Juniper Networks MX240 Bedienungsanleitung

MX240™ Ethernet Services RouterHardware GuideJuniper Networks, Inc.1194 North Mathilda AvenueSunnyvale, California 94089USA408-745-2000www.juniper.net

Lightning Activity Warning ...142Operating Temperature Warning ...

user@host> show chassis environment cb 0CB 0 status: State Online Temperature Intake 66 degrees C / 150 degrees F T

3 Empty 4 Empty 5 Online 42 6 0 1024 16 57For more detailed output, add the detail option. The followin

Maintaining DPC CablesTo maintain DPCs and DPC cables, follow these guidelines: Use the cable management system (shown in Figure 11 on page 17) to su

CAUTION: Failure to handle DPCs as specified in this document can cause irreparabledamage.This section discusses how to hold DPCs in both the vertica

NOTE: A DPC weighs 13.1 lb (5.9 kg). Be prepared to accept the full weight of theDPC as you lift it.To hold a DPC vertically:1. Orient the DPC so that

Never carry the DPC by the faceplate with only one hand.Do not rest any edge of a DPC directly against a hard surface (seeFigure 34 on page 77).Do not

If you must insert the DPC into a bag by yourself, first lay the DPC horizontally ona flat, stable surface, sheet metal side down. Orient the DPC with

Chapter 12Troubleshooting Hardware ComponentsThis chapter describes how to troubleshoot problems with hardware componentsinstalled in the router. If y

You enter CLI commands on one or more external management devices connectedto ports on the Routing Engine. For more information about the Routing Engi

Alarm LEDs—One large red circular LED and one large yellow triangular LED,located on the upper right of the craft interface, indicate two levels of

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

RE might still be booting or the SCB is not receiving power. For more information,see “SCB Components” on page 13. RE LEDs—Four LEDs, labeled MASTER,

See “Maintaining Cooling System Components” on page 68.If the fans are not functioning normally, follow these guidelines to troubleshoot thefans: I

Total RLDRAM 256 MB Total DDR DRAM 4096 MB Start time: 2007-12-06 11:33:01 PST U

Temperature OK DC output OKIf a power supply is not functioning normally, perform the following steps to

86 Troubleshooting the Power SystemMX240 Ethernet Services Router Hardware Guide

Chapter 13Replacing Hardware ComponentsThis chapter explains how to replace hardware components on the router. It discussesthe following topics: Fiel

Table 23: Field-Replaceable UnitsHot-Pluggable FRUsHot-Removable and Hot-Insertable FRUsMaster Switch Control Board (SCB) (ifredundant)Master Routing

Table 24: Tools and Parts Required (continued)ComponentsTool or partAir filterRouting EngineCraft interfaceSCBCables and connectorsFan trayPhillips (+

4. Grasp the craft interface faceplate and carefully tilt it toward you until it ishorizontal.5. Disconnect the ribbon cable from the back of the face

Figure 37: Installing a Craft InterfaceReplacing Alarm Relay WiresThe alarm relay wires connect external alarm-reporting devices to the RED andYELLOW

Return Procedure ...203Tools and Parts Required ...

Connecting the Alarm Relay WiresTo connect the alarm relay wires between a router and an alarm-reporting device(see Figure 38 on page 91):1. Prepare t

WARNING: To avoid injury, keep tools and your fingers away from the fans as youslide the fan tray out of the chassis. The fans might still be spinning

Figure 40: Installing the Fan Tray in an MX240 RouterReplacing the Air FilterThe router has one air filter that installs vertically in the rear of the

To remove the air filter (see Figure 41 on page 95):1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist andconnect the strap

Figure 42: Installing the Air Filter in an MX240 RouterReplacing Host Subsystem ComponentsTo replace a host subsystem, use the following procedures:

1. Determine whether the host subsystem is functioning as the master or as thebackup, using one of the two following methods: Check the Routing Engine

“Taking the Host Subsystem Offline” on page 96). To replace an SCB, use the followingprocedures: Operating and Positioning the SCB Ejectors on page 9

