Juniper QFabric QFX3000-G Hardware Documentation page 294

QFX3000-G QFabric System Hardware Documentation
Table 89: Cabinet Requirements and Specifications for the Switch (continued)
Cabinet
Requirement Guidelines
Cabinet clearance The outer edges of the mounting brackets extend the width of the chassis to 19 in. (48.2 cm).
The minimum total clearance inside the cabinet is 30 in. (76.2 cm) between the inside of the front
door and the inside of the rear door.
Cabinet airflow When you mount the switch in a cabinet, ensure that ventilation through the cabinet is sufficient to
requirements prevent overheating.
Ensure adequate cool air supply to dissipate the thermal output of the switch or switches.
Ensure that the hot air exhaust of the chassis exits the cabinet without recirculating into the switch.
An open cabinet (without a top or doors) that employs hot air exhaust extraction from the top
ensures 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.
Install the switch in the cabinet in a way that maximizes the open space on the side of the chassis
that has the hot air exhaust.
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 is such that there is proper clearance around
the switch and cabinet.
A cabinet larger than the minimum required provides better airflow and reduces the chance of
overheating.
Related
Documentation
Cabinet Requirements for EX4200 Switches
244
Chassis Physical Specifications for EX4300 Switches on page 155
Clearance Requirements for Airflow and Hardware Maintenance for EX4300 Switches
on page 251
Mounting an EX4300 Switch
Rack-Mounting and Cabinet-Mounting Warnings on page 343
You can mount the switch in a cabinet that contains a 19-in. rack.
Cabinet requirements consist of:
Cabinet size
Clearance requirements
Cabinet airflow requirements
Table 89 on page 243 provides the cabinet requirements and specifications for the switch.
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