MX240™ Ethernet Services Router Hardware Guide Juniper Networks, Inc. 1194 North Mathilda Avenue Sunnyvale, California 94089 USA 408-745-2000 www.juniper.
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Table of Contents About This Guide xvii Objectives ....................................................................................................xvii Audience .....................................................................................................xvii Documentation Conventions ......................................................................xviii List of Technical Publications ........................................................................xix Obtaining Documentation ......
MX240 Ethernet Services Router Hardware Guide SCB LEDs ................................................................................................20 Fan LEDs ................................................................................................20 Alarm Relay Contacts ..............................................................................21 Power Supplies ..............................................................................................21 AC Power Supply ...................
Table of Contents 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 ................................
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 ................
Table of Contents Replacing DPCs and Transceivers ................................................................106 Replacing a DPC ...................................................................................106 Removing a DPC ............................................................................106 Installing a DPC ..............................................................................108 Removing an SFP or XFP Transceiver ...................................................
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 .........................................................
Table of Contents AC Power Circuit Breaker Specifications ...............................................174 AC Power Cord Specifications ...............................................................174 Site Electrical Wiring Guidelines ..................................................................176 Distance Limitations for Signaling .........................................................176 Radio Frequency Interference ...............................................................
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 ................................
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) .......................................................................................................
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 ................................................................
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 .............
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 ............
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
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 Icon Meaning Description Informational note Indicates important features or instructions. Caution Indicates a situation that might result in loss of data or hardware damage. Warning Alerts you to the risk of personal injury or death. Laser warning Alerts you to the risk of personal injury from a laser.
About This Guide Table 2: Text and Syntax Conventions (continued) Convention Description Examples Plain text like this Represents names of configuration statements, commands, files, and directories; IP addresses; configuration hierarchy levels; or labels on routing platform components. ■ < > (angle brackets) Enclose optional keywords or variables. stub ; | (pipe symbol) Indicates a choice between the mutually exclusive keywords or variables on either side of the symbol.
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 Book Description JUNOS Software for Supported Routing Platforms xx Access Privilege Explains how to configure access privileges in user classes by using permission flags and regular expressions.
About This Guide Table 3: Technical Documentation for Supported Routing Platforms (continued) Book Description Policy Framework Provides an overview of policy concepts and describes how to configure routing policy, firewall filters, and forwarding options. Routing Protocols Provides an overview of routing concepts and describes how to configure routing, routing instances, and unicast routing protocols.
MX240 Ethernet Services Router Hardware Guide Table 3: Technical Documentation for Supported Routing Platforms (continued) Book Description 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.
About This Guide Table 3: Technical Documentation for Supported Routing Platforms (continued) Book Description Getting Started Guide 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.
MX240 Ethernet Services Router Hardware Guide Table 4: JUNOS Software Network Operations Guides Book Description Baseline 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. Interfaces Describes tasks for monitoring interfaces. Tasks include using loopback testing and locating alarms.
About This Guide Table 5: JUNOS Software with Enhanced Services Documentation (continued) Book Description JUNOS Software with Enhanced Services Migration 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.
MX240 Ethernet Services Router Hardware Guide Table 6: Additional Books Available Through http://www.juniper.
About This Guide 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.
MX240 Ethernet Services Router Hardware Guide xxviii ■ Requesting Technical Support
Part 1 MX240 Router Overview ■ Router Overview on page 3 ■ Hardware Components on page 5 MX240 Router Overview ■ 1
MX240 Ethernet Services Router Hardware Guide 2 ■ MX240 Router Overview
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.
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.
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
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
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
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.
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.
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.
Chapter 2: Hardware Components Table 8: 40-Port Gigabit Ethernet DPC LEDs (continued) Label Color State Description LINK Green On steadily Link is active. Off 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. Host Subsystem The host subsystem provides the routing and system management functions of the router.
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.
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.
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.
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.
MX240 Ethernet Services Router Hardware Guide Table 10: Routing Engine LEDs Label Color State Description MASTER Blue On steadily Routing Engine is the Master. HDD Green Green blinking Hard disk is functioning normally. ONLINE Green Blinking Routing Engine is transitioning online. On steadily Routing Engine is functioning normally. On steadily Routing Engine has failed.
Chapter 2: Hardware Components 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.
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).
Chapter 2: Hardware Components Table 11: Alarm LEDs and Alarm Cutoff/Lamp Test Button Shape Color State Description Red On steadily Critical alarm LED—Indicates a critical condition that can cause the router to stop functioning. Possible causes include component removal, failure, or overheating. Yellow On steadily Warning alarm LED—Indicates a serious but nonfatal error condition, such as a maintenance alert or a significant increase in component temperature.
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 Label Color State Description OK Green On steadily DPC is functioning normally. Blinking DPC is transitioning online or offline. Off The slot is not online.
Chapter 2: Hardware Components Alarm Relay Contacts 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 The MX240 router uses either AC or DC power supplies.
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.
Chapter 2: Hardware Components Table 17: AC Power Supply LEDs Label Color State Description AC OK Amber Off AC power input voltage is below 78 VAC. Green On AC power input voltage is within 78–264 VAC. Green Off DC power outputs generated by the power supply are not within the normal operating ranges. On DC power outputs generated by the power supply are within the normal operating ranges. Off Power supply is functioning normally.
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.
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.
MX240 Ethernet Services Router Hardware Guide Figure 19: Air Filter 26 ■ Cooling System
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 Setting Up the Router ■ 27
MX240 Ethernet Services Router Hardware Guide 28 ■ Setting Up the Router
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.
MX240 Ethernet Services Router Hardware Guide Table 19: Site Preparation Checklist (continued) Item or Task For More Information Calculate the optical power budget and optical power margin. “Calculating Power Budget for Fiber-Optic Cable” on page 181 Performed By Date Cabinet Requirements The router can be installed in a standard 482-mm wide (or larger) enclosed cabinet.
Chapter 3: Preparing the Site for Router Installation 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.
MX240 Ethernet Services Router Hardware Guide 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.
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.
MX240 Ethernet Services Router Hardware Guide 34 ■ Clearance Requirements for Airflow and Hardware Maintenance
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.
MX240 Ethernet Services Router Hardware Guide 36 ■
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.
MX240 Ethernet Services Router Hardware Guide 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.
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.
MX240 Ethernet Services Router Hardware Guide Table 21: Accessory Box Parts List (continued) 40 ■ Part Quantity Label, accessories contents, MX240 1 USB flash drive with JUNOS software 1 Read me first document 1 Affidavit for T1 connection 1 Juniper Networks Product Warranty 1 End User License Agreement 1 Document sleeve 1 3 in. x 5 in. pink bag 2 9 in. x 12 in. pink bag, ESD 2 Accessory box, 19 in. x 12 in. x 3 in.
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.
MX240 Ethernet Services Router Hardware Guide 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.
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.
MX240 Ethernet Services Router Hardware Guide 44 ■ 7. Tighten the two screws completely. 8. Repeat the procedure for the other bracket.
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.
MX240 Ethernet Services Router Hardware Guide 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.
Chapter 7: Installing the Router Figure 25: Installing the Router in the Rack 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.
MX240 Ethernet Services Router Hardware Guide 48 ■ Installing the Router Using a Mechanical Lift
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.
MX240 Ethernet Services Router Hardware Guide 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-o
Chapter 8: Connecting the Router 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.