Removing an SCBTo remove an SCB (see Figure 43 on page 99):NOTE: You can remove the SCB and Routing Engine as a unit, or remove the RoutingEngine sepa

Installing an SCBTo install an SCB (see Figure 44 on page 102):1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist andconnec

To check the status of the SCB, use the CLI command:user@host> show chassis environment cbCB 0 status: State Online Master T

List of FiguresFigure 1: Front View of a Fully Configured Router Chassis ...6Figure 2: Rear View of a Fully Configured AC-P

Figure 44: Installing an SCBReplacing a Routing EngineThe router can have one or two Routing Engines. They are located in the front of thechassi withi

NOTE: To maintain proper airflow through the chassis, do not leave an SCB installedin the chassis without a Routing Engine for extended periods of tim

user@host> show chassis routing-engineRouting Engine status: Slot 0: Current state Master...For more information about using

Replacing the Management Ethernet CableTo connect the Routing Engine to a network for out-of-band management, connectan Ethernet cable with RJ-45 conn

Connecting the Cable to a Management Console or Auxiliary DeviceTo connect a serial cable to a management console or auxiliary device:1.Plug the RJ-45

user@host>request chassis fpc slot slot-number offlineFor more information about the command, see the JUNOS System Basics andServices Command Refer

CAUTION: After removing a DPC from the chassis, wait at least 30 seconds beforereinserting it, removing a DPC from a different slot, or inserting a DP

10. Insert the appropriate cables into the cable connector ports on each DPC (seeFigure 51 on page 110). Secure the cables so that they are not suppor

Figure 50: Installing a DPCFigure 51: Attaching a Cable to a DPCRemoving an SFP or XFP TransceiverSmall form-factor pluggable (SFPs) and XFPs are opti

WARNING: Do not look directly into a fiber-optic transceiver or into the end of afiber-optic cable. Fiber-optic transceivers contain laser light sourc

Figure 40: Installing the Fan Tray in an MX240 Router ...94Figure 41: Removing the Air Filter from an MX240 Router ...

Installing an SFP or XFP TransceiverTo install an SFP or XFP:1. Attach an ESD wrist strap to your bare wrist and connect the wrist strap to oneof the

Replacing an AC Power Cord on page 118 Replacing a DC Power Supply Cable on page 119Removing an AC Power SupplyThe power supplies are located at th

Installing an AC Power SupplyTo install an AC power supply (see Figure 54 on page 114):1. Attach an electrostatic discharge (ESD) grounding strap to y

The power supplies are located at the rear of the chassis. Each DC power supplyweighs approximately 3.8 lb (1.7 kg).CAUTION: Do not leave a power supp

Figure 55: Removing a DC Power Supply from an MX240 RouterInstalling a DC Power SupplyWARNING: Before performing the following procedure, ensure that

CAUTION: You must ensure that power connections maintain the proper polarity.The power source cables might be labeled (+) and (–) to indicate their po

Figure 56: Installing a DC Power Supply in an MX240 RouterFigure 57: Connecting DC Power to the RouterReplacing an AC Power CordTo replace an AC power

Disconnecting an AC Power CordWARNING: Before working on the router or near power supplies, unplug the powercord from an AC router.To disconnect the A

Disconnecting a DC Power Supply CableTo disconnect a power cable for a DC power supply:1. Switch the dedicated facility circuit breaker to the off pos

Figure 58: Connecting Power Cables to the DC Power Supply4. Replace the clear plastic cover over the terminal studs on the faceplate.5. Verify that th

List of TablesTable 1: Notice Icons ...xviiiTable 2: Text and Syntax Co

2. Loosen the captive screws on either side of the chassis.3. Remove the cable manager.Figure 59: Removing or Installing the Cable Management SystemIn

Part 4Appendixes Safety and Regulatory Compliance Information on page 125 Physical Specifications on page 161 Router Environmental Specifications o

