3.2.5. Air-Cooled Equipment Requirements
It is critical for proper equipment cooling that air recirculation from the air outlet side of the equipment to the inlet side of the equipment be minimized.
Ensure the following:
All equipment in a given cabinet must be configured to the same flow pattern.
Note
All CN5000 Switch fans will be configured for either port-to-fan (P-to-F) or fan-to-port (F-to-P) flow and are non-reversible. Air flow is indicated by a color tab – grey for P-to-F and black for F-to-P.
Cabinet side spaces must be closed off.
Any cable passthroughs must be configured to allow for the cable to pass through, but not air. This is also true for patch panels.
Top-of-rack and bottom-of-rack transitions must be closed out.
The mounting rails supplied with the CN5000 Switch are adequate for closing off the left and right side spaces on the cabinet. If full-depth servers are installed directly above and below the CN5000 Switch, this will generally suffice to close off the space, minimizing recirculation.