MX240 Ethernet Services Router Hardware Guide 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.
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
MX240 Ethernet Services Router Hardware Guide 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.
Chapter 9: Grounding and Providing Power to the Router 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.
MX240 Ethernet Services Router Hardware Guide 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.
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.
MX240 Ethernet Services Router Hardware Guide Figure 31: Connecting DC Power to the Router Powering On a DC-Powered Router 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.
Chapter 9: Grounding and Providing Power to the Router 6. Switch on the dedicated facility circuit breakers to provide power to the DC power cables. 7. Check the INPUT OK LED is lit steadily green to verify that power is present. 8. If power is not present: 9. ■ 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.
MX240 Ethernet Services Router Hardware Guide 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. 60 ■ 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.
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.
MX240 Ethernet Services Router Hardware Guide 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.
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.
MX240 Ethernet Services Router Hardware Guide 64 ■ Configuring the JUNOS Software
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 Hardware Maintenance, Troubleshooting, and Replacement Procedures ■ 65
MX240 Ethernet Services Router Hardware Guide 66 ■ Hardware Maintenance, Troubleshooting, and Replacement Procedures
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.
MX240 Ethernet Services Router Hardware Guide 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.
Chapter 11: Maintaining Hardware Components Fans Routing Engine 0 Routing Engine 1 CB 0 Intake CB 0 Exhaust A CB 0 Exhaust B CB 0 ACBC CB 0 SF A CB 0 SF B CB 1 Intake CB 1 Exhaust A CB 1 Exhaust B CB 1 ACBC CB 1 SF A CB 1 SF B FPC 1 Intake FPC 1 Exhaust A FPC 1 Exhaust B FPC 1 I3 0 TSensor FPC 1 I3 0 Chip FPC 1 I3 1 TSensor FPC 1 I3 1 Chip FPC 1 I3 2 TSensor FPC 1 I3 2 Chip FPC 1 I3 3 TSensor FPC 1 I3 3 Chip FPC 1 IA 0 TSensor FPC 1 IA 0 Chip FPC 1 IA 1 TSensor FPC 1 IA 1 Chip FPC 2 Intake FPC 2 Exhaust A
MX240 Ethernet Services Router Hardware Guide 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).
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 Temperature Power 1 1.2 V 1.5 V 1.8 V 2.5 V 3.3 V 5.0 V 12.0 V 1.25 V 3.3 V SM3 5 V RE 12 V RE Power 2 11.3 V bias PEM 4.6 V bias MidPlane 11.3 V bias FPD 11.3 V bias POE 0 11.3 V bias POE 1 Bus Revision FPGA Revision CB 1 status: State Temperature Power 1 1.2 V 1.5 V 1.8 V 2.5 V 3.
MX240 Ethernet Services Router Hardware Guide 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.
Chapter 11: Maintaining Hardware Components 3 4 5 Empty Empty Online 42 6 0 1024 16 57 For more detailed output, add the detail option.
MX240 Ethernet Services Router Hardware Guide Maintaining DPC Cables To maintain DPCs and DPC cables, follow these guidelines: ■ Use the cable management system (shown in Figure 11 on page 17) to support cables and prevent cables from dislodging or developing stress points. ■ Place excess cable out of the way in the cable management system. Do not allow fastened loops of cable to dangle from the connector or cable management system, because this stresses the cable at the fastening point.
Chapter 11: Maintaining Hardware Components CAUTION: Failure to handle DPCs as specified in this document can cause irreparable damage. This section discusses how to hold DPCs in both the vertical and horizontal positions.
MX240 Ethernet Services Router Hardware Guide NOTE: A DPC weighs 13.1 lb (5.9 kg). Be prepared to accept the full weight of the DPC as you lift it. To hold a DPC vertically: 1. Orient the DPC so that the faceplate faces you. To verify orientation, confirm that the text on the DPC is right-side up and the electromagnetic interference (EMI) strip is on the right-hand side. 2. Place one hand around the DPC faceplate about a quarter of the way down from the top edge.
Chapter 11: Maintaining Hardware Components Never carry the DPC by the faceplate with only one hand. Do not rest any edge of a DPC directly against a hard surface (see Figure 34 on page 77). Do not stack DPCs. Figure 34: Do Not Rest the DPC on an Edge If you must rest the DPC temporarily on an edge while changing its orientation between vertical and horizontal, use your hand as a cushion between the edge and the surface.
MX240 Ethernet Services Router Hardware Guide If you must insert the DPC into a bag by yourself, first lay the DPC horizontally on a flat, stable surface, sheet metal side down. Orient the DPC with the faceplate facing you. Carefully insert the DPC connector edge into the opening of the bag, and pull the bag toward you to cover the DPC. Never stack a DPC under or on top of any other component.
Chapter 12 Troubleshooting Hardware Components This chapter describes how to troubleshoot problems with hardware components installed in the router. If you encounter software problems, or problems with hardware components not discussed here, contact the Juniper Networks Technical Assistance Center (JTAC) as described in “Requesting Technical Support” on page xxvii.
MX240 Ethernet Services Router Hardware Guide You enter CLI commands on one or more external management devices connected to ports on the Routing Engine. For more information about the Routing Engine ports, see “Routing Engine Interface Ports” on page 16. For information about using the CLI to display details about alarms generated by interfaces and hardware components, see “Chassis and Interface Alarm Messages” on page 80.
Chapter 12: Troubleshooting Hardware Components ■ 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 alarm conditions. 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.
MX240 Ethernet Services Router Hardware Guide 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, HDD, ONLINE, and FAIL on each Routing Engine faceplate indicate the status of the Routing Engine and hard disk drive. For more information, see Table 10 on page 16. ■ Power supply LEDs—Two LEDs on each power supply faceplate indicate the status of that power supply.
Chapter 12: Troubleshooting Hardware Components ■ See “Maintaining Cooling System Components” on page 68. If the fans are not functioning normally, follow these guidelines to troubleshoot the fans: ■ If the red alarm LED on the craft interface lights, use the CLI to get information about the source of an alarm condition: user@host> show chassis alarms. For information about alarms, see “Alarm LEDs and Alarm Cutoff/Lamp Test Button” on page 18.
MX240 Ethernet Services Router Hardware Guide Total RLDRAM Total DDR DRAM Start time: Uptime: Slot 2 information: State Temperature Total CPU DRAM Total RLDRAM Total DDR DRAM Start time: Uptime: 256 MB 4096 MB 2007-12-06 11:33:01 PST 4 hours, 34 minutes, 48 seconds Online degrees C / 91 degrees F MB MB MB 2007-12-06 11:33:05 PST 4 hours, 34 minutes, 44 seconds 33 1024 256 4096 For further description of the output from the commands, see the JUNOS System Basics and Services Command Reference.
Chapter 12: Troubleshooting Hardware Components Temperature DC output OK OK If a power supply is not functioning normally, perform the following steps to diagnose and correct the problem: ■ If a red alarm condition occurs, issue the show chassis alarms command to determine the source of the problem. ■ If all power supplies have failed, the system temperature might have exceeded the threshold, causing the system to shut down.
MX240 Ethernet Services Router Hardware Guide 86 ■ Troubleshooting the Power System
Chapter 13 Replacing Hardware Components This chapter explains how to replace hardware components on the router.
