Instruction/ maintenance manual of the product MX240 Juniper Networks
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MX240 ™ Ethernet Services Router Hardware Guide Juniper Networks, Inc. 1194 North Mathilda Avenue Sunnyvale, California 94089 USA 408-745-2000 www.juniper.
This product includes the Envoy SNMP Engine, developed by Epilogue Technology, an Integrated Systems Company. Copyright © 1986-1997, Epilogue Technology Corporation. All rights reserved. This program and its documentation were developed at private expense, and no part of them is in the public domain.
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Table of Contents About This Guide xvii Objectives ....................................................................................................xvii Audience ......................................................................................
SCB LEDs ................................................................................................20 Fan LEDs ................................................................................................20 Alarm Relay Contacts ..............
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 .
Chapter 12 Troubleshooting Hardware Components 79 Overview of Troubleshooting Resources ........................................................79 Juniper Networks Technical Assistance Center ........................................79 Command-Line Interface .
Replacing DPCs and Transceivers ................................................................106 Replacing a DPC ...................................................................................106 Removing a DPC .................................
Lightning Activity Warning .............................................................142 Operating Temperature Warning ....................................................142 Product Disposal Warning ................................................
AC Power Circuit Breaker Specifications ...............................................174 AC Power Cord Specifications ...............................................................174 Site Electrical Wiring Guidelines ..............................
Return Procedure ........................................................................................203 Tools and Parts Required ............................................................................204 Packing the Router for Shipment .....
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) .....................................................................
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 ...................
List of Tables Table 1: Notice Icons ..................................................................................xviii Table 2: Text and Syntax Conventions ........................................................xviii Table 3: Technical Documentation for Supported Routing Platforms .
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 Co.
Documentation Conventions Table 1 on page xviii defines the notice icons used in this guide. Table 1: Notice Icons Description Meaning Icon Indicates important features or instructions. Informational note Indicates a situation that might result in loss of data or hardware damage.
Table 2: Text and Syntax Conventions (continued) Examples Description Convention ■ To configure a stub area, include the stub statement at the [edit protocols ospf area area-id] hierarchy level.
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.
Table 3: Technical Documentation for Supported Routing Platforms (continued) Description Book Provides an overview of policy concepts and describes how to configure routing policy, firewall filters, and forwarding options.
Table 3: Technical Documentation for Supported Routing Platforms (continued) Description Book J-Web User Guide Describes how to use the J-Web graphical user interface (GUI) to configure, monitor, and manage Juniper Networks routing platforms.
Table 3: Technical Documentation for Supported Routing Platforms (continued) Description Book 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.
Table 4: JUNOS Software Network Operations Guides Description Book 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.
Table 5: JUNOS Software with Enhanced Services Documentation (continued) Description Book 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.
Table 6: Additional Books Available Through http://www.juniper.net/books (continued) Description Book Provides an overview of Multiprotocol Label Switching (MPLS) applications (such as Layer 3 virtual.
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.
xxviii ■ Requesting Technical Support MX240 Ethernet Services Router Hardware Guide.
Part 1 MX240 Router Overview ■ Router Overview on page 3 ■ Hardware Components on page 5 MX240 Router Overview ■ 1.
2 ■ MX240 Router Overview MX240 Ethernet Services Router Hardware Guide.
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 .
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.
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 pag.
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 MX240 Ethernet Services Router Hardware Guide.
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 Chapter 2: Hardware Components.
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.
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.
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.
Table 8: 40-Port Gigabit Ethernet DPC LEDs (continued) Description State Color Label Link is active. No link. On steadily Green Off LINK Two LEDs, located on the craft interface above the DPC, display the status of the DPC and are labeled OK and FAIL .
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 slot 1/0 can contain either SCB1 or DPC0). If any slots are empty, you must install a blank panel.
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.
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 us.
■ 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.
Table 10: Routing Engine LEDs Description State Color Label Routing Engine is the Master. On steadily Blue MASTER Hard disk is functioning normally. Green blinking Green HDD Routing Engine is transitioning online. Routing Engine is functioning normally.
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.
■ 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.
Table 11: Alarm LEDs and Alarm Cutoff/Lamp Test Button Description State Color Shape Critical alarm LED — Indicates a critical condition that can cause the router to stop functioning. Possible causes include component removal, failure, or overheating.
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.
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.
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.
Table 17: AC Power Supply LEDs Description State Color Label AC power input voltage is below 78 VAC. Off Amber AC OK AC power input voltage is within 78 – 264 VAC. On Green DC power outputs generated by the power supply are not within the normal operating ranges.
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.
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.
Figure 19: Air Filter 26 ■ Cooling System MX240 Ethernet Services Router Hardware Guide.
