Juniper MX240 Hardware Manual page 6

MX240 5G Universal Routing Platform Hardware Guide
Chapter 2
Chapter 3
vi
Site Planning, Preparation, and Specifications . . . . . . . . . . . . . . . . . . . . . . . 141
MX240 Site Preparation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
MX240 Site Guidelines and Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
MX240 Router Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
MX240 Router Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . 144
MX240 Router Rack Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
MX240 Router Clearance Requirements for Airflow and Hardware
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
MX240 Router Cabinet Size and Clearance Requirements . . . . . . . . . . . . . . 147
MX240 Router Cabinet Airflow Requirements . . . . . . . . . . . . . . . . . . . . . . . . 147
MX240 Power Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Power Requirements for an MX240 Router . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Calculating Power Requirements for MX240 Routers . . . . . . . . . . . . . . . . . . 156
MX240 Network Cable and Transceiver Planning . . . . . . . . . . . . . . . . . . . . . . . . . 159
Determining Transceiver Support and Specifications for M Series and T
Series Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Understanding Fiber-Optic Cable Signal Loss, Attenuation, and
Dispersion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Signal Loss in Multimode and Single-Mode Fiber-Optic Cable . . . . . . . 160
Attenuation and Dispersion in Fiber-Optic Cable . . . . . . . . . . . . . . . . . . 160
Calculating Power Budget and Power Margin for Fiber-Optic Cables . . . . . . 161
Calculating Power Budget for Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . 161
Calculating Power Margin for Fiber-Optic Cable . . . . . . . . . . . . . . . . . . . 161
Routing Engine Interface Cable and Wire Specifications for MX Series
Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
MX240 Management and Console Port Specifications and Pinouts . . . . . . . . . . 163
RJ-45 Connector Pinouts for an MX Series Routing Engine ETHERNET
Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
RJ-45 Connector Pinouts for MX Series Routing Engine AUX and CONSOLE
Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Initial Installation and Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Installing an MX240 Router Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Unpacking the MX240 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Tools and Parts Required to Unpack the MX240 Router . . . . . . . . . . . . . . . . 166
Unpacking the MX240 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Verifying the MX240 Router Parts Received . . . . . . . . . . . . . . . . . . . . . . . . . 168
Installing the MX240 Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Installing the MX240 Router Mounting Hardware for a Rack or Cabinet . . . 170
Moving the Mounting Brackets for Center-Mounting the MX240 Router . . . 172
Tools Required to Install the MX240 Router with a Mechanical Lift . . . . . . . 173
Removing Components from the MX240 Router Before Installing it with a
Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Removing the Power Supplies Before Installing the MX240 Router with
a Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Removing the Fan Tray Before Installing the MX240 Router with a
Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Removing the SCBs Before Installing the MX240 Router with a Lift . . . 175
Removing the DPCs Before Installing the MX240 Router with a Lift . . . 176
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