; and covers troubleshooting for OSPF and IS-IS networks.

Provides a brief history of the Internet, explains IP addressing and routing (Routing Information Protocol [RIP], OSPF, IS-IS, and Border Gateway Protocol [BGP]), explores ISP peering and routing policies, and displays configurations for both Juniper Networks and other vendors' routers.

Provides the insight and practical solutions necessary to understand the IS-IS protocol and how it works by using a multivendor, real-world approach.

Obtaining Documentation

To obtain the most current version of all Juniper Networks technical documentation, see the products documentation page on the Juniper Networks Web site at

http://www.juniper.net/.

To order printed copies of this guide and other Juniper Networks technical documents, or to order a documentation CD, which contains this guide, contact your sales representative.

Copies of the Management Information Bases (MIBs) available in a software release are included on the documentation CDs and at http://www.juniper.net/.

Documentation Feedback

We encourage you to provide feedback, comments, and suggestions so that we can improve the documentation. You can send your comments to

techpubs-comments@juniper.net, or fill out the documentation feedback form at http://www.juniper.net/techpubs/docbug/docbugreport.html. If you are using e-mail, be sure

to include the following information with your comments:

■ Document name

■ Document part number

■ Page number

■ Software release version (not required for Network Operations Guides [NOGs])

xxvi ■ Obtaining Documentation

Page 27

Requesting Technical Support

Technical product support is available through the Juniper Networks Technical Assistance Center (JTAC). If you are a customer with an active J-Care or JNASC support contract, or are covered under warranty, and need postsales 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/customers/support/downloads/710059.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

About This Guide

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:

https://www.juniper.net/alerts/

■ Join and participate in the Juniper Networks Community Forum:

http://www.juniper.net/company/communities/

■

Open a case online in the CSC Case Manager: http://www.juniper.net/cm/

To verify service entitlement by product serial number, use our Serial Number Entitlement (SNE) Tool located at 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 Manager 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).

For international or direct-dial options in countries without toll-free numbers, visit us at http://www.juniper.net/support/requesting-support.html.

Requesting Technical Support ■ xxvii

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MX240 Ethernet Services Router Hardware Guide

xxviii ■ Requesting Technical Support

Page 29

Part 1

MX240 Router Overview

■ Router Overview on page 3

■ Hardware Components on page 5

MX240 Router Overview ■ 1

Page 30

MX240 Ethernet Services Router Hardware Guide

2 ■ MX240 Router Overview

Page 31

Chapter 1

Router Overview

This chapter provides an overview of the MX240 Ethernet Services Router, discussing the following topics:

■ Router Description on page 3

■ Component Redundancy on page 4

Router Description

The MX240 Ethernet Services Router is an Ethernet-optimized edge router that provides both switching and carrier-class Ethernet routing, with a capacity of up to 120 gigabits per second (Gbps), full duplex. The MX240 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 MX240 router is five rack units (U) tall. Several routers can be stacked in a single floor-to-ceiling rack, for increased port density per unit of floor space. Fully populated, the MX240 provides up to 120 Gigabit Ethernet or up to 12 10-Gigabit Ethernet ports.

The router provides two dedicated slots for Dense Port Concentrators (DPC), one dedicated slot for a Switch Control Board (SCB), and one multifunction slot for either one DPC or one SCB.

The Packet Forwarding Engines are combined with the Ethernet ports on a Dense Port Concentrator (DPC), which installs into the router chassis. Each Packet Forwarding Engine enables a throughput of 10 Gbps. The DPCs are connected to one or two SCBs. The connections between DPCs and SCBs are organized in three groups:

■ Switch Fabric—Connects the DPCs and provides for packet transport between

DPCs.

■ Control plane—Gigabit Ethernet links between the combined SCBs/Routing

Engines and each DPC. All board-to-board information is passed over Ethernet except for low-level status and commands.

■ Management signals—Provide low-level status diagnostic support.

Router Description ■ 3

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MX240 Ethernet Services Router Hardware Guide

Component Redundancy

The MX240 chassis provides redundancy and resiliency. The hardware system is fully redundant, including power supplies, Routing Engines, and SCBs.

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 Routing Engine functioning

together with an SCB. 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. To operate, each host subsystem requires a Routing Engine installed directly into in an SCB.

If the Routing Engines are configured for nonstop routing and graceful switchover, the backup Routing Engine automatically synchronizes its configuration and state with the master Routing Engine. Any update to the master Routing Engine state is replicated on the backup Routing Engine. If the backup Routing Engine assumes mastership, packet forwarding continues through the router without interruption. For more information about nonstop routing and graceful switchover, see the JUNOS High Availability Configuration Guide.

■ In the high-line (220 V) AC power configuration, the MX240 router contains one

or two AC power supplies, located horizontally at the rear of the chassis in slots

PEM0 and PEM2 (left to right) (see Figure 3 on page 7). The high-line

configuration requires one power supply, with the second power supply providing redundancy. Each AC power supply provides power to all components in the router. When two power supplies are present, they share power almost equally within a fully populated system. If one power supply fails or is removed, the remaining power supply assumes the entire electrical load without interruption. One power supply can provide the maximum configuration with full power for as long as the router is operational.

■ In the low-line (110 V) AC power configuration, the MX240 router contains either

two AC power supplies (nonredundant), located horizontally at the rear of the chassis in slots PEM0 and PEM1 (left to right); or four AC power supplies (redundant), located in slots PEM0 through PEM3 (left to right) (see Figure 2 on page 6). The low-line configuration requires two power supplies, and the third and fourth power supplies provide redundancy. Each AC power supply provides power to all components in the router. When two power supplies are present, they share power almost equally within a fully populated system. If one power supply in a redundant configuration fails or is removed, the remaining power supplies assume the entire electrical load without interruption. Two power supplies provide the maximum configuration with full power for as long as the router is operational.

■ Cooling system—The cooling system has redundant components, which are

controlled by the host subsystem. If one of the fans fails, the host subsystem increases the speed of the remaining fans to provide sufficient cooling for the router indefinitely.

4 ■ Component Redundancy

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Chapter 2

Hardware Components

This chapter provides an overview of the router's hardware components:

■ Router Chassis on page 5

■ Midplane on page 8

■ Dense Port Concentrators (DPCs) on page 8

■ Host Subsystem on page 11

■ Cable Management System on page 17

■ Craft Interface on page 17

■ Power Supplies on page 21

■ Cooling System on page 24

Router Chassis

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 6, Figure 3 on page 7, and Figure 4 on page 7). The chassis measures 8.71 in. (22.1 cm) high,

17.45 in. (44.3 cm) wide, and 24.5 in. (62.2 cm) deep (from the front-mounting brackets to the rear of the chassis). The chassis installs in standard 800-mm deep (or larger) enclosed cabinets, 19-in. equipment racks, or telco open-frame racks. See Table 25 on page 161.

Router Chassis ■ 5

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MX240 Ethernet Services Router Hardware Guide

Figure 1: Front View of a Fully Configured Router Chassis

Figure 2: Rear View of a Fully Configured AC-Powered Router Chassis (110 V)

6 ■ Router Chassis

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Chapter 2: Hardware Components

Figure 3: Rear View of a Fully Configured AC-Powered Router Chassis (220V)

Figure 4: Rear View of a Fully Configured DC-Powered Router Chassis

Router Chassis ■ 7

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MX240 Ethernet Services Router Hardware Guide

Midplane

The midplane is located toward the rear of the chassis and forms the rear of the DPC card cage (see Figure 5 on page 8). The DPCs and SCBs install into the midplane from the front of the chassis, and the power supplies install into the midplane from the rear of the chassis. The cooling system components also connect to the midplane.

The midplane performs the following major functions:

■ Data path—Data packets are transferred across the midplane between the DPCs

through the fabric ASICs on the SCBs.

■ Power distribution—The router power supplies connect to the midplane, which

distributes power to all the router components.

■ Signal path—The midplane provides the signal path to the DPCs, SCBs, Routing

Engines, and other system components for monitoring and control of the system.

Figure 5: Midplane

Dense Port Concentrators (DPCs)

A Dense Port Concentrator (DPC) is optimized for Ethernet density and supports up to 40 Gigabit Ethernet or four 10-Gigabit Ethernet ports (see Figure 6 on page 9). The DPC assembly combines packet forwarding and Ethernet interfaces on a single board, with four 10-Gbps Packet Forwarding Engines. Each Packet Forwarding Engine consists of one I-chip for Layer 3 processing and one Layer 2 network processor. The DPCs interface with the power supplies and Switch Control Boards (SCBs).

The router has two dedicated DPC slots. DPCs install horizontally in the front of the router (see Figure 6 on page 9). One multifunction slot numbered 1/0 supports either one DPC or one SCB. The DPC slots are numbered 1/0, 1, and 2 bottom to top. A DPC can be installed in any slot on the router that supports DPCs.

You can install any combination of DPC types in the router.

DPCs are hot-removable and hot-insertable, as described in “Field-Replaceable Units (FRUs)” on page 87. When you install a DPC in an operating router, the Routing

8 ■ Midplane

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Chapter 2: Hardware Components

Engine downloads the DPC software, the DPC runs its diagnostics, and the Packet Forwarding Engines housed on the DPC are enabled. Forwarding on other DPCs continues uninterrupted during this process. For DPC replacement instructions, see “Replacing a DPC” on page 106.

If a slot is not occupied by a DPC or SCB, a blank panel must be installed to shield the empty slot and to allow cooling air to circulate properly through the router.

Figure 6 on page 9 shows typical DPCs supported on the MX240 router. For more information about DPCs, see the MX-series Ethernet Services Router DPC Guide.

Figure 6: Typical DPCs Supported on the MX240 Router

Figure 7: DPC Installed Horizontally in the MX240 Router

Dense Port Concentrators (DPCs) ■ 9

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MX240 Ethernet Services Router Hardware Guide

DPC Components

Each DPC consists of the following components:

■ DPC cover, which functions as a ground plane and a stiffener.

■ Fabric interfaces.

■ Two Gigabit Ethernet interfaces that allow control information, route information,

and statistics to be sent between the Routing Engine and the CPU on the DPCs.

■ Two interfaces from the SCBs that enable the DPCs to be powered on and

controlled.

■ Physical DPC connectors.

■ Four Packet Forwarding Engines.

■ Midplane connectors and power circuitry.