124 AppendixesMX240 Ethernet Services Router Hardware Guide

Appendix ASafety and Regulatory ComplianceInformationTo install and use the router safely, follow proper safety procedures. This appendixdiscusses the

Attention Ce symbole d'avertissement indique un danger. Vous vous trouvez dansune situation pouvant causer des blessures ou des dommages corporel

General Safety Guidelines and WarningsThe following guidelines help ensure your safety and protect the router from damage.The list of guidelines might

Waarschuwing Installatie en reparaties mogen uitsluitend door getraind en bevoegdpersoneel uitgevoerd worden.Varoitus Ainoastaan koulutettu ja pätevä

sécurité. L'accès aux zones de sécurité est sous le contrôle de l'autorité responsablede l'emplacement.Warnung Diese Einheit ist zur In

Preventing Electrostatic Discharge DamageMany router hardware components are sensitive to damage from static electricity.Some components can be impair

In addition, establish procedures to protect your equipment in the event of a fireemergency. Juniper Networks products should be installed in an envir

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

Chassis-Lifting GuidelinesThe weight of a fully configured chassis is about 128 lb (58.1 kg). Observe thefollowing guidelines for lifting and moving t

Rack-Mounting Requirements and WarningsEnsure that the equipment rack into which the router is installed is evenly and securelysupported, to avoid the

Attention Pour éviter toute blessure corporelle pendant les opérations de montageou de réparation de cette unité en casier, il convient de prendre des

Juniper Networks router må installeres i et stativ som er forankret tilbygningsstrukturen. Denne enheten bør monteres nederst i kabinettet hvis det

Juniper Networks router måste installeras i en ställning som är förankrad ibyggnadens struktur. Om denna enhet är den enda enheten på ställningen s

Laser Beam Warning on page 138 Radiation from Open Port Apertures Warning on page 139General Laser Safety GuidelinesWhen working around PICs, obser

Varoitus Luokan 1 valodiodituote.Attention Alarme de produit LED Class I.Warnung Class 1 LED-Produktwarnung.Avvertenza Avvertenza prodotto LED di Clas

Radiation from Open Port Apertures WarningWARNING: Because invisible radiation might be emitted from the aperture of theport when no fiber cable is co

Operating Temperature Warning on page 142 Product Disposal Warning on page 143Battery Handling WarningWARNING: Replacing the battery incorrectly mi

Jewelry Removal WarningWARNING: Before working on equipment that is connected to power lines, removejewelry, including rings, necklaces, and watches.

About This GuideThis preface provides the following guidelines for using the MX240 Ethernet ServicesRouter Hardware Guide: Objectives on page xvii A

de kopplas ihop med ström och jord och kan förorsaka allvarliga brännskador;metallobjekt kan också sammansvetsas med kontakterna.Lightning Activity Wa

te voorkomen dat de luchtstroom wordt beperkt, dient er minstens 15,2 cm spelingrond de ventilatie-openingen te zijn.Varoitus Ettei Juniper Networks r

Waarschuwing Dit produkt dient volgens alle landelijke wetten en voorschriften teworden afgedankt.Varoitus Tämän tuotteen lopullisesta hävittämisestä

General Electrical Safety Guidelines and Warnings Install the router in compliance with the following local, national, or internationalelectrical cod

Avvertenza Questa apparecchiatura deve essere collegata a massa. Accertarsi che ildispositivo host sia collegato alla massa di terra durante il normal

Aviso Este dispositivo possui mais do que uma conexão de fonte de alimentação deenergia; para poder remover a fonte de alimentação de energia, deverão

Varning! Innan du arbetar med ett chassi eller nära strömförsörjningsenheter skalldu för växelströmsenheter dra ur nätsladden och för likströmsenhete

WARNING: The router is pluggable type A equipment installed in a restricted-accesslocation. It has a separate protective earthing terminal (sized for

accordance with the National Electrical Code in the US and the Canadian ElectricalCode in Canada. Run two wires from the circuit breaker box to a sou

