Name: Juniper M120
Brand: Juniper
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M120 Multiservice Edge Router Hardware Guide

Modified: 2018-07-08

Default Chapter3
- Table of Contents3
- About the Documentation21
Chapter 1 System Overview29
- M120 Router Description29
- M120 Component Redundancy30
Chapter 2 M120 Router Release Notes31
- Outstanding Issues with the M120 Router31
- Errata with the M120 Router Documentation31
Chapter 3 Chassis Components and Descriptions33
- M120 Router Chassis Description33
- Figure 1: Front View of a Fully Configured M120 Router Chassis34
- Figure 2: Rear View of a Fully Configured AC-Powered M120 Router Chassis34
- M120 Midplane Description35
- Figure 3: Rear View of a Fully Configured DC-Powered M120 Router Chassis35
- M120 Cable Management System Description36
- Figure 4: M120 Midplane36
- M120 Craft Interface Description37
- M120 Alarm Leds and Alarm Cutoff/Lamp Test Button39
- Table 3: M120 Alarm Leds and Alarm Cutoff/Lamp Test Button39
- M120 Component Leds on the Craft Interface40
- M120 External Clock Interface Ports on the Craft Interface42
- Table 8: External Clock Leds on the M120 Craft Interface42
- M120 Alarm Relay Contacts on the Craft Interface43
Chapter 4 Cooling System Components and Descriptions45
- M120 Cooling System Description45
- Figure 7: Airflow through the M120 Chassis46
- Figure 8: M120 Front Fan Tray46
- Figure 9: M120 Rear Fan Tray46
Chapter 5 Host Subsystem Components and Descriptions47
- M120 Host Subsystem Description47
- M120 Routing Engine Description48
- M120 Routing Engine Leds51
- M120 RE-A-1800X2 Routing Engine Description51
- RE-A-1800 Routing Engine Leds53
- Figure 14: USB Memory Device in an Routing Engine53
- M120 Routing Engine Interface Ports and Status Indicators54
- Table 10: Routing Engine Leds54
- Routing Engine Specifications55
- Table 11: Routing Engine Specifications55
- Table 12: End-Of-Life Routing Engine Specifications58
- Supported Routing Engines by Router59
- M120 Control Board (CB) Description73
- M120 Control Board (CB) Leds74
- Figure 15: M120 CB74
- Table 38: M120 Control Board Leds75
Chapter 6 Line Card Components and Descriptions77
- M120 Flexible PIC Concentrators (Fpcs) Description77
- M120 Flexible PIC Concentrators (Fpcs) LED80
- M120 Compact Fpcs (Cfpcs) Description80
- M120 Fpcs and Cfpcs Supported82
- Table 39: Fpcs Supported by the M120 Router82
- M120 Pics Description83
- Table 40: Cfpcs Supported by the M120 Router83
- M120 PIC Leds84
- M120 Pics Supported84
- Table 41: Pics Supported in the M120 Router84
- M120 End-Of-Life Pics Supported89
- Table 42: End-Of-Life Pics Supported in the M120 Router89
- M120 PIC/FPC Compatibility92
- Table 43: M120 PIC/FPC Compatibility92
Chapter 7 Power System Components and Descriptions97
- M120 Power Supplies Description97
- M120 DC Power Supply Description98
- M120 AC Power Supply Description98
- Figure 20: M120 DC Power Supply98
- M120 Power Supply Leds99
- Figure 21: M120 AC Power Supply99
- Power System Components and Descriptions99
- Table 44: M120 Power Supply LED100
Chapter 8 Switch Fabric Components and Descriptions101
- M120 Forwarding Engine Boards (Febs) Description101
  - FEB Components102
  - Figure 22: M120 FEB102
- M120 Forwarding Engine Boards (Febs) Leds103
Chapter 9 Preparation Overview105
- Site Planning, Preparation, and Specifications105
- Preparation Overview107
Chapter 10 AC Power Requirements and Specifications119
- M120 AC Power, Connection, and Power Cord Specifications119
- Table 54: AC Power Cord Specifications120
- Electrical Specifications for the M120 AC Power Supply121