■ Processor subsystem, which includes a 1.2-GHz CPU, system controller, and

1 GB of SDRAM.

■ Online button—Takes the DPC online or offline when pressed.

■ LEDs on the 4-port 10-Gigabit Ethernet faceplate, which indicate the port status.

LEDs are labeled top to bottom 0/0 through 0/3 (see Table 7 on page 10).

■ LEDs on a 40-port Gigabit Ethernet faceplate indicate the port status. LEDs are

labeled horizontally and left to right 0/0 through 0/5, 1/0 through 1/5, 2/0 through 2/5, and 3/0 through 3/5 (see Table 8 on page 10).

Table 7: Four-Port 10-Gigabit Ethernet DPC LEDs

DescriptionStateColorLabel

OK/FAIL

TUNNEL

LINK

Green

Red

Green

On steadily

Off

On steadily

Off

DPC is functioning normally.

DPC has failed.

Normal operating mode.

Port configured in tunnel mode.

Link is active.

No link.

Table 8: 40-Port Gigabit Ethernet DPC LEDs

OK/FAIL

10 ■ Dense Port Concentrators (DPCs)

Green

Red

On steadily

DescriptionStateColorLabel

DPC is functioning normally.

DPC has failed.

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Table 8: 40-Port Gigabit Ethernet DPC LEDs (continued)

DescriptionStateColorLabel

Chapter 2: Hardware Components

Host Subsystem

LINK

On steadilyGreen

Off

Link is active.

No link.

Two LEDs, located on the craft interface above the DPC, display the status of the DPC and are labeled OK and FAIL. For more information about the DPC LEDs located on the craft interface, see “DPC LEDs” on page 20.

The host subsystem provides the routing and system management functions of the router. You can install one or two host subsystems on the router. Each host subsystem functions as a unit; the Routing Engine must be installed directly into the Switch Control Board.

NOTE: We recommend that you install two host subsystems for redundant protection. If you install only one host subsystem, we recommend that you install it in slot 0.

Each host subsystem has three LEDs that display its status. The host subsystem LEDs are located on the upper left of the craft interface. For more information about the host subsystem LEDs, see “Host Subsystem LEDs” on page 19.

The host subsystem consists of the following components:

■ Switch Control Board (SCB) on page 11

■ Routing Engine on page 14

Switch Control Board (SCB)

The Switch Control Board (SCB) provides the following functions:

■ Powers on and powers off DPCs

■ Controls clocking, system resets and booting

■ Monitors and controls system functions, including fan speed, board power status,

PDM status and control, and the craft interface

■ Provides interconnections to all the DPCs within the chassis through the switch

fabrics integrated into the SCB

The Routing Engine installs directly into a slot on the SCB (see Figure 8 on page 12).

Host Subsystem ■ 11

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MX240 Ethernet Services Router Hardware Guide

Figure 8: SCB

SCB Slots

You can install one or two SCBs. The SCBs install horizontally into the front of the chassis in the slots labeled 0 and 1/0 (the multifunction slot1/0 can contain either SCB1 or DPC0). If any slots are empty, you must install a blank panel.

SCB Redundancy

If two SCBs are installed, one SCB functions as the master SCB and the other as its backup. If the master fails or is removed, the backup becomes the master.

12 ■ Host Subsystem

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Chapter 2: Hardware Components

SCB Components

Each SCB consists of the following components:

■ Chassis management Ethernet switch.

■ I2C bus logic, used for low-level communication with each component.

■ Component redundancy circuitry.

■ Control Board/Routing Engine mastership mechanism.

■ Gigabit Ethernet switch that is connected to the embedded CPU complex on all

components.

■ Switch fabric—Provides the switching functions for the DPCs.

■ Control FPGA—Provides the Peripheral Component Interconnect (PCI) interface

to the Routing Engine.

■ 1000Base-T Ethernet controller—Provides a 1-Gbps Ethernet link between the

Routing Engines.

■ Ethernet switch—Provides 1-Gbps link speeds between the Routing Engine and

the DPCs.

■ Circuits for chassis management and control.

■ Power circuits for the Routing Engine and SCB.

■ LEDs—Provide status (see “SCB LEDs” on page 13)

SCB LEDs

Three LEDs on the SCB indicate the status of the SCB. The LEDs, labeled FABRIC

ACTIVE, FABRIC ONLY, and OK/FAIL, are located directly on the SCB. Table 9 on page

13 describes the functions of the SCB LEDs.

Table 9: Switch Control Board LEDs

DescriptionStateColorLabel

FABRIC ACTIVE

FABRIC ONLY

Fabric is in active mode.On steadilyGreen

SCB operates in fabric-only mode.On steadilyGreen

SCB operates in fabric/control board mode.Off

OK/FAIL

SCB is online.On steadilyGreen

SCB is offline.Off

SCB has failed.On steadilyRed

Host Subsystem ■ 13

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MX240 Ethernet Services Router Hardware Guide

Routing Engine

The Routing Engine is an Intel-based PC platform that runs JUNOS software. Software processes that run on the Routing Engine 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.

You can install one or two Routing Engines in the router. The Routing Engines install into the front of the chassis in horizontal slots in the SCBs labeled 0 and 1/0. Each Routing Engine must be installed directly into an SCB. A USB port on the Routing Engine accepts a USB memory card that allows you to load JUNOS software.

If two Routing Engines are installed, one functions as the master and the other acts as the backup. If the master Routing Engine fails or is removed and the backup is configured appropriately, the backup takes over as the master. The Backup Routing Engine is hot-insertable and hot-removable.

The MX240 router supports the RE-S-1300-2048 Routing Engine and the RE-S-2000-4096 Routing Engine. Both Routing Engines have the same ports and LEDs on the faceplate.

NOTE: If two Routing Engines are installed, they must both be the same hardware version.

Figure 9: Routing Engine

14 ■ Host Subsystem

Routing Engine Components

Each Routing Engine (shown in Figure 9 on page 14) consists of the following components:

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Chapter 2: Hardware Components

■ CPU—Runs JUNOS software to maintain the router's routing tables and routing

protocols. It has a Pentium-class processor.

■ DRAM—Provides storage for the routing and forwarding tables and for other

Routing Engine processes.

■ USB port—Provides a removable media interface through which you can install

the JUNOS software manually. (See Figure 10 on page 15.) JUNOS supports USB version 1.0.

Figure 10: USB Memory Device in a Routing Engine

■ CompactFlash card—Provides primary storage for software images, configuration

files, and microcode. The CompactFlash card is fixed and is inaccessible from outside the router.

■ Hard disk—Provides secondary storage for log files, memory dumps, and

rebooting the system if the CompactFlash card fails.

■ Management ports—Each Routing Engine 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 interface ports are labelled AUX, CONSOLE, and

ETHERNET.

■ EEPROM—Stores the serial number of the Routing Engine.

■ Reset button—Reboots the Routing Engine when pressed.

■ Online/Offline button—Takes the Routing Engine online or offline when pressed.

■ Extractor clips—Used for inserting and extracting the Routing Engine.

■ Captive screws—Secure the Routing Engine in place.

NOTE: For specific information about Routing Engine components (for example, the amount of DRAM), issue the show chassis routing-engine command.

Each Routing Engine has four LEDs that indicate its status. The LEDs, labeled MASTER,

HDD, ONLINE, and FAIL, are located directly on the faceplate of the Routing Engine.

Table 10 on page 16 describes the functions of the Routing Engine LEDs.

Host Subsystem ■ 15

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MX240 Ethernet Services Router Hardware Guide

Table 10: Routing Engine LEDs

DescriptionStateColorLabel

MASTER

HDD

ONLINE

FAIL

Green

blinking

Blinking

On steadily

Routing Engine is the Master.On steadilyBlue

Hard disk is functioning normally.Green

Routing Engine is transitioning online.

Routing Engine is functioning normally.

Routing Engine has failed.On steadilyRed

Routing Engine Interface Ports

Three Routing Engine ports connect the Routing Engine to one or more external devices on which system administrators can issue JUNOS command-line interface (CLI) commands to manage the router (see Figure 9 on page 14).

The ports with the indicated labels function as follows:

■

AUX—Connects the Routing Engine to a laptop, modem, or other auxiliary device

through a serial cable with an RJ-45 connector.

■

CONSOLE—Connects the Routing Engine to a system console through a serial

cable with an RJ-45 connector.

■

ETHERNET—Connects the Routing Engine 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 top 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 light green when traffic is passing through the port.

16 ■ Host Subsystem

For information about the pinouts for the connectors, see “Cable Connector Pinouts” on page 185.

Routing Engine Boot Sequence

The Routing Engine boots from the storage media in this order: the USB device (if present), then the CompactFlash card, then the hard disk, then the LAN.

If the Routing Engines are configured for nonstop routing and graceful switchover, the backup Routing Engine automatically synchronizes its configuration and state with the master Routing Engine. Any update to the master Routing Engine state is replicated on the backup Routing Engine. If the backup Routing Engine assumes mastership, packet forwarding continues through the router without interruption. For more information about graceful switchover, see the JUNOS High Availability Configuration Guide.

Page 45

Cable Management System

The cable management system (see Figure 11 on page 17 and Figure 12 on page 17) consists of plastic dividers located on the left and right sides of each DPC, SCB, and multifunction slot. The cable management system allows you to route the cables outside the router and away from the DPCs, SCBs, and Routing Engines.

Figure 11: Cable Management System

Chapter 2: Hardware Components

Craft Interface

Figure 12: Cable Management System Installed on the Router

The craft interface allows you to view status and troubleshooting information at a glance and to perform many system control functions. It is hot-insertable and hot-removable. The craft interface is located on the front of the router above the DPC card cage and contains the following components:

■ Alarm LEDs and Alarm Cutoff/Lamp Test Button on page 18

■ Host Subsystem LEDs on page 19

■ Power Supply LEDs on page 19

■ DPC LEDs on page 20

Cable Management System ■ 17

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MX240 Ethernet Services Router Hardware Guide

■ SCB LEDs on page 20

■ Fan LEDs on page 20

■ Alarm Relay Contacts on page 21

Figure 13: Front Panel of the Craft Interface

NOTE: At least one SCB must be installed in the router for the craft interface to obtain power.