¡Atención! Emplee sólo conductores de cobre.Varning! Använd endast ledare av koppar.DC Power Disconnection WarningWARNING: Before performing any of th

Documentation ConventionsTable 1 on page xviii defines the notice icons used in this guide.Table 1: Notice IconsDescriptionMeaningIconIndicates import

que toda a corrente foi DESLIGADA, localize o disjuntor no painel que serve o circuitode corrente contínua e coloque-o na posição OFF (Desligado), seg

Aviso Ao instalar a unidade, a ligação à terra deverá ser sempre a primeira a serligada, e a última a ser desligada.¡Atención! Al instalar el equipo,

Aviso Ate con alambre la fuente de potencia cc Usando los terminales apropiadosen el extremo del cableado. Al conectar potencia, la secuencia apropiad

Avvertenza Quando occorre usare trecce, usare connettori omologati, come quellia occhiello o a forcella con linguette rivolte verso l'alto. I con

EN 60950-1 Safety of Information Technology Equipment EMC AS/NZS 3548 Class A (Australia/New Zealand) EN55022 Class A (Europe) FCC Part 15 Class

Compliance Statements for EMC RequirementsCanadaThis Class A digital apparatus complies with Canadian ICES-003.Cet appareil numérique de la classe A e

Declaration of ConformityJapan158 Agency Approvals and ComplianceMX240 Ethernet Services Router Hardware Guide

Translation:This is a Class A product. In a domestic environment this product might cause radiointerference in which case the user might be required t

160 Agency Approvals and ComplianceMX240 Ethernet Services Router Hardware Guide

Appendix BPhysical Specifications Physical Specifications on page 161Physical SpecificationsTable 25 on page 161 summarizes the physical specificatio

Table 2: Text and Syntax Conventions (continued)ExamplesDescriptionConvention To configure a stub area, includethe stub statement at the [editprotocol

162 Physical SpecificationsMX240 Ethernet Services Router Hardware Guide

Appendix CRouter Environmental Specifications Router Environmental Specifications on page 163Router Environmental SpecificationsTable 26 on page 163

164 Router Environmental SpecificationsMX240 Ethernet Services Router Hardware Guide

Appendix DPower Guidelines, Requirements, andSpecifications Chassis Grounding Specifications on page 165 DC Power Specifications and Requirements on

Figure 61: Grounding Cable LugCAUTION: Before router installation begins, a licensed electrician must attach a cablelug to the grounding and power cab

DC Power System Electrical SpecificationsTable 28 on page 167 lists the DC power system electrical specifications.Table 28: DC Power System Electrical

power supply configurations. The base DC-powered router includes the midplane,craft interface, and fan tray running at normal speed.Table 30: DC-Power

1.38 A + 0.4 A + 3.1 A + 1.9 A + 3(7.6 A) =1.38 A + 0.4 A + 3.1 A + 1.9 A + 22.8 A =29.58 A @ –48 VDC = 1,420 W DC Input current from a DC source oth

DC Power Cable SpecificationsFigure 62 on page 170 shows a typical DC source cabling arrangement.Figure 62: Typical DC Source Cabling to the RouterThe

DC Power Cable Lug SpecificationsThe accessory box shipped with the router includes the cable lugs that attach to theterminal studs of each power supp

This product includes the Envoy SNMP Engine, developed by Epilogue Technology, an Integrated Systems Company. Copyright © 1986-1997, EpilogueTechnolog

Table 6 on page xxv lists additional books on Juniper Networks solutions that you canorder through your bookstore. A complete list of such books is av

AC Power Specifications AC Power System Electrical Specifications on page 172 AC Power Supply Electrical Specifications on page 172AC Power System E

For AC-powered routers, you can use the information in Table 35 on page 173 andTable 36 on page 173 to calculate the power consumption and thermal out

Base router (with fan tray at normal speed and two power supplies) + 1 SCB +1 Routing Engine + 1 DPC =270 W + 176 W + 106 W + 367 W = 919 W Maximum A