- Figure 26: M120 AC Plug Types121
- Table 55: AC Power Supply Electrical Specifications122
Chapter 11 DC Power Requirements and Specifications123
- M120 DC Power, Connection, and Cable Specifications123
- Figure 27: Typical DC Source Cabling to the M120 Router124
- DC Power Requirements and Specifications125
- Table 56: M120 DC Power and Grounding Cable Specifications125
- Electrical Specifications for the M120 DC Power Supply126
- Table 57: DC Power Supply Electrical Specifications126
Chapter 12 Network Cable and Transceiver Planning127
- Understanding Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion127
  - Signal Loss in Multimode and Single-Mode Fiber-Optic Cable127
  - Attenuation and Dispersion in Fiber-Optic Cable127
- Calculating Power Budget and Power Margin for Fiber-Optic Cables128
Chapter 13 Management Cable and Transceiver Specifications and Pinouts131
- Routing Engine Interface Cable and Wire Specifications for the M120 Router131
- Table 59: Routing Engine Interface Cable and Wire Specifications131
- RJ-45 Connector Pinouts for the M120 Routing Engine ETHERNET Port132
- RJ-45 Connector Pinouts for the Routing Engine AUX and CONSOLE Ports132
- Table 60: RJ-45 Connector Pinout for the Routing Engine ETHERNET Port132
- Table 61: RJ-45 Connector Pinout for the Routing Engine AUX and CONSOLE132
- RJ-45 Connector Pinouts for the External Clock Ports133
Chapter 14 Installation Overview137
- M120 Router Installation Summary137
Chapter 15 Unpacking the M120139
- Tools and Parts Required to Unpack the M120 Router139
- Unpacking the M120 Router139
- Verifying M120 Parts Received141
- Figure 28: Contents of the M120 Shipping Container141
- Table 63: Parts List for a Fully Configured M120 Router141
- Table 64: Accessory Box Parts List142
Chapter 16 Installing the Mounting Hardware145
- Cabinet145
- Table 65: Four-Post Rack or Cabinet Mounting Hole Locations for the M120145
- Installing the Mounting Hardware for a Front-Mount Open-Frame Rack147
- Figure 29: Installing the M120 Mounting Hardware for a Four-Post Rack or147
- Table 66: Open-Frame Rack Mounting Hole Locations for the M120 Router147
- Installing the Mounting Hardware for a Center-Mount Open-Frame Rack149
- Figure 30: Installing the M120 Mounting Hardware for an Open-Frame Rack149
Chapter 17 Installing the M120 with a Mechanical Lift151
- Tools Required to Install the M120 Router Using a Mechanical Lift151
- Installing the M120 Router Using a Mechanical Lift151
- Figure 31: Installing the M120 Router in the Rack153
Chapter 18 Installing the M120 Without a Mechanical Lift155
- Lift155
- Removing Components from the Chassis before Installing the M120 Router Without a Mechanical Lift155
- Installing the M120 Router Without Using a Mechanical Lift165
Chapter 19 Connecting the M120 to Ground177
- Connecting the Grounding Cable to the M120 Router177
- Figure 47: Connecting the Grounding Cable to the M120 Router178
Chapter 20 Connecting the M120 to External Devices179
- Tools and Parts Required to Connect the M120 Router179
- Connecting the M120 Router to Management and Alarm Devices179
  - Device179
- Connecting the M120 Router to a Network for Out-Of-Band Management186
- Figure 54: M120 Routing Engine Ethernet Cable Connector186
- Connecting the M120 Router to an External Alarm-Reporting Device187
- Figure 55: M120 Routing Engine External Device Ports187
- Connecting the M120 Router to an External Clocking Device189
- Figure 56: M120 Routing Engine Alarm Relay Contacts189
- Connecting PIC Cables to the M120 Router190
- Figure 57: Attaching a Cable to an M120 PIC192
Chapter 21 Providing Power to the M120193