Alarm LEDs and Alarm Cutoff/Lamp Test Button

Two large alarm LEDs are located at the upper right of the craft interface (see Figure 13 on page 18). The circular red LED lights to indicate a critical condition that can result in a system shutdown. The triangular yellow LED lights to indicate 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, as described in “Alarm Relay Contacts” on page 21.

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.

Table 11 on page 19 describes the alarm LEDs and alarm cutoff button in more detail.

18 ■ Craft Interface

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Table 11: Alarm LEDs and Alarm Cutoff/Lamp Test Button

DescriptionStateColorShape

Chapter 2: Hardware Components

Host Subsystem LEDs

On steadilyRed

On steadilyYellow

––

Critical alarm LED—Indicates a critical condition that can cause the router to stop functioning. Possible causes include component removal, failure, or overheating.

Warning alarm LED—Indicates a serious but nonfatal error condition, such as a maintenance alert or a significant increase in component temperature.

Alarm cutoff/lamp test button—Deactivates red and yellow alarms. Causes all LEDs on the craft interface to light (for testing) when pressed and held.

Each host subsystem has three LEDs, located on the upper left of the craft interface, that indicate its status. The LEDs labeled RE0 show the status of the Routing Engine in slot 0 and the SCB in slot 0. The LEDs labeled RE1 show the status of the Routing Engine and SCB in slot 1/0Table 12 on page 19 describes the functions of the host subsystem LEDs.

Table 12: Host Subsystem LEDs

DescriptionStateColorLabel

Power Supply LEDs

MASTER

ONLINE

OFFLINE

Host is functioning as the master.On steadilyGreen

Host is online and is functioning normally.On steadilyGreen

Host is installed but the Routing Engine is offline.On steadilyRed

Host is not installed.Off

Each power supply has two LEDs on the craft interface that indicate its status. The LEDs, labeled 0 through 3, are located on the upper left of the craft interface next to the PEM label. Table 13 on page 19 describes the functions of the power supply LEDs on the craft interface.

Table 13: Power Supply LEDs on the Craft Interface

DescriptionStateColorLabel

PEM

Power supply is functioning normally.On steadilyGreen

Power supply has failed or power input has failed.On steadilyRed

Craft Interface ■ 19

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MX240 Ethernet Services Router Hardware Guide

DPC LEDs

Each DPC has LEDs on the craft interface that indicate its status. The DPC LEDs, labeled 1/0,1, and 2, (1/0 shows status of either SCB1 or DPC0, depending on which component is installed in the slot), are located along the bottom of the craft interface.

Table 14: DPC LEDs

DescriptionStateColorLabel

SCB LEDs

FAIL

DPC is functioning normally.On steadilyGreen

DPC is transitioning online or offline.Blinking

The slot is not online.Off

DPC has failed.On steadilyRed

Each SCB has two LEDs on the craft interface that indicates its status. The SCB LEDs, labeled 0 and 1/0 (the multifunction slot1/0 can contain either SCB1 or DPC0), are located along the bottom of the craft interface. Table 15 on page 20 describes the functions of the SCB LEDs.

Table 15: SCB LEDs

DescriptionStateColorLabel

SCB: Fabric and control board functioning normally.On steadilyGreen

SCB is transitioning online or offline.Blinking

The slot is not online.Off

Fan LEDs

20 ■ Craft Interface

FAIL

SCB has failed.On steadilyRed

The fan LED is located on the top left of the craft interface. Table 16 on page 20 describes the functions of the fan LEDs.

Table 16: Fan LEDs

DescriptionStateColorLabel

FAN

Fan is functioning normally.On steadilyGreen

Fan has failed.On steadilyRed

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Alarm Relay Contacts

Chapter 2: Hardware Components

The craft interface has two alarm relay contacts for connecting the router to external alarm devices (see Figure 14 on page 21). 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.

Figure 14: Alarm Relay Contacts

Power Supplies

AC Power Supply

The MX240 router uses either AC or DC power supplies. You can configure the MX240 router with either one or two high-line (220 V) AC power supplies, two or four low-line (110 V) AC power supplies, or one or two DC power supplies. The power supplies connect to the midplane, which distributes the different output voltages produced by the power supplies to the router components, depending on their voltage requirements. Each power supply is cooled by its own internal cooling system.

Redundant power supplies are hot-removable and hot-insertable. When you remove a power supply from a router that uses a nonredundant power supply configuration, the router might shut down depending on your configuration.

CAUTION: The router cannot be powered from AC and DC power supplies simultaneously.

NOTE: Routers configured with only one or two power supplies are shipped with a blank panel installed over the power supply slots that are not populated.

Each AC power supply weighs approximately 5.0 lb (2.3 kg) and consists of one AC appliance inlet, one AC switch, a fan, and LEDs to monitor the status of the power supply. Figure 15 on page 22 shows the power supply.

Each inlet requires a dedicated AC power feed and a dedicated facility circuit breaker. We recommend that you use a minimum 15 A (250 VAC) facility circuit breaker, or as required by local code. For information about connecting the router to power, see “Connecting Power to an AC-Powered Router” on page 54.

Power Supplies ■ 21

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MX240 Ethernet Services Router Hardware Guide

Figure 15: AC Power Supply

WARNING: The router is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal (sized for UNC 1/4-20 ground lugs) provided on the chassis in addition to the grounding pin of the power supply cord. This separate protective earthing terminal must be permanently connected to earth.

In the high-line (220 V) AC power configuration, the MX240 router contains one or two AC power supplies, located horizontally at the rear of the chassis in slots PEM0 and PEM2 (left to right) (see Figure 3 on page 7). The high-line configuration requires one power supply, with the second power supply providing redundancy. Each AC power supply provides power to all components in the router. When two power supplies are present, they share power almost equally within a fully populated system. If one power supply fails or is removed, the remaining power supply assumes the entire electrical load without interruption. One power supply can provide the maximum configuration with full power for as long as the router is operational.

In the low-line (110 V) AC power configuration, the MX240 router contains either two AC power supplies (nonredundant), located horizontally at the rear of the chassis in slots PEM0 and PEM1 (left to right); or four AC power supplies (redundant), located in slots PEM0 through PEM3 (left to right) (see Figure 2 on page 6). The low-line configuration requires two power supplies, and the third and fourth power supplies provide redundancy. Each AC power supply provides power to all components in the router. When two power supplies are present, they share power almost equally within a fully populated system. If one power supply in a redundant configuration fails or is removed, the remaining power supplies assume the entire electrical load without interruption. Two power supplies provide the maximum configuration with full power for as long as the router is operational.

AC Power Supply LEDs

Each AC power supply faceplate contains three LEDs that indicate the status of the power supply (see Table 17 on page 23). The power supply status is also reflected in two LEDs on the craft interface (see Table 13 on page 19). In addition, a power supply failure triggers the red alarm LED on the craft interface.

22 ■ Power Supplies

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Table 17: AC Power Supply LEDs

Chapter 2: Hardware Components

DescriptionStateColorLabel

AC OK

DC OK

PS FAIL

DC Power Supply

AC power input voltage is below 78 VAC.OffAmber

AC power input voltage is within 78–264 VAC.OnGreen

OffGreen

DC power outputs generated by the power supply are not within the normal operating ranges.

DC power outputs generated by the power supply are within the normal operating ranges.

Power supply is functioning normally.OffRed

Power supply is not functioning normally and its output voltage is out of regulation limits. Check AC OK and DC OK LEDs for more information.

Each DC power supply has a single DC input (–48 VDC and return) that requires a dedicated circuit breaker. We recommend that you use a minimum 40 A facility circuit breaker, or as required by local code.

Figure 16: DC Power Supply

For information about site power preparations, see “Power Guidelines, Requirements, and Specifications” on page 165. For information about connecting the router to power, see “Connecting Power to a DC-Powered Router” on page 56. For DC power electrical specifications, see “DC Power System Electrical Specifications” on page 167.

DC Power Supply Configurations for the MX240 Router

In the DC power configuration, the router contains either one or two DC power supplies (see Figure 16 on page 23) located at the rear of the chassis in slots PEM0

Power Supplies ■ 23

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MX240 Ethernet Services Router Hardware Guide

and PEM2 (left to right). You can upgrade your DC power system from one to two power supplies. A single DC power supply provides power to all components.

One DC power supply is required. A second DC power supply provides redundancy. If a DC power supply in a redundant configuration fails, the redundant power supply takes over without interruption.

DC Power Supply LEDs

Each DC power supply faceplate contains three LEDs that indicate the status of the power supply (see Table 18 on page 24). The power supply status is also reflected in two LEDs on the craft interface (see Table 13 on page 19). In addition, a power supply failure triggers the red alarm LED on the craft interface.

NOTE: An SCB must be present for the PWR OK LED to go on.

Table 18: DC Power Supply LEDs

PWR OK

BRKR ON

Green

INPUT OK

OffGreen

OnAmber

Cooling System

The cooling system consists of the following components:

DescriptionStateColorLabel

Power supply is not functioning normally. Check the INPUT OK LED for more information.

Power supply is functioning normally.On

The main output voltage is out of range (lower limit: 37.5 V to 39.5 V; upper limit:

72.5 V to 76 V).

DC power supply circuit breaker is turned off.OffGreen

DC power input is present and the DC power supply circuit breaker is turned on.On

DC input to the PEM is not present.OffGreen

DC input is present and is connected in correct polarity.On

DC input is present, but not in valid operating range or connected in reverse polarity.

24 ■ Cooling System

■ Fan tray

■ Air filter

The cooling system components work together to keep all router components within the acceptable temperature range (see Figure 17 on page 25, Figure 18 on page 25, and Figure 19 on page 26). The router has one fan tray and one air filter that install vertically in the rear of the router. The fan tray contains three fans.

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Chapter 2: Hardware Components

The air intake to cool the chassis is located on the side of the chassis next to the air filter. Air is pulled through the chassis toward the fan tray, where it is exhausted out the side of the system. The air intake to cool the power supplies is located in the front of the router above the craft interface. The exhaust for the power supplies is located on the rear bulkhead power supplies.

Figure 17: Airflow Through Chassis

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. If the ambient maximum temperature specification is exceeded and the system cannot be adequately cooled, the Routing Engine shuts down the system by disabling output power from each power supply.

