Replace Power Supply Components - Cisco 8800 Series Hardware Installation Manual

Replace Chassis Components

Replace Power Supply Components

The Cisco 8818, 8812 and 8808 Routers support OIR of power modules. If you are replacing a redundant
power module, you can replace the power module while the system remains powered on without any electrical
hazard or damage to the system. This feature enables you to replace a power module while the system maintains
all routing information and ensures session preservation.
However, to maintain operational redundancy and proper cooling, and to meet EMI compliance standards,
you must have at least one working redundant power module that is installed. When you remove a failed
power module with the router in operation, perform the replacement as quickly as possible. Make sure you
have the replacement power module ready before beginning the removal and installation procedure.
Note
For the RP to communicate properly to a power module in a power tray, input power to at least one of the
power modules in the power tray should be present.
This section contains procedures on how to replace the power modules.
Caution Do not turn off the switch on the power tray to remove individual power modules. Power modules support
OIR, so they can be removed and replaced with the power on and the system operating.
Note Ensure to replace the power supply bezel and secure it with the provided jackscrews.
Hardware Installation Guide for Cisco 8800 Series Routers
Replace Power Supply Components
99