Table 37 on page 175 provides specifications and Figure 64 on page 175 depicts theplug on the AC power cord provided for each country or region.Table

NOTE: In North America, AC power cords must not exceed 4.5 m (approximately14.75 ft) in length, to comply with National Electrical Code (NEC) Sections

advice. Strong sources of electromagnetic interference (EMI) can destroy the signaldrivers and receivers in the router and conduct power surges over t

178 Site Electrical Wiring GuidelinesMX240 Ethernet Services Router Hardware Guide

Appendix ECable and Wire Guidelines andSpecificationsTo prepare for router or component installation, ensure that you have all requiredcables and wire

Single-mode fiber is so small in diameter that rays of light can reflect internallythrough one layer only. Interfaces with single-mode optics use lase

Calculating Power Budget for Fiber-Optic CableTo ensure that fiber-optic connections have sufficient power for correct operation,calculate the link&ap

Table 3: Technical Documentation for Supported Routing Platforms (continued)DescriptionBookProvides an overview of policy concepts and describes how

Table 38: Estimated Values for Factors Causing Link Loss (continued)Estimated Link-Loss ValueLink-Loss Factor0.5 dBSpliceSingle-mode—0.5 dB/kmMultim

Routing Engine Interface Cable and Wire SpecificationsTable 39 on page 183 lists the specifications for the cables that connect to managementports and

184 Routing Engine Interface Cable and Wire SpecificationsMX240 Ethernet Services Router Hardware Guide

Appendix FCable Connector PinoutsThis appendix describes the pinouts for the following cable connectors: RJ-45 Connector Pinouts for the Routing Engi

an auxiliary or console management device. For more information, see “RoutingEngine Interface Ports” on page 16. Table 41 on page 186 describes the RJ

Appendix GInstalling the Router Without aMechanical LiftIf you cannot use a mechanical lift to install the router (the preferred method), youcan insta

how to remove components from the chassis, first from the rear and then from thefront: Removing the Power Supplies on page 188 Removing the Fan Tray

Removing the Fan TrayIn the rear of the chassis, the fan tray is located on the right of the chassis. The fantray weighs about 4.2 lb (1.9 kg).To remo

4. Simultaneously rotate the ejector handles counterclockwise to unseat the SCB.5. Grasp the ejector handles and slide the SCB about halfway out of th

CAUTION: The weight of the DPC is concentrated in the back end. Be prepared toaccept the full weight—up to 13.1 lb (5.9 kg)—as you slide the DPC out o

Table 3: Technical Documentation for Supported Routing Platforms (continued)DescriptionBookJ-Web User GuideDescribes how to use the J-Web graphical u

Installing the Chassis in the Rack ManuallyTo install the router in the rack (see Figure 69 on page 193):CAUTION: If you are installing more than one

Figure 69: Installing the Router in the RackNOTE: This illustration depicts the router being installed in an open-frame rack. Foran illustration of th

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist andconnect the strap to one of the ESD points on the chassis. For more i

Figure 71: Installing a Fan TrayReinstalling SCBsTo reinstall an SCB (see Figure 72 on page 196):CAUTION: Before removing or replacing an SCB, ensure

Figure 72: Installing an SCBReinstalling DPCsTo reinstall a DPC (see Figure 73 on page 196):1. Attach an electrostatic discharge (ESD) grounding strap

Appendix HContacting Customer Support andReturning HardwareThis appendix describes how to return the router or individual components to JuniperNetwork

PIC 2 BUILTIN BUILTIN 1x 10GE(LAN/WAN) Xcvr 0 REV 01 740-014279 KB602C3 XFP-10G-LR PIC 3

Figure 75: MX240 Chassis Serial Number LabelSCB Serial Number LabelThe serial number is located on the right side of the top of the SCB (seeFigure 76

DPC Serial Number LabelThe serial number label is located on the center of the right side of the DPC (seeFigure 77 on page 200).Figure 77: DPC Serial

Figure 78: AC Power Supply Serial Number LabelFigure 79: DC Power Supply Serial Number LabelRouting Engine Serial Number LabelThe serial number label