Figure 18: Fan Tray

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Figure 19: Air Filter

26 ■ Cooling System

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Part 2

Setting Up the Router

■ Preparing the Site for Router Installation on page 29

■ Installation Overview on page 35

■ Unpacking the Router on page 37

■ Installing the Mounting Hardware on page 41

■ Installing the Router on page 45

■ Connecting the Router on page 49

■ Grounding and Providing Power to the Router on page 53

■ Configuring JUNOS Software on page 61

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28 ■ Setting Up the Router

Page 57

Chapter 3

Preparing the Site for Router Installation

This chapter describes how to prepare your site for installation of the MX240 router. It discusses the following topics:

■ Site Preparation Checklist on page 29

■ Cabinet Requirements on page 30

■ Rack Requirements on page 31

■ Clearance Requirements for Airflow and Hardware Maintenance on page 32

Site Preparation Checklist

The checklist in Table 19 on page 29 summarizes the tasks you must perform when preparing a site for router installation.

Table 19: Site Preparation Checklist

DatePerformed ByFor More InformationItem or Task

Verify that environmental factors such as temperature and humidity do not exceed router tolerances.

Select the type of rack or cabinet.

Plan rack or cabinet location, including required space clearances.

If a rack is used, secure rack to floor and building structure.

Acquire cables and connectors.

Locate sites for connection of system grounding.

Measure distance between external power sources and router installation site.

“Router Environmental Specifications” on page 163

“Cabinet Requirements” on page 30, “Rack Requirements” on page 31

“Cabinet Size and Clearance Requirements” on page 30, “Rack Size and Strength” on page 31, “Clearance Requirements for Airflow

and Hardware Maintenance” on page 32

“Connection to Building Structure” on page 32

“Chassis Grounding Specifications” on page 165

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Table 19: Site Preparation Checklist (continued)

DatePerformed ByFor More InformationItem or Task

Calculate the optical power budget and optical power margin.

“Calculating Power Budget for Fiber-Optic Cable” on page 181

Cabinet Requirements

The router can be installed in a standard 482-mm wide (or larger) enclosed cabinet. The following sections describe cabinet requirements:

■ Cabinet Size and Clearance Requirements on page 30

■ Cabinet Airflow Requirements on page 30

Cabinet Size and Clearance Requirements

The minimum-sized cabinet that can accommodate the router is 482-mm wide and 800-mm deep. A cabinet larger than the minimum requirement provides better airflow and reduces the chance of overheating. To accommodate a single router, the cabinet must be at least 13 U high. If you provide adequate cooling air and airflow clearance, you can stack several routers in a cabinet that has sufficient usable vertical space. Each router requires 5 U.

The minimum total clearance inside the cabinet is 30.7 in. between the inside of the front door and the inside of the rear door.

Cabinet Airflow Requirements

When you mount the router in a cabinet, you must ensure that ventilation through the cabinet is sufficient to prevent overheating. Consider the following requirements to when planning for chassis cooling:

■ Ensure that the cool air supply you provide through the cabinet can adequately

dissipate the thermal output of the router.

■ Ensure that the cabinet allows the chassis hot exhaust air to exit from the cabinet

without recirculating into the router. An open cabinet (without a top or doors) that employs hot air exhaust extraction from the top allows the best airflow through the chassis. If the cabinet contains a top or doors, perforations in these elements assist with removing the hot air exhaust. For an illustration of chassis airflow, see Figure 17 on page 25.

■ Install the router as close as possible to the front of the cabinet so that the cable

management system just clears the inside of the front door. This maximizes the clearance in the rear of the cabinet for critical airflow.

■ Route and dress all cables to minimize the blockage of airflow to and from the

chassis.

30 ■ Cabinet Requirements

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Rack Requirements

The router can be installed in a rack. Many types of racks are acceptable, including four-post (telco) racks and open-frame racks. An example of an open-frame rack appears in Figure 20 on page 32.

The following sections describe rack requirements:

■ Rack Size and Strength on page 31

■ Spacing of Mounting Bracket Holes on page 32

■ Connection to Building Structure on page 32

Rack Size and Strength

The router is designed for installation in a 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the

Electronics Industry Association (http://www.eia.org).

Chapter 3: Preparing the Site for Router Installation

With the use of adapters, the router is designed to fit into a 600-mm-wide rack, as defined in the four-part Equipment Engineering (EE); European telecommunications standard for equipment practice (document numbers ETS 300 119-1 through 119-4) published by the European Telecommunications Standards Institute (http://www.etsi.org). Use approved wing devices to narrow the opening between the rails.

The rack rails must be spaced widely enough to accommodate the router chassis's external dimensions: 8.71 in. (22.1 cm) high, 24.5 in. (62.2 cm) deep, and

17.45 in. (44.3 cm) wide. The spacing of rails and adjacent racks must also allow for the clearances around the router and rack that are specified in “Clearance Requirements for Airflow and Hardware Maintenance” on page 32.

In an open-frame rack, center-mounting the chassis in the rack is preferable to front-mounting because the more even distribution of weight provides greater stability.

For instructions about installing the mounting hardware, see “Installing the Mounting Hardware” on page 41.

The chassis height of 8.71 in. (22.1 cm) is approximately 5 U. A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association. You can stack several MX240 routers in a rack that has sufficient usable vertical space.

The rack must be strong enough to support the weight of the fully configured router, up to 128 lb (58.1 kg). If you stack multiple fully configured routers in one rack, it must be capable of supporting the combined weight of the routers.

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Figure 20: Typical Open-Frame Rack

Spacing of Mounting Bracket Holes

The router can be mounted in any rack that provides holes or hole patterns spaced at 1 U (1.75 in.) increments. The mounting brackets used to attach the chassis to a rack are designed to fasten to holes spaced at those distances.

Connection to Building Structure

Always secure the rack to the structure of the building. If your geographical area is subject to earthquakes, bolt the rack to the floor. For maximum stability, also secure the rack to ceiling brackets. For more information, see “Rack-Mounting Requirements and Warnings” on page 133.

Clearance Requirements for Airflow and Hardware Maintenance

When planning the installation site, allow sufficient clearance around the rack (see Figure 21 on page 33):

■ For the cooling system to function properly, the airflow around the chassis must

be unrestricted. Allow at least 6 in. (15.2 cm) of clearance between side-cooled

32 ■ Clearance Requirements for Airflow and Hardware Maintenance

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Chapter 3: Preparing the Site for Router Installation

routers. Allow 2.8 in. (7 cm) between the side of the chassis and any non-heat-producing surface such as a wall.

■ For service personnel to remove and install hardware components, there must

be adequate space at the front and back of the router. At least 24 in. (61 cm) is required both in front of and behind the router. NEBS GR-63 recommends that you allow at least 30 in. (76.2 cm) in front of the router.

Figure 21: Chassis Dimensions and Clearance Requirements

Clearance Requirements for Airflow and Hardware Maintenance ■ 33

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34 ■ Clearance Requirements for Airflow and Hardware Maintenance

Page 63

Chapter 4

Installation Overview

After you have prepared your installation site as described in “Preparing the Site for Router Installation” on page 29, you are ready to unpack and install the router. It is important to proceed through the installation process in the following order:

1. Review the safety guidelines explained in “Safety and Regulatory Compliance

Information” on page 125.

2. Follow the instructions in this chapter to unpack the router and verify that the

parts are received.

3. Install the mounting hardware as described in “Installing the Mounting

Hardware” on page 41.

4. Install the router as described in “Installing the Router” on page 45 or “Installing

the Router Without a Mechanical Lift” on page 187.

5. Connect cables to external devices as described in “Connecting the

Router” on page 49.

6. Connect the grounding cable as described in “Grounding the Router” on page 54.

7. Connect the power cables as described in “Connecting Power to an AC-Powered

Router” on page 54 or “Connecting Power to a DC-Powered Router” on page 56.

8. Power on the router as described in “Powering On an AC-Powered

Router” on page 55 or “Powering On a DC-Powered Router” on page 58.

9. Perform the initial system startup as described in “Configuring JUNOS

Software” on page 61.

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36 ■

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Chapter 5

Unpacking the Router

This chapter describes how to prepare to install the router. It discusses the following topics:

■ Tools and Parts Required on page 37

■ Unpacking the Router on page 37

■ Verifying Parts Received on page 38

Tools and Parts Required

To unpack the router and prepare for installation, you need the following tools:

■ Phillips (+) screwdriver, number 2

■ 1/2-in. or 13-mm open-end or socket wrench to remove bracket bolts from the

shipping pallet

■ Blank panels to cover any slots not occupied by a component

Unpacking the Router

The router is shipped in a wooden crate. A wooden pallet forms the base of the crate. The router chassis is bolted to this pallet. Quick Start installation instructions and a cardboard accessory box are also included in the shipping crate.

The shipping container measures 21 in. (53.3 cm) high, 23.5 in. (60.0 cm) wide, and

32.5 in. (82.5 cm) deep. The total weight of the container containing the router and accessories can range from 93 lb (42.2 kg) to 169 lb (76.7 kg).

NOTE: The router is maximally protected inside the shipping crate. Do not unpack it until you are ready to begin installation.

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To unpack the router (see Figure 22 on page 38):

1. Move the shipping crate to a staging area as close to the installation site as

possible, where you have enough room to remove the components from the chassis. While the chassis is bolted to the pallet, you can use a forklift or pallet jack to move it.

2. Position the shipping crate with the arrows pointing up.

3. Open all the latches on the shipping crate.

4. Remove the front door of the shipping crate cover and set it aside.

5. Slide the remainder of the shipping crate cover off the pallet.

6. Remove the foam covering the top of the router.

7. Remove the accessory box and the Quick Start installation instructions.

8. Verify the parts received against the lists in Table 20 on page 39 and

Table 21 on page 39.

9. Remove the vapor corrosion inhibitor (VCI) packs attached to the pallet, being

careful not to break the VCI packs open.

10. To remove the brackets holding the chassis on the pallet, use a 1/2-in. socket

wrench and a number 2 Phillips screwdriver to remove the bolts and screws from the brackets.

11. Store the brackets and bolts inside the accessory box.

12. Save the shipping crate cover, pallet, and packing materials in case you need to

move or ship the router at a later time.

13. To proceed with the installation, see “Installing the Router Using a Lift” on page

46 or “Installing the Router Without a Mechanical Lift” on page 187.

Figure 22: Contents of the Shipping Crate

Verifying Parts Received

A packing list is included in each shipment. Check the parts in the shipment against the items on the packing list. The packing list specifies the part numbers and descriptions of each part in your order.