MX240 Ethernet Services Router Hardware Guide Table 23: Field-Replaceable Units Hot-Removable and Hot-Insertable FRUs Hot-Pluggable FRUs Air filter Master Switch Control Board (SCB) (if redundant) Craft interface Master Routing Engine (if redundant) Backup Switch Control Board (SCB) (if redundant) Switch Control Board (SCB) (nonredundant) Backup Routing Engine (if redundant) Routing Engine (nonredundant) Dense Port Concentrators (DPCs) AC and DC power supplies (if redundant) Fan tray Tools and Par
Chapter 13: Replacing Hardware Components Table 24: Tools and Parts Required (continued) Tool or part Components Phillips (+) screwdrivers, numbers 1 and 2 Air filter Routing Engine Craft interface SCB Cables and connectors Fan tray Rubber safety cap DPC Wire cutters Cables and connectors DC power supply Replacing the Craft Interface The craft interface is located above the DPC card cage, as shown in Figure 1 on page 6.
MX240 Ethernet Services Router Hardware Guide 4. Grasp the craft interface faceplate and carefully tilt it toward you until it is horizontal. 5. Disconnect the ribbon cable from the back of the faceplate by gently pressing on both sides of the latch with your thumb and forefinger. Remove the craft interface from the chassis. Figure 36: Removing the Craft Interface Installing the Craft Interface To install the craft interface (see Figure 37 on page 91): 90 ■ 1.
Chapter 13: Replacing Hardware Components Figure 37: Installing a Craft Interface Replacing Alarm Relay Wires The alarm relay wires connect external alarm-reporting devices to the RED and YELLOW relay contacts on the craft interface. The terminal blocks that plug into the alarm relay contacts are supplied with the router. The terminal blocks accept wire of any gauge between 28-AWG and 14-AWG (0.08 and 2.08 mm2). Use the wire gauge appropriate for the external device you are connecting.
MX240 Ethernet Services Router Hardware Guide Connecting the Alarm Relay Wires To connect the alarm relay wires between a router and an alarm-reporting device (see Figure 38 on page 91): 1. Prepare the required length of replacement wire with gauge between 28-AWG and 14-AWG (0.08 and 2.08 mm2). 2. Insert the replacement wires into the slots in the front of the block. Use a 2.5-mm flat-blade screwdriver to tighten the screws and secure the wire. 3.
Chapter 13: Replacing Hardware Components WARNING: To avoid injury, keep tools and your fingers away from the fans as you slide the fan tray out of the chassis. The fans might still be spinning. 4. Press the latch located on the inside of the fan tray to release it from the chassis. 5. Place one hand under the fan tray to support it and pull the fan tray completely out of the chassis.
MX240 Ethernet Services Router Hardware Guide Figure 40: Installing the Fan Tray in an MX240 Router Replacing the Air Filter The router has one air filter that installs vertically in the rear of the chassis. The air filter is hot-insertable and hot-removable. The air filter is located in the rear of the chassis on the left side. The air filter weighs approximately 1 lb (0.5 kg).
Chapter 13: Replacing Hardware Components To remove the air filter (see Figure 41 on page 95): 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. Loosen the captive screws on the air filter cover. 3. Remove the air filter cover. 4. Slide the air filter out of the chassis.
MX240 Ethernet Services Router Hardware Guide Figure 42: Installing the Air Filter in an MX240 Router Replacing Host Subsystem Components To replace a host subsystem, use the following procedures: ■ Taking the Host Subsystem Offline on page 96 ■ Replacing an SCB on page 97 Taking the Host Subsystem Offline The host subsystem is taken offline and brought online as a unit. Before you replace an SCB or a Routing Engine, you must take the host subsystem offline. The host subsystem is hot-pluggable.
Chapter 13: Replacing Hardware Components 1. Determine whether the host subsystem is functioning as the master or as the backup, using one of the two following methods: ■ Check the Routing Engine LEDs on the craft interface. If the green RE MASTER LED is lit, the corresponding host subsystem is functioning as the master. ■ Issue the following command.
MX240 Ethernet Services Router Hardware Guide “Taking the Host Subsystem Offline” on page 96). To replace an SCB, use the following procedures: ■ Operating and Positioning the SCB Ejectors on page 98 ■ Removing an SCB on page 99 ■ Installing an SCB on page 100 Operating and Positioning the SCB Ejectors 98 ■ ■ When removing or inserting an SCB, ensure that the SCBs or blank panels in adjacent slots are fully inserted to avoid hitting them with the ejector handles.
Chapter 13: Replacing Hardware Components Removing an SCB To remove an SCB (see Figure 43 on page 99): NOTE: You can remove the SCB and Routing Engine as a unit, or remove the Routing Engine separately. 1. Place an electrostatic bag or antistatic mat on a flat, stable surface. 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.
MX240 Ethernet Services Router Hardware Guide Installing an SCB To install an SCB (see Figure 44 on page 102): 100 ■ 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. Carefully align the sides of the SCB with the guides inside the chassis. 3.
Chapter 13: Replacing Hardware Components To check the status of the SCB, use the CLI command: user@host> show chassis environment cb CB 0 status: State Temperature Power 1 1.2 V 1.5 V 1.8 V 2.5 V 3.3 V 5.0 V 12.0 V 1.25 V 3.3 V SM3 5 V RE 12 V RE Power 2 11.3 V bias PEM 4.6 V bias MidPlane 11.3 V bias FPD 11.3 V bias POE 0 11.3 V bias POE 1 Bus Revision FPGA Revision CB 1 status: State Temperature Power 1 1.2 V 1.5 V 1.8 V 2.5 V 3.3 V 5.0 V 12.0 V 1.25 V 3.3 V SM3 5 V RE 12 V RE Power 2 11.3 V bias PEM 4.
MX240 Ethernet Services Router Hardware Guide Figure 44: Installing an SCB Replacing a Routing Engine The router can have one or two Routing Engines. They are located in the front of the chassi within the SCBs in the horizontally along the bottom of the chassis in the slots marked 0 and 1. Each Routing Engine weighs approximately 2.4 lb (1.1 kg). The Routing Engine is hot-pluggable. If the router contains a redundant host subsystem, the backup Routing Engine and SCB are hot-removable and hot-insertable.
Chapter 13: Replacing Hardware Components NOTE: To maintain proper airflow through the chassis, do not leave an SCB installed in the chassis without a Routing Engine for extended periods of time. If a Routing Engine is removed, a replacement Routing Engine should be installed as soon as possible. Figure 45: Removing a Routing Engine Installing a Routing Engine To install a Routing Engine into an SCB (see Figure 46 on page 104): 1. Ensure that the ejector handles are not in the locked position.
MX240 Ethernet Services Router Hardware Guide user@host> show chassis routing-engine Routing Engine status: Slot 0: Current state Master ... For more information about using the CLI, see the JUNOS software manuals. Figure 46: Installing a Routing Engine Replacing Connections to Routing Engine Interface Ports You can connect the router to external management devices (see Figure 47 on page 104).
Chapter 13: Replacing Hardware Components Replacing the Management Ethernet Cable 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. Figure 48: Cable Connectors Removing the Management Ethernet Cable To remove the managment Ethernet cable: 1.
MX240 Ethernet Services Router Hardware Guide Connecting the Cable to a Management Console or Auxiliary Device To connect a serial cable to a management console or auxiliary device: 1. Plug the RJ-45 end of the replacement serial cable into the CONSOLE or AUX port. Figure 47 on page 104 shows the external device ports on the Routing Engine. 2. Plug the female DB-9 end into the console or auxiliary device's serial port. 3. Turn on the power to the console or auxiliary device.