Table 3: Technical Documentation for Supported Routing Platforms (continued)DescriptionBookProvides an overview, basic instructions, and specificatio

Figure 80: Routing Engine Serial Number LabelContacting Customer SupportAfter you have located the serial numbers of the components you need to return

Return ProcedureIf the problem cannot be resolved by the JTAC technician, a Return MaterialsAuthorization (RMA) is issued. This number is used to trac

Tools and Parts RequiredTo remove components from the router or the router from a rack, you need thefollowing tools and parts: 2.5 mm flat-blade (–)

6. Remove the cables that connect to all external devices. For instructions, see“Replacing Connections to Routing Engine Interface Ports” on page 104.

206 Packing Components for ShipmentMX240 Ethernet Services Router Hardware Guide

Part 5Index Index on page 209Index 207

208 IndexMX240 Ethernet Services Router Hardware Guide

IndexSymbols#, comments in configuration statements...xix( ), in syntax descriptions...xix<

grounding See DC power and grounding cablespower See AC power cordcable management systemdescription...

replacing...106status, checking...72, 74, 83DPCscompone

Table 4: JUNOS Software Network Operations GuidesDescriptionBookDescribes the most basic tasks for running a network using JuniperNetworks products. T

maintenance See maintenance guidelinesDPC...74packingrouter for shipment...

powering on the router...55, 58Rrackclearance around, required...32mounting bra

specificationsAC power cord...174cable...

Table 5: JUNOS Software with Enhanced Services Documentation (continued)DescriptionBookProvides instructions for migrating an SSG device runningScreen

Table 6: Additional Books Available Through http://www.juniper.net/books (continued)DescriptionBookProvides an overview of Multiprotocol Label Switchi

Requesting Technical SupportTechnical product support is available through the Juniper Networks TechnicalAssistance Center (JTAC). If you are a custom

xxviii Requesting Technical SupportMX240 Ethernet Services Router Hardware Guide

Part 1MX240 Router Overview Router Overview on page 3 Hardware Components on page 5MX240 Router Overview 1

End User License AgreementREAD THIS END USER LICENSE AGREEMENT (“AGREEMENT”) BEFORE DOWNLOADING, INSTALLING, OR USING THE SOFTWARE. BY DOWNLOADING,INS

2 MX240 Router OverviewMX240 Ethernet Services Router Hardware Guide

Chapter 1Router OverviewThis chapter provides an overview of the MX240 Ethernet Services Router, discussingthe following topics: Router Description o

Component RedundancyThe MX240 chassis provides redundancy and resiliency. The hardware system isfully redundant, including power supplies, Routing Eng

Chapter 2Hardware ComponentsThis chapter provides an overview of the router's hardware components: Router Chassis on page 5 Midplane on page 8

Figure 1: Front View of a Fully Configured Router ChassisFigure 2: Rear View of a Fully Configured AC-Powered Router Chassis (110 V)6 Router Chassis

Figure 3: Rear View of a Fully Configured AC-Powered Router Chassis (220V)Figure 4: Rear View of a Fully Configured DC-Powered Router ChassisRouter Ch

MidplaneThe midplane is located toward the rear of the chassis and forms the rear of the DPCcard cage (see Figure 5 on page 8). The DPCs and SCBs inst

Engine downloads the DPC software, the DPC runs its diagnostics, and the PacketForwarding Engines housed on the DPC are enabled. Forwarding on other D

DPC ComponentsEach DPC consists of the following components: DPC cover, which functions as a ground plane and a stiffener. Fabric interfaces. Two G

Table 8: 40-Port Gigabit Ethernet DPC LEDs (continued)DescriptionStateColorLabelLink is active.No link.On steadilyGreenOffLINKTwo LEDs, located on the

7. Ownership. Juniper and Juniper's licensors, respectively, retain ownership of all right, title, and interest (including copyright) in and to t