38 ■ Verifying Parts Received

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Chapter 5: Unpacking the Router

If any part is missing, contact a customer service representative.

A fully configured router contains the router chassis with installed components, listed in Table 20 on page 39, and an accessory box, which contains the parts listed in Table 21 on page 39. The parts shipped with your router can vary depending on the configuration you ordered.

Table 20: Parts List for a Fully Configured Router

QuantityComponent

rack-mounting brackets

Blank panels for slots without components installed

1Chassis, including midplane, craft interface, and

Up to 3DPCs

1 or 2Routing Engines

1 or 2SCBs

1 or 2DC power supplies

1 or 2AC power supplies (220 V)

2 or 4AC power supplies (110 V)

1Fan tray

1Air filter

1Air filter tray

1Quick start installation instructions

1Mounting shelf

One blank panel for each slot not occupied by a component

Table 21: Accessory Box Parts List

the serial port

connect the router alarms

QuantityPart

22Screws to mount chassis and small shelf

5DC power terminal Lugs, 6-AWG

1RJ-45-to-DB-9 serial cable to connect the router through

2Cable manager brackets

2Terminal block plug, 3–pole, 5.08 mm spacing, 12A, to

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Table 21: Accessory Box Parts List (continued)

QuantityPart

1Label, accessories contents, MX240

1USB flash drive with JUNOS software

1Read me first document

1Affidavit for T1 connection

1Juniper Networks Product Warranty

1End User License Agreement

1Document sleeve

23 in. x 5 in. pink bag

Category 5E, 15'

29 in. x 12 in. pink bag, ESD

1Accessory box, 19 in. x 12 in. x 3 in.

1Ethernet cable, RJ-45/RJ-45, 4-pair stranded UTP,

1ESD wrist strap with cable

40 ■ Verifying Parts Received

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Chapter 6

Installing the Mounting Hardware

The router can be installed in a four-post rack or cabinet or an open-frame rack. Install the mounting hardware on the rack before installing the router.

After the mounting hardware is installed, proceed to “Installing the Router” on page 45 or “Installing the Router Without a Mechanical Lift” on page 187, depending on your type of installation.

This chapter describes the procedures for installing the mounting hardware:

■ Installing the Mounting Hardware for a Rack or Cabinet on page 41

■ Moving the Mounting Brackets for Center-Mounting the Router on page 43

Installing the Mounting Hardware for a Rack or Cabinet

Install the mounting shelf, which is included in the shipping container, before installing the router. We recommend that you install the mounting shelf because the weight of a fully loaded chassis can be up to 128 lb (58.1 kg).

Table 22 on page 41 specifies the holes in which you insert cage nuts and screws to install the mounting hardware required (an X indicates a mounting hole location). The hole distances are relative to one of the standard U divisions on the rack. The bottom of all mounting shelves is at 0.02 in. above a U division.

Table 22: Four-Post Rack or Cabinet Mounting Hole Locations

Mounting ShelfDistance Above U DivisionHole

1.14 U2.00 in. (5.1 cm)4

0.86 U1.51 in. (3.8 cm)3

0.50 U0.88 in. (2.2 cm)2

0.14 U0.25 in. (0.6 cm)1

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To install the mounting shelf on the front rails of a four-post rack or cabinet, or the rails of an open-frame rack:

1. If needed, install cage nuts in the holes specified in Table 22 on page 41.

2. On the back of each rack rail, partially insert a mounting screw into the lowest

hole specified in Table 22 on page 41.

3. Install the mounting shelf on the back of the rack rails. Rest the bottom slot of

each flange on a mounting screw.

4. Partially insert the remaining screws into the open holes in each flange of the

mounting shelf (see Figure 23 on page 42 or Figure 24 on page 43).

5. Tighten all the screws completely.

Figure 23: Installing the Front Mounting Hardware for a Four-Post Rack or Cabinet

42 ■ Installing the Mounting Hardware for a Rack or Cabinet

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Chapter 6: Installing the Mounting Hardware

Figure 24: Installing the Mounting Hardware for an Open-Frame Rack

Moving the Mounting Brackets for Center-Mounting the Router

Two removable mounting brackets are attached to the mounting holes closest to the front of the chassis. You can move the pair of brackets to another position on the side of the chassis for center-mounting the router.

To move the mounting brackets from the front of the chassis toward the center of the chassis:

1. Remove the three screws at the top and center of the bracket.

2. Pull the top of the bracket slightly away from the chassis. The bottom of the

bracket contains a tab that inserts into a slot in the chassis.

3. Pull the bracket away from the chassis so that the tab is removed from the chassis

slot.

4. Insert the bracket tab into the slot in the bottom center of the chassis.

5. Align the bracket with the two mounting holes located toward the top center of

the chassis.

There is no mounting hole in the center of the chassis that corresponds to the hole in the center of the bracket.

6. Insert the two screws at the top of the bracket and tighten each partially.

Two screws are needed for mounting the bracket on the center of the chassis. You do not need the third screw.

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7. Tighten the two screws completely.

8. Repeat the procedure for the other bracket.

44 ■ Moving the Mounting Brackets for Center-Mounting the Router

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Chapter 7

Installing the Router

This chapter discusses the following router installation topics:

■ Safety Requirements, Warnings, and Guidelines on page 45

■ Installing the Router Using a Mechanical Lift on page 45

Safety Requirements, Warnings, and Guidelines

To avoid harm to yourself or the router as you install and maintain it, follow the guidelines for working with and near electrical equipment, as well as the safety procedures for working with Internet routers. For a discussion of how to make the installation site a safe environment, see “Preparing the Site for Router Installation” on page 29. For a list of safety warnings, see “Safety and Regulatory Compliance Information” on page 125 and particularly “Electrical Safety Guidelines and Warnings” on page 144. However, providing an exhaustive set of guidelines for working with electrical equipment is beyond the scope of this manual.

Installing the Router Using a Mechanical Lift

Because of the router's size and weight—up to 128 lb (58.1 kg) depending on the configuration—we strongly recommend that you install the router using a mechanical lift as described in “Installing the Router Using a Lift” on page 46. If you do not use a lift to install the router, see “Installing the Router Without a Mechanical Lift” on page 187 for complete instructions to install the router safely.

Before installing the router, prepare your site and review the guidelines in “Preparing the Site for Router Installation” on page 29. The “Site Preparation Checklist” on page 29 summarizes the tasks you must perform when preparing a site for router installation. You also need to unpack the router from the shipping container, as described in “Unpacking the Router” on page 37.

This section is divided into the following topics:

■ Tools Required on page 46

■ Installing the Router Using a Lift on page 46

Safety Requirements, Warnings, and Guidelines ■ 45

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Tools Required

To install the router, you need the following tools:

■ Mechanical lift

■ Phillips (+) screwdriver, number 2

Installing the Router Using a Lift

Before installing the router in the rack, read the safety information in “Chassis-Lifting Guidelines” on page 132. Remove the router from the shipping container as described in “Unpacking the Router” on page 37. Install the mounting hardware as described in “Installing the Mounting Hardware” on page 41.

CAUTION: Before front mounting the router in a rack, have a qualified technician verify that the rack is strong enough to support the router's weight and is adequately supported at the installation site.

To install the router using a lift (see Figure 25 on page 47):

1. Ensure that the rack is in its permanent location and is secured to the building.

Ensure that the installation site allows adequate clearance for both airflow and maintenance. For details, see “Preparing the Site for Router Installation” on page 29.

2. Load the router onto the lift, making sure it rests securely on the lift platform.

3. Using the lift, position the router in front of the rack or cabinet, centering it in

front of the mounting shelf.

4. Lift the chassis approximately 0.75 in. above the surface of the mounting shelf

and position it as close as possible to the shelf.

5. Carefully slide the router onto the mounting shelf so that the bottom of the chassis

and the mounting shelf overlap by approximately two inches.

6. Slide the router onto the mounting shelf until the mounting brackets contact the

rack rails. The shelf ensures that the holes in the mounting brackets of the chassis align with the holes in the rack rails.

7. Move the lift away from the rack.

8. Install a mounting screw into each of the open mounting holes aligned with the

rack, starting from the bottom.

9. Visually inspect the alignment of the router. If the router is installed properly in

the rack, all the mounting screws on one side of the rack should be aligned with the mounting screws on the opposite side and the router should be level.

46 ■ Installing the Router Using a Mechanical Lift

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Figure 25: Installing the Router in the Rack

Chapter 7: Installing the Router

NOTE: This illustration depicts the router being installed in an open-frame rack. For an illustration of the mounting hardware required for a four-post rack or cabinet, see Figure 23 on page 42.

Installing the Router Using a Mechanical Lift ■ 47

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48 ■ Installing the Router Using a Mechanical Lift

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Chapter 8

Connecting the Router

■ Tools and Parts Required on page 49

■ Connecting the Router to Management and Alarm Devices on page 49

■ Connecting DPC Cables on page 51

Tools and Parts Required

To connect the router to management devices and DPCs, you need the following tools and parts:

■ Phillips (+) screwdrivers, numbers 1 and 2

■ 2.5-mm flat-blade (–) screwdriver

■ 2.5-mm Phillips (+) screwdriver

■ Wire cutters

■ Electrostatic discharge (ESD) grounding wrist strap

Connecting the Router to Management and Alarm Devices

After you have installed the router into the rack, connect one or more external devices to the Routing Engine ports for management and service operations (see Figure 26 on page 49). For specifications for the cable accepted by the Routing Engine management ports, see “Routing Engine Interface Cable and Wire Specifications” on page 183.

Figure 26: Routing Engine Management Ports

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Figure 27: RJ-45 Cable Connector

To connect external devices to the Routing Engine management ports, perform the procedures described in the following sections:

■ Connecting to a Network for Out-of-Band Management on page 50

■ Connecting to a Management Console or Auxiliary Device on page 50

■ Connecting to an External Alarm-Reporting Device on page 50

Connecting to a Network for Out-of-Band Management

To connect the Routing Engine to a network for out-of-band management, connect an Ethernet cable with RJ-45 connectors to the ETHERNET port on the Routing Engine. One such cable is provided with the router. For cable specifications, see “Routing Engine Interface Cable and Wire Specifications” on page 183. Follow this procedure:

1. Turn off the power to the management device.

2. Plug one end of the Ethernet cable (Figure 27 on page 50 shows the connector)

into the ETHERNET port on the Routing Engine. Figure 26 on page 49 shows the external device ports on the Routing Engine.