Chapter 13: Replacing Hardware Components user@host>request chassis fpc slot slot-number offline For more information about the command, see the JUNOS System Basics and Services Command Reference. 5. Disconnect the cables from the DPC. If the DPC uses fiber-optic cable, immediately cover each transceiver and the end of each cable with a rubber safety cap. Arrange the disconnected cables in the cable management system to prevent the cables from developing stress points.
MX240 Ethernet Services Router Hardware Guide CAUTION: After removing a DPC from the chassis, wait at least 30 seconds before reinserting it, removing a DPC from a different slot, or inserting a DPC into a different slot. Figure 49: Removing a DPC Installing a DPC To install a DPC (see Figure 50 on page 110): 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.
Chapter 13: Replacing Hardware Components 10. Insert the appropriate cables into the cable connector ports on each DPC (see Figure 51 on page 110). Secure the cables so that they are not supporting their own weight. Place excess cable out of the way in a neatly coiled loop, using the cable management system. Placing fasteners on a loop helps to maintain its shape. CAUTION: Do not let fiber-optic cable hang free from the connector.
MX240 Ethernet Services Router Hardware Guide Figure 50: Installing a DPC Figure 51: Attaching a Cable to a DPC Removing an SFP or XFP Transceiver Small form-factor pluggable (SFPs) and XFPs are optical transceivers that are installed in a DPC. SFPs and XFPs are hot-insertable and hot-removable. Removing an SFP or XFP does not interrupt DPC functioning, but the removed SFP or XFP no longer receives or transmits data. To remove an SFP or XFP transceiver (see Figure 52 on page 111): 110 ■ 1.
Chapter 13: Replacing Hardware Components WARNING: Do not look directly into a fiber-optic transceiver or into the end of a fiber-optic cable. Fiber-optic transceivers contain laser light sources that can damage your eyes. 4. Remove the cable connector plugged into the transceiver. 5. Carefully drape the disconnected cable over the bobbins in the cable management system to prevent the cable from developing stress points. CAUTION: Avoid bending fiber-optic cable beyond its minimum bend radius.
MX240 Ethernet Services Router Hardware Guide Installing an SFP or XFP Transceiver To install an SFP or XFP: 1. Attach an ESD wrist strap to your bare wrist and connect the wrist strap to one of the ESD points on the chassis. 2. Take each transceiver to be installed out of its electrostatic bag and identify the slot on the DPC where it will be installed. 3. Verify that each transceiver is covered by a rubber safety cap. If it is not, cover the transceiver with a safety cap. 4.
Chapter 13: Replacing Hardware Components ■ Replacing an AC Power Cord on page 118 ■ Replacing a DC Power Supply Cable on page 119 Removing an AC Power Supply The power supplies are located at the rear of the chassis. Each AC power supply weighs approximately 5.0 lb (2.3 kg). CAUTION: Do not leave a power supply slot empty for more than 30 minutes while the router is operational. For proper airflow, the power supply must remain in the chassis, or a blank panel must be used in an empty slot.
MX240 Ethernet Services Router Hardware Guide Installing an AC Power Supply To install an AC power supply (see Figure 54 on page 114): 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. Move the AC switch next to the appliance inlet on the power supply to the off position (O). 3.
Chapter 13: Replacing Hardware Components The power supplies are located at the rear of the chassis. Each DC power supply weighs approximately 3.8 lb (1.7 kg). CAUTION: Do not leave a power supply slot empty for more than 30 minutes while the router is operational. For proper airflow, the power supply must remain in the chassis, or a blank panel must be used in an empty slot. NOTE: After powering off a power supply, wait at least 60 seconds before turning it back on.
MX240 Ethernet Services Router Hardware Guide Figure 55: Removing a DC Power Supply from an MX240 Router Installing a DC Power Supply 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.
Chapter 13: Replacing Hardware Components 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.
MX240 Ethernet Services Router Hardware Guide Figure 56: Installing a DC Power Supply in an MX240 Router Figure 57: Connecting DC Power to the Router Replacing an AC Power Cord To replace an AC power cord: 118 ■ ■ Disconnecting an AC Power Cord on page 119 ■ Connecting an AC Power Supply Cord on page 119 Replacing Power System Components
Chapter 13: Replacing Hardware Components Disconnecting an AC Power Cord WARNING: Before working on the router or near power supplies, unplug the power cord from an AC router. To disconnect the AC power cord: 1. Unplug the power cord from the power source receptacle. 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.
MX240 Ethernet Services Router Hardware Guide Disconnecting a DC Power Supply Cable To disconnect a power cable for a DC power supply: 1. Switch the dedicated facility circuit breaker to the off position. Make sure that the voltage across the DC power source cable leads is 0 V and that there is no chance that the cables might become active during the removal process. 2. Remove the power cable from the external DC power source. 3.
Chapter 13: Replacing Hardware Components Figure 58: Connecting Power Cables to the DC Power Supply 4. Replace the clear plastic cover over the terminal studs on the faceplate. 5. Verify that the DC power cable is connected correctly, that it does not touch or block access to router components, and that it does not drape where people could trip on it. 6. Attach the power cable to the DC power source. 7. Turn on the dedicated facility circuit breaker to the power supply. 8.
MX240 Ethernet Services Router Hardware Guide 2. Loosen the captive screws on either side of the chassis. 3. Remove the cable manager. Figure 59: Removing or Installing the Cable Management System Installing the Cable Management System To install the cable management system (see Figure 59 on page 122): 122 ■ 1. Position the cable management system on the front sides of the chassis. 2. Insert the tabs into the slots. 3. Tighten the screws completely.
Part 4 Appendixes ■ Safety and Regulatory Compliance Information on page 125 ■ Physical Specifications on page 161 ■ Router Environmental Specifications on page 163 ■ Power Guidelines, Requirements, and Specifications on page 165 ■ Cable and Wire Guidelines and Specifications on page 179 ■ Cable Connector Pinouts on page 185 ■ Installing the Router Without a Mechanical Lift on page 187 ■ Contacting Customer Support and Returning Hardware on page 197 Appendixes ■ 123
MX240 Ethernet Services Router Hardware Guide 124 ■ Appendixes
Appendix A Safety and Regulatory Compliance Information To install and use the router safely, follow proper safety procedures.
MX240 Ethernet Services Router Hardware Guide Attention Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers posés par les circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Warnung Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu einer Körperverletzung führen könnte.
Appendix A: Safety and Regulatory Compliance Information General Safety Guidelines and Warnings The following guidelines help ensure your safety and protect the router from damage. The list of guidelines might not address all potentially hazardous situations in your working environment, so be alert and exercise good judgment at all times. ■ Perform only the procedures explicitly described in this manual. Make sure that only authorized service personnel perform other system services.
MX240 Ethernet Services Router Hardware Guide Waarschuwing Installatie en reparaties mogen uitsluitend door getraind en bevoegd personeel uitgevoerd worden. Varoitus Ainoastaan koulutettu ja pätevä henkilökunta saa asentaa tai vaihtaa tämän laitteen. Attention Tout installation ou remplacement de l'appareil doit être réalisé par du personnel qualifié et compétent. Warnung Gerät nur von geschultem, qualifiziertem Personal installieren oder auswechseln lassen.