- Connecting Power to an AC-Powered M120 Router193
- Figure 58: Connecting AC Power to the M120 Router194
- Connecting Power to a DC-Powered M120 Router195
- Powering on the M120 Router196
- Figure 59: Connecting DC Power to the M120 Router196
- Powering off the M120 Router197
Chapter 22 Configuring the Junos Software199
- Initially Configuring Junos os on the M120 Router199
Chapter 23 Installing and Replacing Components203
- Overview of Installing and Replacing Components205
Chapter 24 Replacing Chassis Components209
- Replacing Alarm Relay Wires on the M120 Craft Interface209
- Replacing the M120 Craft Interface210
Chapter 25 Replacing Cooling System Components213
- Replacing an M120 Air Filter213
- Replacing an M120 Fan Tray216
Chapter 26 Replacing Host Subsystem Components221
- Replacing an M120 Routing Engine221
- Replacing an SSD Drive on an RE-A-1800 or RE-S-1800224
- Figure 70: Installing an M120 Routing Engine224
- Figure 71: RE-A-1800 Storage Drive Slots225
- Figure 72: RE-S-1800 Storage Drive Slots225
- Replacing a DIMM Module in M120 Routing Engines226
  - Removing a M120 DIMM Module226
  - Installing a M120 DIMM Module227
- Replacing an M120 CB228
- Replacing Connections to M120 Routing Engine Interface Ports232
- Replacing the Console or Auxiliary Cable on the M120 Routing Engine235
- Figure 78: M120 Routing Engine Interface Ports and Alarm Relay Contacts235
- Figure 80: M120 Routing Engine Interface Ports and Alarm Relay Contacts235
- Replacing the Management Ethernet Cable on the M120 Routing Engine236
- Figure 81: M120 Routing Engine Interface Ports and Alarm Relay Contacts236
- Figure 82: M120 Ethernet Cable Connectors237
- Figure 83: M120 Routing Engine Interface Ports and Alarm Relay Contacts237
Chapter 27 Replacing Line Card Components239
- Replacing an M120 FPC239
- Replacing an M120 CFPC245
- Replacing an M120 PIC249
- Replacing an M120 PIC Cable254
- Replacing an M120 XENPAK Module257
- Replacing an SFP or XFP Transceiver260
Chapter 28 Replacing Power System Components265
- Replacing an M120 AC Power Supply265
- Replacing an M120 AC Power Supply Cord270
- Replacing an M120 DC Power Supply271
- Replacing an M120 DC Power Supply Cable277
- Figure 101: Connecting Power Cables to the M120 DC Power Supply277
Chapter 29 Replacing Switch Fabric Components281
- Replacing an M120 FEB281
Chapter 30 Routine Maintenance Procedures287
- Routine Maintenance Procedures on the M120 Router287
Chapter 31 Maintaining Components and Cables289
- Tools and Parts Required to Maintain M120 Hardware Components289
- Maintaining the M120 Air Filter289
- Maintaining the M120 Fan Trays290
- Maintaining the M120 Host Subsystem292
- Taking the M120 Host Subsystem Offline293
- Table 69: Effect of Taking the M120 Host Subsystem Offline294
- Maintaining M120 Fpcs and Cfpcs296
- Storing an M120 FPC297
- Holding an M120 FPC297
- Figure 104: Holding an M120 FPC Vertically298
- Figure 105: Holding an M120 FPC Horizontally299
- Figure 106: Do Not Grasp the Connector Edge299
- Figure 107: Do Not Carry an FPC with Only One Hand300
- Maintaining M120 Pics and PIC Cables301
- Figure 108: Do Not Rest the FPC on an Edge301
- Maintaining the M120 Power Supplies303
- Maintaining the M120 Febs304
  - Troubleshooting Hardware307
Chapter 32 Troubleshooting Components309
- Overview of Troubleshooting Resources for the M120 Router309
- M120 LED Overview310
  - Craft Interface Leds310
  - Component Leds311
- Troubleshooting the M120 Cooling System312
- Troubleshooting M120 Fpcs and Cfpcs313
- Troubleshooting M120 Pics314
- Troubleshooting the M120 Power System314
