Cisco Nexus 93128TXNX, Руководство по установке оборудования

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• Gray coloring on DC power supplies indicates port-side exhaust airflow.
• Green coloring on DC power supplies indicates port-side intake airflow.
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). If you must change the airflow direction for the switch, you must shutdown
the switch before changing the modules.
Note
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
• Standard open two-post Telco racks
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
mounting rails that conform to English universal hole spacing per section 1 of the ANSI/EIA-310-D-1992
standard.
• The depth of a four-post rack must be 24 to 32 inches (61.0 to 81.3 cm) between the front and rear
mounting rails (for proper mounting of the bottom-support brackets or other mounting hardware).
• Required clearances between the chassis and the edges of its rack or the interior of its cabinet are as
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).
Additionally, you must have power receptacles located within reach of the power cords used with the switch.
For the power cord specifications, see the
Power Cord Specifications .
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.
Warning
Cisco Nexus 9396PX NX-OS Mode Switch Hardware Installation Guide
11
Preparing the Site
Rack and Cabinet Requirements