Appendix A: Safety and Regulatory Compliance Information sécurité. L'accès aux zones de sécurité est sous le contrôle de l'autorité responsable de l'emplacement. Warnung Diese Einheit ist zur Installation in Bereichen mit beschränktem Zutritt vorgesehen. Ein Bereich mit beschränktem Zutritt ist ein Bereich, zu dem nur Wartungspersonal mit einem Spezialwerkzeugs, Schloß und Schlüssel oder anderer Sicherheitsvorkehrungen Zugang hat, und der von dem für die Anlage zuständigen Gremium kontrolliert wird.
MX240 Ethernet Services Router Hardware Guide Preventing Electrostatic Discharge Damage Many router hardware components are sensitive to damage from static electricity. Some components can be impaired by voltages as low as 30 V. You can easily generate potentially damaging static voltages whenever you handle plastic or foam packing material or if you move components across plastic or carpets.
Appendix A: Safety and Regulatory Compliance Information In addition, establish procedures to protect your equipment in the event of a fire emergency. Juniper Networks products should be installed in an environment suitable for electronic equipment. We recommend that fire suppression equipment be available in the event of a fire in the vicinity of the equipment, and that all local fire, safety, and electrical codes and ordinances be observed when installing and operating your equipment.
MX240 Ethernet Services Router Hardware Guide Chassis-Lifting Guidelines The weight of a fully configured chassis is about 128 lb (58.1 kg). Observe the following guidelines for lifting and moving the router: ■ Before moving the router, read the guidelines in “Preparing the Site for Router Installation” on page 29 to verify that the intended site meets the specified power, environmental, and clearance requirements. ■ Do not attempt to lift a fully configured router by yourself.
Appendix A: Safety and Regulatory Compliance Information Rack-Mounting Requirements and Warnings Ensure that the equipment rack into which the router is installed is evenly and securely supported, to avoid the hazardous condition that could result from uneven mechanical loading. WARNING: To prevent bodily injury when mounting or servicing the router in a rack, take the following precautions to ensure that the system remains stable.
MX240 Ethernet Services Router Hardware Guide Attention Pour éviter toute blessure corporelle pendant les opérations de montage ou de réparation de cette unité en casier, il convient de prendre des précautions spéciales afin de maintenir la stabilité du système. Les directives ci-dessous sont destinées à assurer la protection du personnel: ■ Le rack sur lequel est monté le Juniper Networks router doit être fixé à la structure du bâtiment.
Appendix A: Safety and Regulatory Compliance Information ■ Juniper Networks router må installeres i et stativ som er forankret til bygningsstrukturen. ■ Denne enheten bør monteres nederst i kabinettet hvis dette er den eneste enheten i kabinettet. ■ Ved montering av denne enheten i et kabinett som er delvis fylt, skal kabinettet lastes fra bunnen og opp med den tyngste komponenten nederst i kabinettet.
MX240 Ethernet Services Router Hardware Guide ■ Juniper Networks router måste installeras i en ställning som är förankrad i byggnadens struktur. ■ Om denna enhet är den enda enheten på ställningen skall den installeras längst ned på ställningen. ■ Om denna enhet installeras på en delvis fylld ställning skall ställningen fyllas nedifrån och upp, med de tyngsta enheterna längst ned på ställningen.
Appendix A: Safety and Regulatory Compliance Information ■ Laser Beam Warning on page 138 ■ Radiation from Open Port Apertures Warning on page 139 General Laser Safety Guidelines When working around PICs, observe the following safety guidelines to prevent eye injury: ■ Do not look into unterminated ports or at fibers that connect to unknown sources. ■ Do not examine unterminated optical ports with optical instruments. ■ Avoid direct exposure to the beam.
MX240 Ethernet Services Router Hardware Guide Varoitus Luokan 1 valodiodituote. Attention Alarme de produit LED Class I. Warnung Class 1 LED-Produktwarnung. Avvertenza Avvertenza prodotto LED di Classe 1. Advarsel LED-produkt i klasse 1. Aviso Produto de classe 1 com LED. ¡Atención! Aviso sobre producto LED de Clase 1. Varning! Lysdiodprodukt av klass 1. Laser Beam Warning WARNING: Do not stare into the laser beam or view it directly with optical instruments.
Appendix A: Safety and Regulatory Compliance Information Radiation from Open Port Apertures Warning WARNING: Because invisible radiation might be emitted from the aperture of the port when no fiber cable is connected, avoid exposure to radiation and do not stare into open apertures. Waarschuwing Aangezien onzichtbare straling vanuit de opening van de poort kan komen als er geen fiberkabel aangesloten is, dient blootstelling aan straling en het kijken in open openingen vermeden te worden.
MX240 Ethernet Services Router Hardware Guide ■ Operating Temperature Warning on page 142 ■ Product Disposal Warning on page 143 Battery Handling Warning WARNING: Replacing the battery incorrectly might result in an explosion. Replace the battery only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer's instructions. Waarschuwing Er is ontploffingsgevaar als de batterij verkeerd vervangen wordt.
Appendix A: Safety and Regulatory Compliance Information Jewelry Removal Warning WARNING: Before working on equipment that is connected to power lines, remove jewelry, including rings, necklaces, and watches. Metal objects heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. Waarschuwing Alvorens aan apparatuur te werken die met elektrische leidingen is verbonden, sieraden (inclusief ringen, kettingen en horloges) verwijderen.
MX240 Ethernet Services Router Hardware Guide de kopplas ihop med ström och jord och kan förorsaka allvarliga brännskador; metallobjekt kan också sammansvetsas med kontakterna. Lightning Activity Warning WARNING: Do not work on the system or connect or disconnect cables during periods of lightning activity. Waarschuwing Tijdens onweer dat gepaard gaat met bliksem, dient u niet aan het systeem te werken of kabels aan te sluiten of te ontkoppelen.
Appendix A: Safety and Regulatory Compliance Information te voorkomen dat de luchtstroom wordt beperkt, dient er minstens 15,2 cm speling rond de ventilatie-openingen te zijn. Varoitus Ettei Juniper Networks router-sarjan reititin ylikuumentuisi, sitä ei saa käyttää tilassa, jonka lämpötila ylittää korkeimman suositellun ympäristölämpötilan 40οC. Ettei ilmanvaihto estyisi, tuuletusaukkojen ympärille on jätettävä ainakin 15,2 cm tilaa.
MX240 Ethernet Services Router Hardware Guide Waarschuwing Dit produkt dient volgens alle landelijke wetten en voorschriften te worden afgedankt. Varoitus Tämän tuotteen lopullisesta hävittämisestä tulee huolehtia kaikkia valtakunnallisia lakeja ja säännöksiä noudattaen. Attention La mise au rebut définitive de ce produit doit être effectuée conformément à toutes les lois et réglementations en vigueur. Warnung Dieses Produkt muß den geltenden Gesetzen und Vorschriften entsprechend entsorgt werden.
Appendix A: Safety and Regulatory Compliance Information General Electrical Safety Guidelines and Warnings ■ Install the router in compliance with the following local, national, or international electrical codes: ■ United States—National Fire Protection Association (NFPA 70), United States National Electrical Code. ■ Canada—Canadian Electrical Code, Part 1, CSA C22.1. ■ Other countries—International Electromechanical Commission (IEC) 60364, Part 1 through Part 7. ■ Evaluated to the TN power system.