- Troubleshooting M120 Febs315
  - Or Removal317
  - Contacting Customer Support and Returning the Chassis or Components319
Chapter 33 Contacting Customer Support321
Chapter 34 Locating Component Serial Numbers323
- Displaying M120 Router Components and Serial Numbers323
- M120 Chassis Serial Number Label324
- Figure 109: Serial Number ID Label324
- M120 Craft Interface Serial Number Label325
- M120 Routing Engine Serial Number Label325
- Figure 110: M120 Chassis Serial Number Label325
- Figure 111: M120 Craft Interface Serial Number Label325
- M120 CB Serial Number Label326
- Figure 112: M120 Routing Engine Serial Number Label326
- Figure 113: M120 CB Serial Number Label326
- M120 FPC Serial Number Label327
- M120 CFPC Serial Number Label327
- Figure 114: M120 FPC Serial Number Label327
- Figure 115: M120 Routing Engine Serial Number Label327
- M120 PIC Serial Number Label328
- M120 Power Supply Serial Number Labels328
- Figure 116: M120 PIC Serial Number Label328
- M120 FEB Serial Number Label329
- Figure 117: M120 AC Power Supply Serial Number Label329
- Figure 118: M120 DC Power Supply Serial Number Label329
- Figure 119: M120 FEB Serial Number Label330
Chapter 35 Packing and Returning Components331
- Returning a Hardware Component to Juniper Networks, Inc331
- Tools and Parts Required to Remove Components from an M120 Router332
- Packing the M120 Router for Shipment332
- Guidelines for Packing M120 Components for Shipment334
  - Safety and Compliance Information335
Chapter 36 General Safety Guidelines and Warnings337
- Definition of Safety Warning Levels337
- General Safety Guidelines for Juniper Networks Devices339
- General Safety Warnings for Juniper Networks Devices340
  - Qualified Personnel Warning340
  - Restricted-Access Area Warning340
- Preventing Electrostatic Discharge Damage to an M120 Router342
- Figure 120: Placing a Component into an Electrostatic Bag342
Chapter 37 Fire Safety Requirements345
- Fire Safety Requirements for Juniper Networks Devices345
Chapter 38 Installation Safety Guidelines and Warnings347
- M120 Chassis Lifting Guidelines347
- Installation Safety Warnings for Juniper Networks Devices348
Chapter 39 Laser and LED Safety Guidelines and Warnings355
- General Laser Safety Guidelines for the M120 Router355
- M120 Laser and LED Safety Warnings355
Chapter 40 Maintenance and Operational Safety Guidelines and Warnings359
- Maintenance and Operational Safety Warnings for Juniper Networks Devices359
Chapter 41 Electrical Safety Guidelines and Warnings365
- In Case of an Electrical Accident365
- General Electrical Safety Warnings for Juniper Networks Devices365
- AC Power Electrical Safety Guidelines for the M120 Router369
- Japanese AC Power Cord Warning for M Series and MX Series Routers370
- DC Power Electrical Safety Warnings for Juniper Networks Devices370
- DC Power Electrical Safety Guidelines for the M120 Router373
- Site Electrical Wiring Guidelines for Juniper Networks Devices375
Chapter 42 Agency Approvals and Compliance Statements377
- Agency Approvals for M120 Routers377
- Compliance Statements for EMC Requirements for Juniper Networks Devices377
- Compliance Statements for EMC Requirements for the M120 Router379
  - Community)379
- Compliance Statements for EMC Requirements for Juniper Networks Devices (United States)380
- Compliance Statements for Environmental Requirements380
- Compliance Statements for NEBS for the M120 Router380
- Compliance Statements for Acoustic Noise for the M120 Router381

Brand	Juniper
Model	M120
Category	Network Router
Language	English

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