3. Plug the other end of the cable into the network device.

Connecting to a Management Console or Auxiliary Device

To use a system console to configure and manage the Routing Engine, connect it to the appropriate CONSOLE port on the Routing Engine. To use a laptop, modem, or other auxiliary device, connect it to the AUX port on the Routing Engine. Both ports accept a cable with an RJ-45 connector. One serial cable with an RJ-45 connector and a DB-9 connector is provided with the router. If you want to connect a device to the CONSOLE port and another device to the AUX port, you must supply an additional cable. For cable specifications, see “Routing Engine Interface Cable and Wire Specifications” on page 183.

To connect a management console or auxiliary device:

1. Turn off the power to the console or auxiliary device.

2. Plug the RJ-45 end of the serial cable (Figure 27 on page 50 shows the connector)

into the AUX port or CONSOLE port on the Routing Engine. Figure 26 on page 49 shows the external device ports on the Routing Engine.

3. Plug the female DB-9 end into the device's serial port.

Connecting to an External Alarm-Reporting Device

To connect the router to external alarm-reporting devices, attach wires to the RED and YELLOW relay contacts on the craft interface. (See Figure 28 on page 51.) A

50 ■ Connecting the Router to Management and Alarm Devices

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system condition that triggers the red or yellow alarm LED on the craft interface also activates the corresponding alarm relay contact.

The terminal blocks that plug into the alarm relay contacts are supplied with the router. They accept wire of any gauge between 28-AWG and 14-AWG (0.08 and

2.08 mm2), which is not provided. Use the gauge of wire appropriate for the external device you are connecting.

To connect an external device to an alarm relay contact (see Figure 28 on page 51):

1. Prepare the required length of wire with gauge between 28-AWG and 14-AWG

(0.08 and 2.08 mm2).

2. While the terminal block is not plugged into the relay contact, use a 2.5-mm

flat-blade screwdriver to loosen the small screws on its side. With the small screws on its side facing left, insert wires into the slots in the front of the block based on the wiring for the external device. Tighten the screws to secure the wire.

3. Plug the terminal block into the relay contact, and use a 2.5-mm flat-blade

screwdriver to tighten the screws on the face of the block.

4. Attach the other end of the wires to the external device.

To attach a reporting device for the other kind of alarm, repeat the procedure.

Figure 28: Alarm Relay Contacts

Connecting DPC Cables

Connect the DPCs to the network by plugging in network cables. Follow this procedure (see Figure 29 on page 52, which shows a fiber-optic DPC):

1. Have ready a length of the type of cable used by the DPC. For cable specifications,

see the MX-series Ethernet Services Router DPC Guide.

2. If the cable connector port is covered by a rubber safety plug, remove the plug.

WARNING: Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected to a transceiver emit laser light that can damage your eyes.

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CAUTION: Do not leave a fiber-optic transceiver uncovered except when inserting or removing cable. The safety cap keeps the port clean and prevents accidental exposure to laser light.

3. Insert the cable connector into the cable connector port on the DPC faceplate.

NOTE: The XFP cages and optics on the DPC are industry standard parts that have limited tactile feedback for insertion of optics and fiber. You need to insert the optics and fiber firmly until the latch is securely in place.

4. Arrange the cable in the cable management system to prevent it from dislodging

or developing stress points. Secure the cable so that it is not supporting its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop in the cable management system. Placing fasteners on the loop helps to maintain its shape.

CAUTION: Avoid bending fiber-optic cable beyond its minimum bend radius. An arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose.

CAUTION: Do not let fiber-optic cable hang free from the connector. Do not allow fastened loops of cable to dangle, which stresses the cable at the fastening point.

Figure 29: Attaching a Cable to a DPC

52 ■ Connecting DPC Cables

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Chapter 9

Grounding and Providing Power to the Router

■ Tools and Parts Required on page 53

■ Grounding the Router on page 54

■ Connecting Power to an AC-Powered Router on page 54

■ Powering On an AC-Powered Router on page 55

■ Connecting Power to a DC-Powered Router on page 56

■ Powering On a DC-Powered Router on page 58

■ Powering Off the Router on page 59

Tools and Parts Required

To ground and provide power to the router, you need the following tools and parts:

■ Phillips (+) screwdrivers, numbers 1 and 2

■ 2.5-mm flat-blade (–) screwdriver

■ 3/8-in. nut driver or hexagonal-head external drive socket wrench, with a torque

range between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) tightening torque, for tightening nuts to terminal studs on each power supply (on a DC-powered router)

CAUTION: Do not substitute a metric nut driver or wrench. A tool that does not fit the nuts exactly can damage them. You must use a 3/8-in. tool.

■ Wire cutters

■ Electrostatic discharge (ESD) grounding wrist strap

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Grounding the Router

You ground the router by connecting a grounding cable to earth ground and then attaching it to the chassis grounding points using UNC 1/4-20 two screws. You must provide the grounding cables (the cable lugs are supplied with the router). For grounding cable specifications, see “Chassis Grounding Specifications” on page 165.

1. Verify that a licensed electrician has attached the cable lug provided with the

router to the grounding cable.

2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and

connect the strap to an approved site ESD grounding point. See the instructions for your site.

3. Ensure that all grounding surfaces are clean and brought to a bright finish before

grounding connections are made.

4. Connect the grounding cable to a proper earth ground.

5. Detach the ESD grounding strap from the site ESD grounding point.

6. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and

connect the strap to one of the ESD points on the chassis. For more information about ESD, see “Preventing Electrostatic Discharge Damage” on page 130.

7. Place the grounding cable lug over the grounding points on the upper rear of the

chassis. The bolts are sized for UNC 1/4-20 bolts.

8. Secure the grounding cable lug to the grounding points, first with the washers,

then with the screws.

9. Dress the grounding cable and verify that it does not touch or block access to

router components, and that it does not drape where people could trip on it.

Connecting Power to an AC-Powered Router

CAUTION: Do not mix AC and DC power supplies within the same router. Damage to the router might occur.

You connect AC power to the router by attaching power cords from the AC power sources to the AC appliance inlets located on the power supplies. The power cords are provided. For power cord specifications, see “AC Power Cord Specifications” on page 174.

To connect the AC power cords to the router for each power supply (see Figure 30 on page 55):

54 ■ Grounding the Router

1. Locate the power cords shipped with the router, which should have a plug

appropriate for your geographical location (see “AC Power Cord Specifications” on page 174).

2. Move the AC switch next to the appliance inlet on the power supply to the off

position (O).

3. Insert the power cord plug into an external AC power source receptacle.

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NOTE: Each power supply must be connected to a dedicated AC power feed and a dedicated external circuit breaker. We recommend that you use a 15 A (250 VAC) minimum, or as permitted by local code.

4. Dress the power cord appropriately. Verify that the power cord does not block

the air exhaust and access to router components, or drape where people could trip on it.

5. Repeat Step 1 through Step 4 for the remaining power supplies.

Figure 30: Connecting AC Power to the Router

Powering On an AC-Powered Router

To power on an AC-powered router:

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and

connect the strap to one of the ESD points on the chassis. For more information about ESD, see “Preventing Electrostatic Discharge Damage” on page 130.

2. Verify that the power supplies are fully inserted in the chassis.

3. Verify that the AC power cord is securely inserted into the appliance inlet.

4. Verify that an external management device is connected to one of the Routing

Engine ports (AUX, CONSOLE, or ETHERNET). For more information about connecting management devices, see “Connecting the Router to Management and Alarm Devices” on page 49.

5. Turn on the power to the external management device.

Switch the AC switch on each power supply to the on position (|) and observe the status LEDs on each power supply faceplate. If an AC power supply is correctly installed and functioning normally, the AC OK and DC OK LEDs light steadily, and the PS FAIL LED is not lit.

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If any of the status LEDs indicates that the power supply is not functioning normally, repeat the installation and cabling procedures described in “Replacing Power System Components” on page 112.

NOTE: After powering off a power supply, wait at least 60 seconds before turning it back on. After powering on a power supply, wait at least 60 seconds before turning it off.

If the system is completely powered off when you power on the power supply, the Routing Engine boots as the power supply completes its startup sequence. If the Routing Engine finishes booting and you need to power off the system again, first issue the CLI request system halt command.

After a power supply is powered on, it can take up to 60 seconds for status indicators—such as the status LEDs on the power supply and the show chassis command display—to indicate that the power supply is functioning normally. Ignore error indicators that appear during the first 60 seconds.

7. On the external management device connected to the Routing Engine, monitor

the startup process to verify that the system has booted properly.

Connecting Power to a DC-Powered Router

CAUTION: Do not mix AC and DC power supplies within the same router. Damage to the router might occur.

WARNING: Before performing the following procedure, ensure that power is removed from the DC circuit. To ensure that all power is off, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the off position, and tape the switch handle of the circuit breaker in the off position.

You connect DC power to the router by attaching power cables from the external DC power sources to the terminal studs on the power supply faceplates. You must provide the power cables (the cable lugs are supplied with the router). For power cable specifications, see “DC Power Cable Specifications” on page 170.

To connect the DC source power cables to the router for each power supply:

1. Switch off the dedicated facility circuit breakers. Ensure that the voltage across

the DC power source cable leads is 0 V and that there is no chance that the cable leads might become active during installation.

Switch the circuit breaker on the power supply faceplate to the OFF position.

3. Remove the clear plastic cover protecting the terminal studs on the faceplate.

4. Verify that the DC power cables are correctly labeled before making connections

to the power supply. In a typical power distribution scheme where the return is

56 ■ Connecting Power to a DC-Powered Router

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Chapter 9: Grounding and Providing Power to the Router

connected to chassis ground at the battery plant, you can use a multimeter to verify that the ohm output of the –48V and RTN DC cables to chassis ground. . The cable with very large resistance (indicating an open circuit) to chassis ground will be –48V and the cable with very low resistance (indicating a closed circuit) to chassis ground will be RTN.

CAUTION: You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and (–) to indicate their polarity. There is no standard color coding for DC power cables. The color coding used by the external DC power source at your site determines the color coding for the leads on the power cables that attach to the terminal studs on each power supply.

5. Remove the nuts and washers from the terminal studs. (Use a 3/8-in. nut driver

or socket wrench.)