MX240 Ethernet Services Router Hardware Guide Avvertenza Questa apparecchiatura deve essere collegata a massa. Accertarsi che il dispositivo host sia collegato alla massa di terra durante il normale utilizzo. Advarsel Dette utstyret skal jordes. Forviss deg om vertsterminalen er jordet ved normalt bruk. Aviso Este equipamento deverá estar ligado à terra. Certifique-se que o host se encontra ligado à terra durante a sua utilização normal. ¡Atención! Este equipo debe conectarse a tierra.
Appendix A: Safety and Regulatory Compliance Information Aviso Este dispositivo possui mais do que uma conexão de fonte de alimentação de energia; para poder remover a fonte de alimentação de energia, deverão ser desconectadas todas as conexões existentes. ¡Atención! Esta unidad tiene más de una conexión de suministros de alimentación; para eliminar la alimentación por completo, deben desconectarse completamente todas las conexiones.
MX240 Ethernet Services Router Hardware Guide Varning! Innan du arbetar med ett chassi eller nära strömförsörjningsenheter skall du för växelströmsenheter dra ur nätsladden och för likströmsenheter bryta strömmen vid överspänningsskyddet. TN Power Warning WARNING: The router is designed to work with TN power systems. Waarschuwing Het apparaat is ontworpen om te functioneren met TN energiesystemen. Varoitus Koje on suunniteltu toimimaan TN-sähkövoimajärjestelmien yhteydessä.
Appendix A: Safety and Regulatory Compliance Information 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.
MX240 Ethernet Services Router Hardware Guide accordance with the National Electrical Code in the US and the Canadian Electrical Code in Canada. ■ Run two wires from the circuit breaker box to a source of 48 VDC. Use appropriate gauge wire to handle up to 50 A. ■ Be sure to connect the ground wire or conduit to a solid office (earth) ground. A closed loop ring is recommended for terminating the ground conductor at the ground stud.
Appendix A: Safety and Regulatory Compliance Information ¡Atención! Emplee sólo conductores de cobre. Varning! Använd endast ledare av koppar. DC Power Disconnection Warning WARNING: Before performing any of the following procedures, ensure that power is removed from the DC circuit.
MX240 Ethernet Services Router Hardware Guide que toda a corrente foi DESLIGADA, localize o disjuntor no painel que serve o circuito de corrente contínua e coloque-o na posição OFF (Desligado), segurando nessa posição a manivela do interruptor do disjuntor com fita isoladora. ¡Atención! Antes de proceder con los siguientes pasos, comprobar que la alimentación del circuito de corriente continua (CC) esté cortada (OFF).
Appendix A: Safety and Regulatory Compliance Information Aviso Ao instalar a unidade, a ligação à terra deverá ser sempre a primeira a ser ligada, e a última a ser desligada. ¡Atención! Al instalar el equipo, conectar la tierra la primera y desconectarla la última. Varning! Vid installation av enheten måste jordledningen alltid anslutas först och kopplas bort sist. DC Power Wiring Sequence Warning WARNING: Wire the DC power supply using the appropriate lugs.
MX240 Ethernet Services Router Hardware Guide Aviso Ate con alambre la fuente de potencia cc Usando los terminales apropiados en el extremo del cableado. Al conectar potencia, la secuencia apropiada del cableado se muele para moler, +RTN a +RTN, entonces -48 V a -48 V. Al desconectar potencia, la secuencia apropiada del cableado es -48 V a -48 V, +RTN a +RTN, entonces molió para moler. Observe que el alambre de tierra se debe conectar siempre primero y desconectar por último.
Appendix A: Safety and Regulatory Compliance Information Avvertenza Quando occorre usare trecce, usare connettori omologati, come quelli a occhiello o a forcella con linguette rivolte verso l'alto. I connettori devono avere la misura adatta per il cablaggio e devono serrare sia l'isolante che il conduttore. Advarsel Hvis det er nødvendig med flertrådede ledninger, brukes godkjente ledningsavslutninger, som for eksempel lukket sløyfe eller spadetype med oppoverbøyde kabelsko.
MX240 Ethernet Services Router Hardware Guide ■ ■ ■ ■ 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 A (USA) ■ VCCI Class A (Japan) Immunity ■ EN-61000-3-2 Power Line Harmonics ■ EN-61000-3-3 Voltage Fluctuations and Flicker ■ EN-61000-4-2 ESD ■ EN-61000-4-3 Radiated Immunity ■ EN-61000-4-4 EFT ■ EN-61000-4-5 Surge ■ EN-61000-4-6 Low Frequency Common Immunity ■ EN-61000-4-11 Vo
Appendix A: Safety and Regulatory Compliance Information Compliance Statements for EMC Requirements Canada This Class A digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada. European Community This is a Class A product. In a domestic environment this product might cause radio interference in which case the user might be required to take adequate measures.
MX240 Ethernet Services Router Hardware Guide Declaration of Conformity Japan 158 ■ Agency Approvals and Compliance
Appendix A: Safety and Regulatory Compliance Information Translation: This is a Class A product. In a domestic environment this product might cause radio interference in which case the user might be required to take adequate measures. VCCI-A United States The router has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
MX240 Ethernet Services Router Hardware Guide 160 ■ Agency Approvals and Compliance
Appendix B Physical Specifications ■ Physical Specifications on page 161 Physical Specifications Table 25 on page 161 summarizes the physical specifications for the router chassis. Table 25: Physical Specifications Description Value Chassis dimensions 8.71 in. (22.1 cm) high 17.45 in. (44.3 cm) wide 24.5 in. (62.2 cm) deep (from front-mounting bracket to chassis rear) Total depth (including cable management system) 27.75 in. (70.
MX240 Ethernet Services Router Hardware Guide 162 ■ Physical Specifications
Appendix C Router Environmental Specifications ■ Router Environmental Specifications on page 163 Router Environmental Specifications Table 26 on page 163 specifies the environmental specifications required for normal router operation. In addition, the site should be as dust-free as possible. For more information, see “Maintaining Hardware Components” on page 67.
MX240 Ethernet Services Router Hardware Guide 164 ■ Router Environmental Specifications
Appendix D Power Guidelines, Requirements, and Specifications ■ Chassis Grounding Specifications on page 165 ■ DC Power Specifications and Requirements on page 166 ■ AC Power Specifications and Requirements on page 171 ■ Site Electrical Wiring Guidelines on page 176 Chassis Grounding Specifications To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, the router must be adequately grounded before power is connected.
MX240 Ethernet Services Router Hardware Guide Figure 61: Grounding Cable Lug CAUTION: Before router installation begins, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the router. NOTE: The same cable lug is used for the DC power cables. Grouding Cable Specification The grounding cable that you provide must meet the specifications in Table 27 on page 166.
Appendix D: Power Guidelines, Requirements, and Specifications DC Power System Electrical Specifications Table 28 on page 167 lists the DC power system electrical specifications. Table 28: DC Power System Electrical Specifications Item Specification DC input voltage Operating range: –40.5 to –72 VDC DC system current rating 31 A @ –48 VDC per input (maximum) DC system input power 29.
