Mx2020 Cabinet Airflow Requirements - Juniper MX2020 Hardware Manual

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MX2020 Cabinet Airflow Requirements

Copyright © 2015, Juniper Networks, Inc.
Review the maximum distance allowed for each cable. Choose the length of cable
based on the distance between the hardware components being connected. See:
Calculating Power Budget and Power Margin for Fiber-Optic Cables on page 128
Understanding Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion on
page 127
Plan the cable routing and management. See:
10.
MX2020 Cable Manager Description on page 45
Maintaining Cables That Connect to MX2020 MPCs or MICs on page 338
MX2020 Router Overview on page 3
Before you install the router in a cabinet, you must ensure that ventilation through the
cabinet is sufficient to prevent overheating. Consider the following requirements to when
planning for chassis cooling:
Ensure that the cool air supply you provide through the cabinet can adequately dissipate
the thermal output of the router.
Ensure that the cabinet allows the chassis hot exhaust air to exit from the cabinet
without recirculating into the router. An open cabinet (without a top or doors) that
employs hot air exhaust extraction from the top allows the best airflow through the
chassis. If the cabinet contains a top or doors, perforations in these elements assist
with removing the hot air exhaust. For an illustration of chassis airflow, see
Figure 51 on page 106.
Install the router as close as possible to the front of the cabinet so that the cable
manager just clears the inside of the front door. This maximizes the clearance in the
rear of the cabinet for critical airflow.
Route and dress all cables to minimize the blockage of airflow to and from the chassis.
Chapter 10: Planning and Preparing the Site
105