Fan Tray And Speed Variation; Power Consumption - Extreme Networks Extreme 7520 Series Hardware Installation Manual

Fan Tray and Speed Variation

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
Tray 1 Fan 1
Tray 1 Fan 2
Tray 2 Fan 1
Tray 2 Fan 2
Tray 3 Fan 1
Tray 3 Fan 2
Tray 4 Fan 1
Tray 4 Fan 2
Tray 5 Fan 1
Tray 5 Fan 2
Tray 6 Fan 1
Tray 6 Fan 2
* - The color of the tab on the fan tray indicates the airflow direction:
•
Red = Front-to-Back
•
Blue = Back-to-Front

Power Consumption

The following tables include power consumption information for the 8520 Series
switches.
88 Extreme 7520 Hardware Installation Guide
Operation Status
up
up
up
up
up
up
up
up
up
up
up
up
Technical Specifications
Operation Speed
high speed
medium speed
high speed
medium speed
high speed
medium speed
high speed
medium speed
high speed
medium speed
high speed
medium speed
Airflow Direction
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*
Unknown*