MX240 Ethernet Services Router Hardware Guide power supply configurations. The base DC-powered router includes the midplane, craft interface, and fan tray running at normal speed. Table 30: DC-Powered Base Router Power Requirements Power Requirement (Watts) Current Requirement (Amps @ –48 VDC) One DC power supply (nonredundant configuration) 50 W (approximate) 1.04 A (approximate) Two DC power supplies (redundant configuration) 66 W (approximate) 1.
Appendix D: Power Guidelines, Requirements, and Specifications 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 other than –48 VDC (based on maximum configuration; applies to DC power supply only): (–54 VDC input) * (input current X) = (–48 VDC input) * (input current Y) 54 * X = 48 * 29.58 A X = 48 * 29.58 A/54 = 26.
MX240 Ethernet Services Router Hardware Guide DC Power Cable Specifications Figure 62 on page 170 shows a typical DC source cabling arrangement. Figure 62: Typical DC Source Cabling to the Router 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.
Appendix D: Power Guidelines, Requirements, and Specifications DC Power Cable Lug Specifications The accessory box shipped with the router includes the cable lugs that attach to the terminal studs of each power supply (see Figure 63 on page 171). Figure 63: DC Power Cable Lug CAUTION: Before router installation begins, a licensed electrician must attach a cable lug to the grounding and power cables that you supply. A cable with an incorrectly attached lug can damage the router.
MX240 Ethernet Services Router Hardware Guide AC Power Specifications ■ AC Power System Electrical Specifications on page 172 ■ AC Power Supply Electrical Specifications on page 172 AC Power System Electrical Specifications Table 33 on page 172 lists the AC power system electrical specifications.
Appendix D: Power Guidelines, Requirements, and Specifications For AC-powered routers, you can use the information in Table 35 on page 173 and Table 36 on page 173 to calculate the power consumption and thermal output for your hardware configuration. Table 35 on page 173 lists the power requirements for base AC-powered routers operating under typical voltage conditions and includes various power supply configurations.
MX240 Ethernet Services Router Hardware Guide 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 AC-powered low-line configuration @ 110 V with one host subsystem and a third DPC in the multifunction slot (includes 85% efficiency): Base router with four power supplies + fan tray at full speed + 1 SCB + 1 Routing Engine + 3 DPCs 520 W + 24 W + 176 W + 106 W + 3 (429 W) = 520 W + 24 W + 176 W + 106 W + 1287
Appendix D: Power Guidelines, Requirements, and Specifications Table 37 on page 175 provides specifications and Figure 64 on page 175 depicts the plug on the AC power cord provided for each country or region.
MX240 Ethernet Services Router Hardware Guide NOTE: In North America, AC power cords must not exceed 4.5 m (approximately 14.75 ft) in length, to comply with National Electrical Code (NEC) Sections 400-8 (NFPA 75, 5-2.2) and 210-52, and Canadian Electrical Code (CEC) Section 4-010(3). The cords supplied with the router are in compliance. WARNING: The router is pluggable type A equipment installed in a restricted-access location.
Appendix D: Power Guidelines, Requirements, and Specifications advice. Strong sources of electromagnetic interference (EMI) can destroy the signal drivers and receivers in the router and conduct power surges over the lines into the equipment, resulting in an electrical hazard. It is particularly important to provide a properly grounded and shielded environment and to use electrical surge-suppression devices.
MX240 Ethernet Services Router Hardware Guide 178 ■ Site Electrical Wiring Guidelines
Appendix E Cable and Wire Guidelines and Specifications To prepare for router or component installation, ensure that you have all required cables and wires. ■ Network Cable Specifications and Guidelines on page 179 ■ Routing Engine Interface Cable and Wire Specifications on page 183 Network Cable Specifications and Guidelines The various PICs supported on the router accept different kinds of network cable, including multimode and single-mode fiber-optic cable.
MX240 Ethernet Services Router Hardware Guide Single-mode fiber is so small in diameter that rays of light can reflect internally through one layer only. Interfaces with single-mode optics use lasers as light sources. Lasers generate a single wavelength of light, which travels in a straight line through the single-mode fiber. Compared with multimode fiber, single-mode fiber has higher bandwidth and can carry signals for longer distances. It is consequently more expensive.
Appendix E: Cable and Wire Guidelines and Specifications Calculating Power Budget for Fiber-Optic Cable To ensure that fiber-optic connections have sufficient power for correct operation, calculate the link's power budget, which is the maximum amount of power it can transmit. When you calculate the power budget, you use a worst-case analysis to provide a margin of error, even though all the parts of an actual system do not operate at the worst-case levels.
MX240 Ethernet Services Router Hardware Guide Table 38: Estimated Values for Factors Causing Link Loss (continued) Link-Loss Factor Estimated Link-Loss Value Splice 0.5 dB Fiber attenuation Single-mode—0.5 dB/km Multimode—1 dB/km The following example uses the estimated values in Table 38 on page 181 to calculate link loss (LL) for a 2 km-long multimode link with a power budget (PB) of 13 dB: ■ Fiber attenuation for 2 km @ 1.0 dB/km= 2 dB ■ Loss for five connectors @ 0.5 dB per connector = 5(0.
Appendix E: Cable and Wire Guidelines and Specifications Routing Engine Interface Cable and Wire Specifications Table 39 on page 183 lists the specifications for the cables that connect to management ports and the wires that connect to the alarm relay contacts.
MX240 Ethernet Services Router Hardware Guide 184 ■ Routing Engine Interface Cable and Wire Specifications
Appendix F Cable Connector Pinouts This appendix describes the pinouts for the following cable connectors: ■ RJ-45 Connector Pinouts for the Routing Engine ETHERNET Port on page 185 ■ RJ-45 Connector Pinouts for the Routing Engine AUX and CONSOLE Ports on page 185 RJ-45 Connector Pinouts for the Routing Engine ETHERNET Port The port on the craft interface labeled ETHERNET is an autosensing 10/100-Mbps Ethernet RJ-45 receptacle that accepts an Ethernet cable for connecting the Routing Engine to a manage
MX240 Ethernet Services Router Hardware Guide an auxiliary or console management device. For more information, see “Routing Engine Interface Ports” on page 16. Table 41 on page 186 describes the RJ-45 connector pinout.
Appendix G Installing the Router Without a Mechanical Lift If you cannot use a mechanical lift to install the router (the preferred method), you can install it manually. Before installing the router manually, you must first remove components from the chassis, and you must reinstall the components once the router is installed in the rack. At least two people are needed to safely lift the chassis into the rack or cabinet. With components removed, the chassis weighs approximately 52.0 lb (23.6 kg).
MX240 Ethernet Services Router Hardware Guide how to remove components from the chassis, first from the rear and then from the front: ■ Removing the Power Supplies on page 188 ■ Removing the Fan Tray on page 189 ■ Removing SCBs on page 189 ■ Removing DPCs on page 190 Removing the Power Supplies The power supplies are located at the rear of the chassis. Each AC power supply weighs approximately 5.0 lb (2.3 kg) and each DC power supply weighs approximately 3.8 lb (1.7 kg).
Appendix G: Installing the Router Without a Mechanical Lift Removing the Fan Tray In the rear of the chassis, the fan tray is located on the right of the chassis. The fan tray weighs about 4.2 lb (1.9 kg). To remove the fan tray (see Figure 66 on page 189 ): 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.
