Extreme Networks Extreme 7520 Series - Fan Tray and Speed Variation; Power Consumption

Fan Tray and Speed Variation
Fan speeds are adjusted based on calculations of the temperatures on all sensors. Due
to one fan being located behind the other, air pushed from one fan can cause the other
fan in the module to run at a higher speed. One fan can run at medium speed while
the other can spin at high speed if one is close to the temperature boundary.
Table 24: Fan Tray and Speed Variation
Description Operation Status Operation Speed Airow Direction
Tray 1 Fan 1 up high speed Unknown*
Tray 1 Fan 2 up medium speed Unknown*
Tray 2 Fan 1 up high speed Unknown*
Tray 2 Fan 2 up medium speed Unknown*
Tray 3 Fan 1 up high speed Unknown*
Tray 3 Fan 2 up medium speed Unknown*
Tray 4 Fan 1 up high speed Unknown*
Tray 4 Fan 2 up medium speed Unknown*
Tray 5 Fan 1 up high speed Unknown*
Tray 5 Fan 2 up medium speed Unknown*
Tray 6 Fan 1 up high speed Unknown*
Tray 6 Fan 2 up medium speed Unknown*
* - The color of the tab on the fan tray indicates the airow direction:
• Red = Front-to-Back
• Blue = Back-to-Front
Power Consumption
The following tables include power consumption information for the 8520 Series
switches.
Fan Tray and Speed Variation Technical Specications
88 Extreme 7520 Hardware Installation Guide