6. Secure each power cable lug to the terminal studs, first with the flat washer, then

with the nut (see Figure 31 on page 58). Apply between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm) of torque to each nut. .(Use a 3/8-in. nut driver or socket wrench.)

■

Secure the positive (+) DC source power cable lug to the RTN (return)

terminal.

■

Secure the negative (–) DC source power cable lug to the –48V (input)

terminal.

NOTE: The DC power supply in PEM0 must be powered by dedicated power feeds derived from feed A, and the DC power supply in PEM2 must be powered by dedicated power feeds derived from feed B. This configuration provides the commonly deployed

A/B feed redundancy for the system.

7. Replace the clear plastic cover over the terminal studs on the faceplate.

8. Verify that the power cables are connected correctly, that they are not touching

or blocking access to router components, and that they do not drape where people could trip on them.

9. If you are installing two power supplies, repeat Steps 2 through 8 for the other

power supply.

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Figure 31: Connecting DC Power to the Router

Powering On a DC-Powered Router

CAUTION: Do not mix AC and DC power supplies within the same router. Damage to the router might occur.

To power on a DC-powered router:

1. Verify that an external management device is connected to one of the Routing

Engine ports (AUX, CONSOLE, or ETHERNET). For more information about connecting management devices, see “Connecting the Router to Management and Alarm Devices” on page 49.

2. Turn on the power to the external management device.

3. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and

connect the strap to one of the ESD points on the chassis. For more information about ESD, see “Preventing Electrostatic Discharge Damage” on page 130.

4. Verify that the power supplies are fully inserted in the chassis.

5. Verify that the source power cables are connected to the appropriate terminal:

the positive (+) source cable to the return terminal (labeled RTN) and the negative (–) source cable to the input terminal (labeled –48V).

58 ■ Powering On a DC-Powered Router

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6. Switch on the dedicated facility circuit breakers to provide power to the DC

power cables.

Check the INPUT OK LED is lit steadily green to verify that power is present.

8. If power is not present:

■ Verify that the fuse is installed correctly and turn on the breaker at the battery

distribution fuse board or fuse bay.

■ Check the voltage with a meter at the terminals of the power supply for

correct voltage level and polarity.

Switch the circuit breaker on each of the power supplies to the ON position — and observe the status LEDs on each power supply faceplate. If a DC power supply is correctly installed and functioning normally, the PWR OK, BRKR ON, and INPUT OK LEDs light green steadily.

If any of the status LEDs indicates that the power supply is not functioning normally, repeat the installation and cabling procedures described in “Replacing Power System Components” on page 112.

NOTE: After powering off a power supply, wait at least 60 seconds before turning it back on. After powering on a power supply, wait at least 60 seconds before turning it off.

10. On the external management device connected to the Routing Engine, monitor

the startup process to verify that the system has booted properly.

Powering Off the Router

If you need to power off the router:

1. On the external management device connected to the Routing Engine, issue the

request system halt both-routing-engines operational mode command. The

command shuts down the Routing Engines cleanly, so their state information is preserved. (If the router contains only one Routing Engine, issue the request

system halt command.)

user@host> request system halt both-routing-engines

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Wait until a message appears on the console confirming that the operating system has halted. For more information about the command, see the JUNOS System Basics and Services Command Reference.

2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and

connect the strap to one of the ESD points on the chassis. For more information about ESD, see “Preventing Electrostatic Discharge Damage” on page 130.

3. On an AC-powered router, switch the AC switch on each power supply to the off

position (O). On a DC-powered router, switch the circuit breaker on each power supply to the off position (OFF).

60 ■ Powering Off the Router

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Chapter 10

Configuring JUNOS Software

■ Configuring the JUNOS Software on page 61

Configuring the JUNOS Software

The router is shipped with the JUNOS software preinstalled and ready to be configured when the router is powered on. There are three copies of the software: one on a CompactFlash card in the Routing Engine, one on a hard disk in the Routing Engine, and one on a USB flash drive that can be inserted into the slot in the Routing Engine faceplate.

When the router boots, it first attempts to start the image on the USB flash drive. If a USB flash drive is not inserted into the Routing Engine or the attempt otherwise fails, the router next tries the CompactFlash card (if installed), and finally the hard disk.

You configure the router by issuing JUNOS command-line interface (CLI) commands, either on a console device attached to the CONSOLE port on the Routing Engine, or over a telnet connection to a network connected to the ETHERNET port on the Routing Engine.

Gather the following information before configuring the router:

■ Name that the router will use on the network

■ Domain name that the router will use

■ IP address and prefix length information for the Ethernet interface

■ IP address of a default router

■ IP address of a DNS server

■ Password for the root user

This procedure connects the router to the network but does not enable it to forward traffic. For complete information about enabling the router to forward traffic, including examples, see the JUNOS software configuration guides.

To configure the software:

1. Verify that the router is powered on, as described in “Powering On an AC-Powered

Router” on page 55 or “Powering On a DC-Powered Router” on page 58.

2. Log in as the root user. There is no password.

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3. Start the CLI.

root# cli root@>

4. Enter configuration mode.

cli> configure [edit] root@#

5. Configure the name of the router. If the name includes spaces, enclose the name

in quotation marks (“ ”).

[edit] root@# set system host-name host-name

6. Configure the router’s domain name.

[edit] root@# set system domain-name domain-name

7. Configure the IP address and prefix length for the router’s Ethernet interface.

[edit] root@# set interfaces fxp0 unit 0 family inet address address/prefix-length

8. Configure the IP address of a backup router, which is used only while the routing

protocol is not running.

[edit] root@# set system backup-router address

9. Configure the IP address of a DNS server.

[edit] root@# set system name-server address

10. Set the root authentication password by entering either a clear-text password,

an encrypted password, or an SSH public key string (DSA or RSA).

[edit] root@# set system root-authentication plain-text-password New password: password Retype new password: password

[edit] root@# set system root-authentication encrypted-password encrypted-password

[edit] root@# set system root-authentication ssh-dsa public-key

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Chapter 10: Configuring JUNOS Software

[edit] root@# set system root-authentication ssh-rsa public-key

11. Optionally, display the configuration to verify that it is correct.

[edit] root@# show system {

host-name host-name; domain-name domain-name; backup-router address; root-authentication {

authentication-method (password | public-key); } name-server {

address; }

} interfaces {

fxp0 {

unit 0 {

family inet {

address address/prefix-length;

}

} }

}

12. Commit the configuration to activate it on the router.

[edit] root@# commit

13. Optionally, configure additional properties by adding the necessary configuration

statements. Then commit the changes to activate them on the router.

[edit] root@host# commit

14. When you have finished configuring the router, exit configuration mode.

[edit] root@host# exit root@host>

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64 ■ Configuring the JUNOS Software

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Part 3

Hardware Maintenance, Troubleshooting, and Replacement Procedures

■ Maintaining Hardware Components on page 67

■ Troubleshooting Hardware Components on page 79

■ Replacing Hardware Components on page 87

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66 ■ Hardware Maintenance, Troubleshooting, and Replacement Procedures

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Chapter 11

Maintaining Hardware Components

This chapter describes how to maintain hardware components installed in the router. Some components, such as the craft interface, require no maintenance.

For information about returning a part to Juniper Networks for repair or replacement, see “Contacting Customer Support and Returning Hardware” on page 197.

■ Tools and Parts Required on page 67

■ Routine Maintenance Procedures on page 67

■ Maintaining Cooling System Components on page 68

■ Maintaining the Host Subsystem on page 70

■ Maintaining Packet Forwarding Engine Components on page 72

■ Maintaining the Power Supplies on page 78

Tools and Parts Required

To maintain hardware components, you need the following tools and parts:

■ ESD grounding wrist strap

■ Flat-blade (–) screwdriver

■ Phillips (+) screwdriver, number 1

■ Phillips (+) screwdriver, number 2

Routine Maintenance Procedures

For optimum router performance, perform the following preventive maintenance procedures regularly:

■ Inspect the installation site for moisture, loose wires or cables, and excessive

dust. Make sure that airflow is unobstructed around the router and into the air intake vents.

■ Check the status-reporting devices on the craft interface—System alarms and

LEDs.

■ Inspect the air filter at the left rear of the router, replacing it every 6 months for

optimum cooling system performance. Do not run the router for more than a

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few minutes without the air filter in place. For maintenance instructions, see “Maintaining the Air Filter” on page 68.

Maintaining Cooling System Components

This section discusses the following topics:

■ Maintaining the Air Filter on page 68

■ Maintaining the Fan Tray on page 68

Maintaining the Air Filter

A dirty air filter restricts airflow in the unit, producing a negative effect on the ventilation of the chassis. The filter degrades over time. Periodically replace the filter in use, as well as spares. We recommend that you replace the filter every 6 months. For procedures to replace the air filter, see “Replacing the Air Filter” on page 94.

CAUTION: Always keep the air filter in place while the router is operating. Because the fans are very powerful, they could pull small bits of wire or other materials into the router through the unfiltered air intake. This could damage the router components.

Use spare filters within one year of manufacture. Check the date of manufacture printed on the filter. Store spare air filters in a dark, cool, and dry place. Storing air filters at higher temperatures, or where they can be exposed to ultraviolet (UV) radiation, hydrocarbon emissions, or vapors from solvents, can significantly reduce their life.

Maintaining the Fan Tray

The fan tray contains multiple fans that work in unison to cool the router components. If one fan fails, the host subsystem adjusts the speed of the remaining fans to maintain proper cooling. A red alarm is triggered when a fan fails, and a yellow alarm and red alarm is triggered when a fan tray is removed.