MX240 Ethernet Services Router Hardware Guide 4. Simultaneously rotate the ejector handles counterclockwise to unseat the SCB. 5. Grasp the ejector handles and slide the SCB about halfway out of the chassis. 6. Place one hand underneath the SCB to support it and slide it completely out of the chassis. Place it on the antistatic mat. CAUTION: Do not stack hardware components on one another after you remove them. Place each component on an antistatic mat resting on a stable, flat surface. 7.
Appendix G: Installing the Router Without a Mechanical Lift CAUTION: The weight of the DPC is concentrated in the back end. Be prepared to accept the full weight—up to 13.1 lb (5.9 kg)—as you slide the DPC out of the chassis. When the DPC is out of the chassis, do not hold it by the ejector handles, bus bars, or edge connectors. They cannot support its weight. Do not stack DPC on top of one another after removal.
MX240 Ethernet Services Router Hardware Guide Installing the Chassis in the Rack Manually To install the router in the rack (see Figure 69 on page 193): CAUTION: If you are installing more than one router in a rack, install the lowest one first. Installing a router in an upper position in a rack or cabinet requires a lift.
Appendix G: Installing the Router Without a Mechanical Lift Figure 69: Installing the Router in the Rack 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. Reinstalling Components in the Chassis After the router is installed in the rack, you reinstall the removed components before booting and configuring the router.
MX240 Ethernet Services Router Hardware Guide 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. For an AC-powered router, switch the AC switch on the power supply slot to the off position (O). For a DC-powered router, switch the circuit breaker on the power supply to the OFF position.
Appendix G: Installing the Router Without a Mechanical Lift Figure 71: Installing a Fan Tray Reinstalling SCBs To reinstall an SCB (see Figure 72 on page 196): CAUTION: Before removing or replacing an SCB, ensure that the ejector handles are stored vertically and pressed toward the center of the SCB. 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.
MX240 Ethernet Services Router Hardware Guide Figure 72: Installing an SCB Reinstalling DPCs To reinstall a DPC (see Figure 73 on page 196): 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. Place the DPC on an antistatic mat or remove it from its electrostatic bag. 3.
Appendix H Contacting Customer Support and Returning Hardware This appendix describes how to return the router or individual components to Juniper Networks for repair or replacement: ■ Locating Component Serial Numbers on page 197 ■ Contacting Customer Support on page 202 ■ Return Procedure on page 203 ■ Tools and Parts Required on page 204 ■ Packing the Router for Shipment on page 204 ■ Packing Components for Shipment on page 205 Locating Component Serial Numbers Before contacting Juniper Netw
MX240 Ethernet Services Router Hardware Guide PIC 2 Xcvr PIC 3 FPC 2 CPU PIC 0 Xcvr PIC 1 Xcvr PIC 2 Xcvr PIC 3 Fan Tray 0 REV 01 REV 01 REV 06 0 REV 01 0 REV 01 0 REV 01 0 REV 01 BUILTIN 740-014279 BUILTIN 750-018124 710-013713 BUILTIN 740-014279 BUILTIN 740-014279 BUILTIN 740-014279 BUILTIN 710-021113 BUILTIN KB602C3 BUILTIN JY9642 JY9337 BUILTIN KB602BQ BUILTIN KB602BG BUILTIN KBC03W1 BUILTIN JS4641 1x 10GE(LAN/WAN) XFP-10G-LR 1x 10GE(LAN/WAN) DPCE 4x 10GE R DPC PMB 1x 10GE(LAN/WAN) XFP-10G
Appendix H: Contacting Customer Support and Returning Hardware Figure 75: MX240 Chassis Serial Number Label SCB Serial Number Label The serial number is located on the right side of the top of the SCB (see Figure 76 on page 199).
MX240 Ethernet Services Router Hardware Guide DPC Serial Number Label The serial number label is located on the center of the right side of the DPC (see Figure 77 on page 200). Figure 77: DPC Serial Number Label Power Supply Serial Number Labels The serial number label is located on the top of the AC power supply (see Figure 78 on page 201). The serial number label is located on the top of the DC power supply faceplate (see Figure 79 on page 201).
Appendix H: Contacting Customer Support and Returning Hardware Figure 78: AC Power Supply Serial Number Label Figure 79: DC Power Supply Serial Number Label Routing Engine Serial Number Label The serial number label is located on the right side of the top of the Routing Engine (see Figure 80 on page 202).
MX240 Ethernet Services Router Hardware Guide Figure 80: Routing Engine Serial Number Label Contacting Customer Support After you have located the serial numbers of the components you need to return, contact Juniper Networks Technical Assistance Center (JTAC) in one of the following ways. You can contact JTAC 24 hours a day, seven days a week: ■ On the Web, using the Case Manager link at: http://www.juniper.
Appendix H: Contacting Customer Support and Returning Hardware Return Procedure If the problem cannot be resolved by the JTAC technician, a Return Materials Authorization (RMA) is issued. This number is used to track the returned material at the factory and to return repaired or new components to the customer as needed. NOTE: Do not return any component to Juniper Networks, Inc. unless you have first obtained an RMA number. Juniper Networks, Inc.
MX240 Ethernet Services Router Hardware Guide Tools and Parts Required To remove components from the router or the router from a rack, you need the following tools and parts: ■ 2.5 mm flat-blade (–) screwdriver, for detaching alarm relay terminal block ■ 3/8–in.
Appendix H: Contacting Customer Support and Returning Hardware 6. Remove the cables that connect to all external devices. For instructions, see “Replacing Connections to Routing Engine Interface Ports” on page 104. 7. Remove all field replaceable units (FRUs) from the router. 8. Remove the router from the rack: 9. ■ If you are using a mechanical lift, place the lift platform under the router, unscrew and remove the mounting screws from the rack, and move the router to the shipping crate.
MX240 Ethernet Services Router Hardware Guide 206 ■ Packing Components for Shipment
Part 5 Index ■ Index on page 209 Index ■ 207
MX240 Ethernet Services Router Hardware Guide 208 ■ Index
Index Symbols #, comments in configuration statements...................xix ( ), in syntax descriptions............................................xix < >, in syntax descriptions.......................................xix [ ], in configuration statements...................................xix { }, in configuration statements..................................xix | (pipe), in syntax descriptions....................................xix ATM analyzer, use of....................................................
MX240 Ethernet Services Router Hardware Guide grounding See DC power and grounding cables power See AC power cord cable management system description............................................................17 fiber-optic cable, use with.....................................74 installation..........................................................122 removal..............................................................121 case number, for JTAC...............................................
Index replacing.............................................................106 status, checking........................................72, 74, 83 DPCs components..........................................................10 troubleshooting.....................................................83 G grounding (electrical) specifications AC-powered router..............................................165 DC-powered router.............................................165 grounding cables lug.......................
MX240 Ethernet Services Router Hardware Guide maintenance See maintenance guidelines DPC...............................................................74 packing router for shipment.....................................204 interface network See DPC interference electromagnetic..................................................176 radio frequency...................................................176 modal dispersion in fiber-optic cable.........................180 mode loss, higher-order.....................
Index powering on the router..........................................55, 58 pinouts for cable connections.............................185 ports.....................................................................16 description.....................................................16 See also auxiliary port, console port, Ethernet port replacing.............................................................102 status indicator lights............................................14 taking offline................
MX240 Ethernet Services Router Hardware Guide specifications AC power cord....................................................174 cable...................................................................179 power..........................................................170 Routing Engine management ports..............183 See also cable, DPC clearance around rack...........................................32 electrical.............................................................174 cable and wiring...........