Figure 8: SCBSCB SlotsYou can install one or two SCBs. The SCBs install horizontally into the front of thechassis in the slots labeled 0 and 1/0 (the

SCB ComponentsEach SCB consists of the following components: Chassis management Ethernet switch. I2C bus logic, used for low-level communication wit

Routing EngineThe Routing Engine is an Intel-based PC platform that runs JUNOS software. Softwareprocesses that run on the Routing Engine maintain the

CPU—Runs JUNOS software to maintain the router's routing tables and routingprotocols. It has a Pentium-class processor. DRAM—Provides storage

Table 10: Routing Engine LEDsDescriptionStateColorLabelRouting Engine is the Master.On steadilyBlueMASTERHard disk is functioning normally.Greenblinki

Cable Management SystemThe cable management system (see Figure 11 on page 17 and Figure 12 on page 17)consists of plastic dividers located on the left

SCB LEDs on page 20 Fan LEDs on page 20 Alarm Relay Contacts on page 21Figure 13: Front Panel of the Craft InterfaceNOTE: At least one SCB must be

Table 11: Alarm LEDs and Alarm Cutoff/Lamp Test ButtonDescriptionStateColorShapeCritical alarm LED—Indicates a critical conditionthat can cause the ro

DPC LEDsEach 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

Alarm Relay ContactsThe craft interface has two alarm relay contacts for connecting the router to externalalarm devices (see Figure 14 on page 21). Wh

Table of ContentsAbout This Guide xviiObjectives ...x

Figure 15: AC Power SupplyWARNING: The router is pluggable type A equipment installed in a restricted-accesslocation. It has a separate protective ear

Table 17: AC Power Supply LEDsDescriptionStateColorLabelAC power input voltage is below 78 VAC.OffAmberAC OKAC power input voltage is within 78–264 VA

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

The air intake to cool the chassis is located on the side of the chassis next to the airfilter. Air is pulled through the chassis toward the fan tray,

Figure 19: Air Filter26 Cooling SystemMX240 Ethernet Services Router Hardware Guide

Part 2Setting Up the Router Preparing the Site for Router Installation on page 29 Installation Overview on page 35 Unpacking the Router on page 37

28 Setting Up the RouterMX240 Ethernet Services Router Hardware Guide

Chapter 3Preparing the Site for Router InstallationThis chapter describes how to prepare your site for installation of the MX240 router.It discusses t

Table 19: Site Preparation Checklist (continued)DatePerformed ByFor More InformationItem or Task“Calculating Power Budget forFiber-Optic Cable” on pag

Rack RequirementsThe router can be installed in a rack. Many types of racks are acceptable, includingfour-post (telco) racks and open-frame racks. An

SCB LEDs ...20Fan LEDs ...

Figure 20: Typical Open-Frame RackSpacing of Mounting Bracket HolesThe router can be mounted in any rack that provides holes or hole patterns spacedat

routers. Allow 2.8 in. (7 cm) between the side of the chassis and anynon-heat-producing surface such as a wall. For service personnel to remove and i

34 Clearance Requirements for Airflow and Hardware MaintenanceMX240 Ethernet Services Router Hardware Guide

Chapter 4Installation OverviewAfter you have prepared your installation site as described in “Preparing the Site forRouter Installation” on page 29, y

36 MX240 Ethernet Services Router Hardware Guide

Chapter 5Unpacking the RouterThis chapter describes how to prepare to install the router. It discusses the followingtopics: Tools and Parts Required

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 aspossible, where you h

If any part is missing, contact a customer service representative.A fully configured router contains the router chassis with installed components, lis

Table 21: Accessory Box Parts List (continued)QuantityPart1Label, accessories contents, MX2401USB flash drive with JUNOS software1Read me first docume

Chapter 6Installing the Mounting HardwareThe router can be installed in a four-post rack or cabinet or an open-frame rack.Install the mounting hardwar

Chapter 8 Connecting the Router 49Tools and Parts Required ...49Connecting

To install the mounting shelf on the front rails of a four-post rack or cabinet, or therails of an open-frame rack:1. If needed, install cage nuts in

