Cisco Nexus 7710 Site Preparation And Hardware Installation Manual page 25

Preparing the Site
• 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, 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 height of the rack or cabinet must accommodate the 14-RU (24.5 inches or 62.2 cm) height of the
switch and its bottom support bracket.
• 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 brackets.
• Required clearances between the chassis and the edges of its rack or the interior of its cabinet are as
follows:
Additionally, you must consider the following site requirements for the rack:
• Power receptacles must be located within reach of the power cords used with the switch.
OL-30452-01.
Note Installation clearance requirements for solid-wall cabinets are not in the scope of
this guide. Such installations have to be custom-engineered by a cooling
professional. The customised configuration should satisfy the requirements
mentioned in the Preparing the Site
• 7.5 inches (19.1 cm) between the front of the chassis and the front of the rack or interior of the
cabinet (required for cabling).
• 3.0 inches (7.6 cm) between the rear of the chassis and the perforated rear door of the cabinet
(required for airflow in the cabinet if used).
Note This requirement does not apply to enclosures which have a solid rear door or
wall with other exhaust configurations.
• No clearance is required between the chassis and the sides of the rack or cabinet (no side airflow).
• AC power supplies
• Power cords for 3-kW AC power supplies are 8 to 12 feet (2.5 to 3.6 m) long.
• DC power supplies
• Power cords for 3.0-kW DC power supplies are supplied and dimensioned by the customer.
• HVAC/HVDC power supplies
• Power cords for 3.5-kW HVAC/HVDC power supplies are 14 feet (4.26 m) long.
Cisco Nexus 7710 Switch Site Preparation and Hardware Installation Guide
Rack and Cabinet Requirements
and the Switch Specifications sections.
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