Mx480 Router Cabinet Airflow Requirements; Figure 28: Airflow Through The Chassis - Juniper MX480 Hardware Manual

MX480 3D Universal Edge Router Hardware Guide

MX480 Router Cabinet Airflow Requirements

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50
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
on page 50.
Install the router as close as possible to the front of the cabinet so that the cable
management brackets just clear 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.

Figure 28: Airflow Through the Chassis

MX480 Site Preparation Checklist on page 45
Installation Safety Warnings for Juniper Networks Hardware Equipment on page 235
Figure 28
Copyright © 2011, Juniper Networks, Inc.