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 .
28 ■ Setting Up the Router MX240 Ethernet Services Router Hardware Guide.
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 Check.
Table 19: Site Preparation Checklist (continued) Date Performed By For More Information Item or Task “ Calculating Power Budget for Fiber-Optic Cable ” on page 181 Calculate the optical power budget and optical power margin. Cabinet Requirements The router can be installed in a standard 482-mm wide (or larger) enclosed cabinet.
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.
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.
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.
34 ■ Clearance Requirements for Airflow and Hardware Maintenance MX240 Ethernet Services Router Hardware Guide.
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.
36 ■ MX240 Ethernet Services Router Hardware Guide.
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 .
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.
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.
Table 21: Accessory Box Parts List (continued) Quantity Part 1 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 2 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.
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.
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.
7. Tighten the two screws completely. 8. Repeat the procedure for the other bracket. 44 ■ Moving the Mounting Brackets for Center-Mounting the Router MX240 Ethernet Services Router Hardware Guide.
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 Mechanic.
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.
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.
48 ■ Installing the Router Using a Mechanical Lift MX240 Ethernet Services Router Hardware Guide.
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.
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-.
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.
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.
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 O.
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).
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.
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.
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.
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.
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: ■ Verify that the fuse is installed correctly and turn on the breaker at the battery distribution fuse board or fuse bay.
Wait until a message appears on the console confirming that the operating system has halted. For more information about the command, see the JUNOS System Basics and Services Command Reference . 2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis.
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.
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.
[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 do.
64 ■ Configuring the JUNOS Software MX240 Ethernet Services Router Hardware Guide.
Part 3 Hardware Maintenance, Troubleshooting, and Replacement Procedures ■ Maintaining Hardware Components on page 67 ■ Troubleshooting Hardware Components on page 79 ■ Replacing Hardware Compon.
66 ■ Hardware Maintenance, Troubleshooting, and Replacement Procedures MX240 Ethernet Services Router Hardware Guide.
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.
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.
Routing Engine 0 OK 42 degrees C / 107 degrees F Routing Engine 1 Present CB 0 Intake OK 40 degrees C / 104 degrees F CB 0 Exhaust A OK 37 degrees C / 98 degrees F CB 0 Exhaust B OK 42 degrees C / 107.
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.
■ To check the status of the SCBs, issue the show chassis environment cb command. The output is similar to the following: user@host> show chassis environment cb CB 0 status: State Online Master Temperature 40 degrees C / 104 degrees F Power 1 1.2 V 1208 mV 1.
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.
3 Empty 4 Empty 5 Online 42 6 0 1024 16 57 For more detailed output, add the detail option. The following example does not specify a slot number, which is optional: user@host> show chassis fpc deta.
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.
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.
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.
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.
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.
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 wit.
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.
■ 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.
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.
■ 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 .
Total RLDRAM 256 MB Total DDR DRAM 4096 MB Start time: 2007-12-06 11:33:01 PST Uptime: 4 hours, 34 minutes, 48 seconds Slot 2 information: State Online Temperature 33 degrees C / 91 degrees F Total CP.
Temperature OK DC output 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.
86 ■ Troubleshooting the Power System MX240 Ethernet Services Router Hardware Guide.
Chapter 13 Replacing Hardware Components This chapter explains how to replace hardware components on the router. It discusses the following topics: ■ Field-Replaceable Units (FRUs) on page 87 ■ To.
Table 23: Field-Replaceable Units Hot-Pluggable FRUs Hot-Removable and Hot-Insertable FRUs Master Switch Control Board (SCB) (if redundant) Master Routing Engine (if redundant) Switch Control Board (S.
Table 24: Tools and Parts Required (continued) Components Tool or part Air filter Routing Engine Craft interface SCB Cables and connectors Fan tray Phillips (+) screwdrivers, numbers 1 and 2 DPC Rubbe.
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 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.
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 mm 2 ).
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.
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.
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.
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.
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.
“ 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 ■ Ins.
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.
Installing an SCB To install an SCB (see Figure 44 on page 102): 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.
To check the status of the SCB, use the CLI command: user@host> show chassis environment cb CB 0 status: State Online Master Temperature 25 degrees C / 77 degrees F Power 1 1.2 V 1198 mV 1.5 V 1508 mV 1.8 V 1830 mV 2.5 V 5059 mV 3.3 V 6593 mV 5.0 V 5111 mV 12.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
■ 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.
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.
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.
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.
CAUTION: You must ensure that power connections maintain the proper polarity. The power source cables might be labeled (+) and ( – ) to indicate their polarity.
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: ■ Disconnecting an AC Power Cord on pa.
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.
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.
