Mx480 Router Cabinet Size And Clearance Requirements; Mx480 Router Cabinet Airflow Requirements - Juniper MX480 Hardware Manual

SEE ALSO
Installation Safety Warnings for Juniper Networks Devices

MX480 Router Cabinet Size and Clearance Requirements

The minimum size cabinet that can accommodate the router is 482 mm wide and 800 mm deep. A cabinet
larger than the minimum requirement provides better airflow and reduces the chance of overheating. To
accommodate a single router, the cabinet must be at least 13 U high. If you provide adequate cooling air
and airflow clearance, you can stack five routers in a cabinet that has at least 48 U (84 in. or 2.13 m) of
usable vertical space.
The minimum front and rear clearance requirements depend on the mounting configuration you choose.
The minimum total clearance inside the cabinet is 30.7 in. between the inside of the front door and the
inside of the rear door.
SEE ALSO
Installation Safety Warnings for Juniper Networks Devices

MX480 Router Cabinet Airflow Requirements

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 47 on page 189.
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.
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