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Removing and Replacing Components
Replacing Internal Power Supplies
Replacing Fan Modules
Removing the Switch from the Rack
You can replace internal power supplies and fan modules, as needed, while the switch
is operating ("hot swapping"). However, if you are changing the airflow direction of the
internal power supplies and fan modules, you must power down the switch.
For each switch, ensure that all installed power supplies and fan modules have the
same the airflow direction: either front-to-back or back-to-front.
Follow the procedures in this section to remove and replace power supplies and fan
modules, and to remove a switch from a rack.
Replacing Internal Power Supplies
You can replace internal power supplies as needed while the switch is operating ("hot
swapping"). However, if you are changing the airflow direction of the internal power
supplies and fan modules, you must power down the switch.
All installed power supplies must have the same airflow direction (front-to-back or
back-to-front) and must also match the airflow direction of the fan modules.
To replace one or both AC internal power supplies in an 8720 switch, follow the steps in
Installing a 750 W Internal AC Power Supply
To replace one or both DC internal power supplies in an 8720 switch, follow the steps in
Installing a 750 W Internal DC Power Supply
Replacing Fan Modules
You can replace fan modules as needed while the switch is operating ("hot swapping").
However, if you are changing the airflow direction of the internal power supplies and
fan modules, you must power down the switch.
All installed fan modules must blow air in the same direction and must match the
airflow direction of the installed power supplies.
•
If the switch's fan tray has a red tab, the airflow is front-to-back. The fan module may
be labeled Air Out.
on page 65
on page 65
on page 66
on page 50.
on page 54.
Extreme 8720 Switch Hardware Installation Guide
65
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