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.
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): 1.
Part 4 Appendixes ■ Safety and Regulatory Compliance Information on page 125 ■ Physical Specifications on page 161 ■ Router Environmental Specifications on page 163 ■ Power Guidelines, Require.
124 ■ Appendixes MX240 Ethernet Services Router Hardware Guide.
Appendix A Safety and Regulatory Compliance Information To install and use the router safely, follow proper safety procedures. This appendix discusses the following safety and regulatory compliance in.
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.
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.
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.
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.
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.
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.
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 th.
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.
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.
■ 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.
■ 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.
■ 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.
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.
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.
■ 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.
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.
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.
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 40 ο C.
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.
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.
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 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.
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.
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.
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.
¡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.
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.
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.
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.
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.
■ 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) .
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.
Declaration of Conformity Japan 158 ■ Agency Approvals and Compliance MX240 Ethernet Services Router Hardware Guide.
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.
160 ■ Agency Approvals and Compliance MX240 Ethernet Services Router Hardware Guide.
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 Value Description 8.71 in. (22.1 cm) high 17.
162 ■ Physical Specifications MX240 Ethernet Services Router Hardware Guide.
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.
164 ■ Router Environmental Specifications MX240 Ethernet Services Router Hardware Guide.
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 .
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.
DC Power System Electrical Specifications Table 28 on page 167 lists the DC power system electrical specifications. Table 28: DC Power System Electrical Specifications Specification Item Operating range: – 40.5 to – 72 VDC DC input voltage 31 A @ – 48 VDC per input (maximum) DC system current rating 29.
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 Current Requirement (Amps @ – 48 VDC) Power Requirement (Watts) DC Power Supply Configuration 1.
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.
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 .
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).
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.
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.
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.
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. Table 37: AC Power Cord Specifications Plug Type Elect.
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.
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.
178 ■ Site Electrical Wiring Guidelines MX240 Ethernet Services Router Hardware Guide.
Appendix E Cable and Wire Guidelines and Specifications To prepare for router or component installation, ensure that you have all required cables and wires.
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.
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.
Table 38: Estimated Values for Factors Causing Link Loss (continued) Estimated Link-Loss Value Link-Loss Factor 0.5 dB Splice Single-mode — 0.5 dB/km Multimode — 1 dB/km Fiber attenuation The foll.
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.
184 ■ Routing Engine Interface Cable and Wire Specifications MX240 Ethernet Services Router Hardware Guide.
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 Connec.
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.
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.
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.
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.
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.
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.
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.
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 ).
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.
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.
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 Comp.
PIC 2 BUILTIN BUILTIN 1x 10GE(LAN/WAN) Xcvr 0 REV 01 740-014279 KB602C3 XFP-10G-LR PIC 3 BUILTIN BUILTIN 1x 10GE(LAN/WAN) FPC 2 REV 01 750-018124 JY9642 DPCE 4x 10GE R CPU REV 06 710-013713 JY9337 DPC.
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).
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).
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).
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.
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.
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.
6. Remove the cables that connect to all external devices. For instructions, see “ Replacing Connections to Routing Engine Interface Ports ” on page 104.
206 ■ Packing Components for Shipment MX240 Ethernet Services Router Hardware Guide.
Part 5 Index ■ Index on page 209 Index ■ 207.
208 ■ Index MX240 Ethernet Services Router Hardware Guide.
Index Symbols #, comments in configuration statements ...................xix ( ), in syntax descriptions ............................................xix < >, in syntax descriptions .......................................xix [ ], in configuration statements .
grounding See DC power and grounding cables power See AC power cord cable management system description ............................................................ 17 fiber-optic cable, use with .....................................74 installation ..
replacing ............................................................. 106 status, checking ........................................ 72, 74, 83 DPCs components .......................................................... 10 troubleshooting ............
maintenance See maintenance guidelines DPC ............................................................... 74 packing router for shipment .....................................204 interface network See DPC interference electromagnetic .................
powering on the router .......................................... 55, 58 R rack clearance around, required ...................................32 mounting bracket hole spacing .............................32 securing to building .......................
specifications AC power cord ....................................................174 cable ................................................................... 179 power .......................................................... 170 Routing Engine management ports .
An important point after buying a device Juniper Networks MX240 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Juniper Networks MX240 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Juniper Networks MX240 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Juniper Networks MX240 you will learn all the available features of the product, as well as information on its operation. The information that you get Juniper Networks MX240 will certainly help you make a decision on the purchase.
If you already are a holder of Juniper Networks MX240, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Juniper Networks MX240.
However, one of the most important roles played by the user manual is to help in solving problems with Juniper Networks MX240. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Juniper Networks MX240 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
