Rack And Cabinet Requirements - Cisco Nexus 9336PQ Hardware Installation Manual

Preparing the Site
• White coloring on HVAC/HVDC power supplies indicates dual direction airflow.
Note To prevent the switch from overheating and shutting down, you must position the air intake for the switch
in a cold aisle, and all of the fan and power supply modules must have the same direction of airflow (even
if their coloring is different).

Rack and Cabinet Requirements

You can install the following types of racks or cabinets for your switch:
• Standard perforated cabinets
• Solid-walled cabinets with a roof fan tray (bottom-to-top cooling)
• Standard open four-post Telco racks
To correctly install the switch in a cabinet that is located in a hot-aisle/cold-aisle environment, you should fit
the cabinet with baffles to prevent exhaust air from recirculating into the chassis air intake.
Work with your cabinet vendors to determine which of their cabinets meet the following requirements or see
the Cisco Technical Assistance Center (TAC) for recommendations:
• Use a standard 19-inch (48.3-cm), four-post Electronic Industries Alliance (EIA) cabinet or rack with
• The depth of a four-post rack must be 24 to 32 inches (61.0 to 81.3 cm) between the front and rear
• Required clearances between the chassis and the edges of its rack or the interior of its cabinet are as
Additionally, you must have power receptacles located within reach of the power cords used with the switch.
For the power cord specifications, see the
Warning Statement 1048—Rack Stabilization
Stability hazard. The rack stabilizing mechanism must be in place, or the rack must be bolted to the floor
before you slide the unit out for servicing. Failure to stabilize the rack can cause the rack to tip over.
mounting rails that conform to English universal hole spacing per section 1 of the ANSI/EIA-310-D-1992
standard.
mounting brackets.
follows:
◦ 4.5 inches (11.4 cm) between the front of the chassis and the interior of the cabinet (required for
cabling).
◦ 3.0 inches (7.6 cm) between the rear of the chassis and the interior of the cabinet (required for
airflow in the cabinet if used).
◦ No clearance is required between the chassis and the sides of the rack or cabinet (no side airflow).
Power Cord Specifications.
Cisco Nexus 9336PQ ACI-Mode Switch Hardware Installation Guide
Rack and Cabinet Requirements
9