To display the status of the cooling system, issue the show chassis environment command. The output is similar to the following:

user@host> show chassis environment

Class Item Status Measurement Temp PEM 0 OK 45 degrees C / 113 degrees F PEM 1 OK 45 degrees C / 113 degrees F PEM 2 Absent PEM 3 Absent

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Chapter 11: Maintaining Hardware Components

Routing Engine 0 OK 42 degrees C / 107 degrees F Routing Engine 1 Present CB 0 Intake OK 40 degrees C / 104 degrees F CB 0 Exhaust A OK 37 degrees C / 98 degrees F CB 0 Exhaust B OK 42 degrees C / 107 degrees F CB 0 ACBC OK 41 degrees C / 105 degrees F CB 0 SF A OK 49 degrees C / 120 degrees F CB 0 SF B OK 44 degrees C / 111 degrees F CB 1 Intake OK 39 degrees C / 102 degrees F CB 1 Exhaust A OK 37 degrees C / 98 degrees F CB 1 Exhaust B OK 42 degrees C / 107 degrees F CB 1 ACBC OK 40 degrees C / 104 degrees F CB 1 SF A OK 49 degrees C / 120 degrees F CB 1 SF B OK 43 degrees C / 109 degrees F FPC 1 Intake OK 33 degrees C / 91 degrees F FPC 1 Exhaust A OK 39 degrees C / 102 degrees F FPC 1 Exhaust B OK 52 degrees C / 125 degrees F FPC 1 I3 0 TSensor OK 50 degrees C / 122 degrees F FPC 1 I3 0 Chip OK 54 degrees C / 129 degrees F FPC 1 I3 1 TSensor OK 47 degrees C / 116 degrees F FPC 1 I3 1 Chip OK 50 degrees C / 122 degrees F FPC 1 I3 2 TSensor OK 46 degrees C / 114 degrees F FPC 1 I3 2 Chip OK 49 degrees C / 120 degrees F FPC 1 I3 3 TSensor OK 43 degrees C / 109 degrees F FPC 1 I3 3 Chip OK 48 degrees C / 118 degrees F FPC 1 IA 0 TSensor OK 48 degrees C / 118 degrees F FPC 1 IA 0 Chip OK 49 degrees C / 120 degrees F FPC 1 IA 1 TSensor OK 45 degrees C / 113 degrees F FPC 1 IA 1 Chip OK 50 degrees C / 122 degrees F FPC 2 Intake OK 33 degrees C / 91 degrees F FPC 2 Exhaust A OK 40 degrees C / 104 degrees F FPC 2 Exhaust B OK 54 degrees C / 129 degrees F FPC 2 I3 0 TSensor OK 52 degrees C / 125 degrees F FPC 2 I3 0 Chip OK 54 degrees C / 129 degrees F FPC 2 I3 1 TSensor OK 49 degrees C / 120 degrees F FPC 2 I3 1 Chip OK 50 degrees C / 122 degrees F FPC 2 I3 2 TSensor OK 48 degrees C / 118 degrees F FPC 2 I3 2 Chip OK 51 degrees C / 123 degrees F FPC 2 I3 3 TSensor OK 44 degrees C / 111 degrees F FPC 2 I3 3 Chip OK 46 degrees C / 114 degrees F FPC 2 IA 0 TSensor OK 49 degrees C / 120 degrees F FPC 2 IA 0 Chip OK 50 degrees C / 122 degrees F FPC 2 IA 1 TSensor OK 48 degrees C / 118 degrees F FPC 2 IA 1 Chip OK 52 degrees C / 125 degrees F Fans Front Fan OK Spinning at intermediate-speed Middle Fan OK Spinning at intermediate-speed Rear Fan OK Spinning at intermediate-speed

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Maintaining the Host Subsystem

The host subsystem comprises an SCB and a Routing Engine installed into a slot in the SCB. To maintain the host subsystem components, follow these guidelines:

■ Check the LEDs on the craft interface to view information about the status of

the Routing Engines. For more information about the LEDs, see “Craft Interface” on page 17.

■ Check the LEDs on the SCB faceplate (see Table 9 on page 13).

■ Check the LEDs on the Routing Engine faceplate (see Table 10 on page 16).

■

To check the status of the Routing Engines, issue the show chassis routing-engine command. The output is similar to the following:

user@host> show chassis routing-engine

Routing Engine status: Slot 0: Current state Master Election priority Master (default) Temperature 45 degrees C / 113 degrees F CPU temperature 43 degrees C / 109 degrees F DRAM 2048 MB Memory utilization 15 percent CPU utilization: User 0 percent Background 0 percent Kernel 8 percent Interrupt 0 percent Idle 92 percent Model RE-S-1300 Serial ID 1000694968 Start time 2007-07-10 12:27:39 PDT Uptime 1 hour, 40 minutes, 37 seconds Load averages: 1 minute 5 minute 15 minute

0.11 0.06 0.01 Routing Engine status: Slot 1: Current state Backup Election priority Backup (default) Temperature 46 degrees C / 114 degrees F CPU temperature 42 degrees C / 107 degrees F DRAM 2048 MB Memory utilization 13 percent CPU utilization: User 0 percent Background 0 percent Kernel 0 percent Interrupt 0 percent Idle 100 percent Model RE-S-1300 Serial ID 1000694976 Start time 2007-06-19 14:17:00 PDT Uptime 20 days, 23 hours, 51 minutes, 4 seconds

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Chapter 11: Maintaining Hardware Components

■

To check the status of the SCBs, issue the show chassis environment cb command. The output is similar to the following:

user@host> show chassis environment cb

CB 0 status: State Online Master Temperature 40 degrees C / 104 degrees F Power 1

1.2 V 1208 mV

1.5 V 1521 mV

1.8 V 1807 mV

2.5 V 2507 mV

3.3 V 3319 mV

5.0 V 5033 mV

12.0 V 12142 mV

1.25 V 1243 mV

3.3 V SM3 3312 mV 5 V RE 5059 mV 12 V RE 11968 mV Power 2

11.3 V bias PEM 11253 mV

4.6 V bias MidPlane 4814 mV

11.3 V bias FPD 11234 mV

11.3 V bias POE 0 11176 mV

11.3 V bias POE 1 11292 mV Bus Revision 42 FPGA Revision 1 CB 1 status: State Online Standby Temperature 40 degrees C / 104 degrees F Power 1

1.2 V 1202 mV

1.5 V 1514 mV

1.8 V 1807 mV

2.5 V 2500 mV

3.3 V 3293 mV

5.0 V 5053 mV

12.0 V 12200 mV

1.25 V 1260 mV

3.3 V SM3 3319 mV 5 V RE 5059 mV 12 V RE 12007 mV Power 2

11.3 V bias PEM 11311 mV

4.6 V bias MidPlane 4827 mV

11.3 V bias FPD 11330 mV

11.3 V bias POE 0 11292 mV

11.3 V bias POE 1 11311 mV Bus Revision 42 FPGA Revision 1

To check the status of a specific SCB, issue the show chassis environment cb command and include the slot number of the SCB. The output is similar to the following:

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user@host> show chassis environment cb 0 CB 0 status: State Online Temperature Intake 66 degrees C / 150 degrees F Temperature Exhaust A 67 degrees C / 152 degrees F Temperature Exhaust B 73 degrees C / 163 degrees F Power

1.2 V 1153 mV

1.5 V 1417 mV

1.8 V 1704 mV

2.5 V 2375 mV

3.3 V 3138 mV

5.0 V 4763 mV

1.2 V Rocket IO 1160 mV

1.5 V Rocket IO 1408 mV

1.8 V RLDRAM 1717 mV I2C Slave Revision 15

For more information about using the CLI, see the JUNOS software manuals.

Maintaining Packet Forwarding Engine Components

For instructions on maintaining Packet Forwarding Engine components, see the following sections:

■ Maintaining DPCs on page 72

■ Maintaining DPC Cables on page 74

■ Handling and Storing DPCs on page 74

Maintaining DPCs

The router can have up to three Dense Port Concentrators (DPCs) mounted horizontally in the DPC card cage at the front of the chassis, as shown in Figure 1 on page 6. To maintain DPCs, perform the following procedures regularly:

■ Check the LEDs on the craft interface directly above each DPC slot. The green

LED labeled OK lights steadily when a DPC is functioning normally. For more information, see “DPC LEDs” on page 20.

■

Check the OK/FAIL LED on the DPC. For more information, see Table 7 on page 10 and Table 8 on page 10. If the DPC detects a failure, the DPC sends an alarm message to the Routing Engine.

■

Issue the CLI show chassis fpc command to check the status of installed DPCs. As shown in the sample output, the value Online in the column labeled State indicates that the DPC is functioning normally:

user@host> show chassis fpc

Temp CPU Utilization (%) Memory Utilization (%) Slot State (C) Total Interrupt DRAM (MB) Heap Buffer 0 Online 41 9 0 1024 15 57 1 Online 43 5 0 1024 16 57 2 Online 43 11 0 1024 16 57

72 ■ Maintaining Packet Forwarding Engine Components

Juniper Networks MX240 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

About This Guide

Objectives

Audience

Documentation Conventions

List of Technical Publications

Obtaining Documentation

Documentation Feedback

Requesting Technical Support

MX240 Router Overview

Router Overview

Router Description

Component Redundancy

Hardware Components

Router Chassis

Midplane

Dense Port Concentrators (DPCs)

DPC Components

Host Subsystem

Switch Control Board (SCB)

SCB Slots

SCB Redundancy

SCB Components

SCB LEDs

Routing Engine

Routing Engine Components

Routing Engine Interface Ports

Routing Engine Boot Sequence

Cable Management System

Craft Interface

Alarm LEDs and Alarm Cutoff/Lamp Test Button

Host Subsystem LEDs

Power Supply LEDs

DPC LEDs

SCB LEDs

Fan LEDs

Alarm Relay Contacts

Power Supplies

AC Power Supply

AC Power Supply LEDs

DC Power Supply

DC Power Supply Configurations for the MX240 Router

DC Power Supply LEDs

Cooling System

Setting Up the Router

Preparing the Site for Router Installation

Site Preparation Checklist

Cabinet Requirements

Cabinet Size and Clearance Requirements

Cabinet Airflow Requirements

Rack Requirements

Rack Size and Strength

Spacing of Mounting Bracket Holes

Connection to Building Structure

Clearance Requirements for Airflow and Hardware Maintenance

Installation Overview

Unpacking the Router

Tools and Parts Required

Unpacking the Router

Verifying Parts Received

Installing the Mounting Hardware

Installing the Mounting Hardware for a Rack or Cabinet

Moving the Mounting Brackets for Center-Mounting the Router

Installing the Router

Safety Requirements, Warnings, and Guidelines

Installing the Router Using a Mechanical Lift

Tools Required

Installing the Router Using a Lift

Connecting the Router

Tools and Parts Required

Connecting the Router to Management and Alarm Devices

Connecting to a Network for Out-of-Band Management

Connecting to a Management Console or Auxiliary Device

Connecting to an External Alarm-Reporting Device

Connecting DPC Cables

Grounding and Providing Power to the Router