Juniper QFX5220, Hardware Manual

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Cabinet requirements consist of:
•
Cabinet size and clearance
•
Cabinet airflow requirements
Table 30 on page 90 provides the cabinet requirements and specifications for the QFX5220.
Table 30: Cabinet Requirements for the QFX5220
Guidelines Cabinet Requirement
The minimum cabinet size for accommodating a QFX5220 device is 36 in.
(91.4 cm) deep. Large cabinets improve airflow and reduce the chance of
overheating.
Cabinet size and clearance
When you mount the switch in a cabinet, ensure that ventilation through the
cabinet is sufficient to prevent overheating.
•
Ensure that the cool air supply you provide through the cabinet adequately
dissipates the thermal output of the switch (or switches).
•
Ensure that the cabinet allows the chassis hot exhaust air to exit the cabinet
without recirculating into the switch. 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.
•
The QFX5220 fans exhaust hot air either through the vents on the port
panel or through the fans and power supplies. Install the switch in the
cabinet in a way that maximizes the open space on the FRU side of the
chassis. This maximizes the clearance for critical airflow.
•
Route and dress all cables to minimize the blockage of airflow to and from
the chassis.
•
Ensure that the spacing of rails and adjacent cabinets allows for the proper
clearance around the switch and cabinet.
Cabinet airflow requirements
RELATED DOCUMENTATION
QFX5220 Installation Overview | 111
Unpacking and Mounting the QFX5220 | 112
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