The S4810 system fans are supported with two air-flow options. Be sure to order the fans that are suitable to support proper ventilation for your site. Use a single type of fan in your system. Do not mix Reverse and Normal air-flows in a single chassis. The system will shut down in one minute if the airflow directions are mismatched.
- Normal is airflow from I/O panel to power supply
- Reversed is airflow from power supply to I/O panel
So if you want to use S4810 as a top of rack switch for servers in the server rack you probably want to have ports (I/O panel) on the rear of the rack to simplify cable management. The reversed air-flow option is the way to go for this use case.