Figure 24: Installing the Mounting Hardware for an Open-Frame RackMoving the Mounting Brackets for Center-Mounting the RouterTwo removable mounting br

7. Tighten the two screws completely.8. Repeat the procedure for the other bracket.44 Moving the Mounting Brackets for Center-Mounting the RouterMX2

Chapter 7Installing the RouterThis chapter discusses the following router installation topics: Safety Requirements, Warnings, and Guidelines on page

Tools RequiredTo install the router, you need the following tools: Mechanical lift Phillips (+) screwdriver, number 2Installing the Router Using a L

Figure 25: Installing the Router in the RackNOTE: This illustration depicts the router being installed in an open-frame rack. Foran illustration of th

48 Installing the Router Using a Mechanical LiftMX240 Ethernet Services Router Hardware Guide

Chapter 8Connecting the Router Tools and Parts Required on page 49 Connecting the Router to Management and Alarm Devices on page 49 Connecting DPC

Figure 27: RJ-45 Cable ConnectorTo connect external devices to the Routing Engine management ports, perform theprocedures described in the following s

system condition that triggers the red or yellow alarm LED on the craft interface alsoactivates the corresponding alarm relay contact.The terminal blo

Chapter 12 Troubleshooting Hardware Components 79Overview of Troubleshooting Resources ...79Junip

CAUTION: Do not leave a fiber-optic transceiver uncovered except when insertingor removing cable. The safety cap keeps the port clean and prevents acc

Chapter 9Grounding and Providing Power to theRouter Tools and Parts Required on page 53 Grounding the Router on page 54 Connecting Power to an AC-P

Grounding the RouterYou ground the router by connecting a grounding cable to earth ground and thenattaching it to the chassis grounding points using U

NOTE: Each power supply must be connected to a dedicated AC power feed and adedicated external circuit breaker. We recommend that you use a 15 A (250

If any of the status LEDs indicates that the power supply is not functioningnormally, repeat the installation and cabling procedures described in “Rep

connected to chassis ground at the battery plant, you can use a multimeter toverify that the ohm output of the –48V and RTN DC cables to chassis groun

Figure 31: Connecting DC Power to the RouterPowering On a DC-Powered RouterWARNING: Before performing the following procedure, ensure that power is re

6. Switch on the dedicated facility circuit breakers to provide power to the DCpower cables.7.Check the INPUT OK LED is lit steadily green to verify t

Wait until a message appears on the console confirming that the operating systemhas halted. For more information about the command, see the JUNOS Syst

Chapter 10Configuring JUNOS Software Configuring the JUNOS Software on page 61Configuring the JUNOS SoftwareThe router is shipped with the JUNOS soft

Replacing DPCs and Transceivers ...106Replacing a DPC ...

3. Start the CLI.root# cliroot@>4. Enter configuration mode.cli> configure[edit]root@#5. Configure the name of the router. If the name includes

[edit]root@# set system root-authentication ssh-rsa public-key11. Optionally, display the configuration to verify that it is correct.[edit]root@# show

64 Configuring the JUNOS SoftwareMX240 Ethernet Services Router Hardware Guide

Part 3Hardware Maintenance, Troubleshooting,and Replacement Procedures Maintaining Hardware Components on page 67 Troubleshooting Hardware Component

66 Hardware Maintenance, Troubleshooting, and Replacement ProceduresMX240 Ethernet Services Router Hardware Guide

Chapter 11Maintaining Hardware ComponentsThis chapter describes how to maintain hardware components installed in the router.Some components, such as t

few minutes without the air filter in place. For maintenance instructions, see“Maintaining the Air Filter” on page 68.Maintaining Cooling System Compo

Routing Engine 0 OK 42 degrees C / 107 degrees F Routing Engine 1 Present CB 0 Intake

Maintaining the Host SubsystemThe host subsystem comprises an SCB and a Routing Engine installed into a slot inthe SCB. To maintain the host subsystem

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 envi