• Ensure that the air conditioning meets the heat dissipation requirements listed in Site Preparation Checklist.
• Ensure that the fabric interconnect is adequately grounded. If the fabric interconnect is not mounted in
a grounded rack, Cisco recommends connecting both the system ground on the fabric interconnect and
the power supply ground to an earth ground.
• Ensure that the site power meets the power requirements listed in Power Specifications. If available, you
can use an uninterruptible power supply (UPS) to protect against power failures.
Avoid UPS types that use ferroresonant technology. These UPS types can become unstable with systems
such as the Cisco UCS Fabric Interconnect, which can have substantial current draw fluctuations because
of fluctuating data traffic patterns.
• Ensure that circuits are sized according to local and national codes. For North America, the power supply
requires a 15-A or 20-A circuit.
To prevent loss of input power, ensure that the total maximum loads on the circuits supplying power to
the fabric interconnect are within the current ratings for the wiring and breakers.
• Use the following screw torques (listed in Newton-metres) when installing the fabric interconnect:
• Captive screws: 4 in-lb (0.45 Nm)
• M3 screws: 4 in-lb (0.45 Nm)
• M4 screws: 12 in-lb (1.36 Nm)
• 10-32 screws: 20 in-lb (2.26 Nm)
• 12-24 screws: 30 in-lb (3.39 Nm)
Cabinet and Rack Requirements
This section provides the requirements for the following types of cabinets and racks, assuming an external
ambient air temperature range of 0 to 104°F (0 to 40°C):
• Standard perforated cabinets (60 percent or greater perforation front and back is required; the Cisco R
Series rack is an ideal choice)
• Standard open racks
If you are using an enclosed cabinet, we recommend one of the thermally validated types: standard perforated
or solid-walled with a fan tray.
Note
Do not use racks that have obstructions (such as power strips), because the obstructions could impair access
to field-replaceable units (FRUs). The Cisco RP series PDUs, when mounted in a Cisco R Series Rack, does
not obstruct FRU replacement.
Note
Cisco UCS 6400 Series Fabric Interconnect Hardware Installation Guide
15
Installing the Cisco UCS Fabric Interconnect
Cabinet and Rack Requirements
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