Power Supply Load Sharing, Redundancy, and Replacement

When two power supplies are installed, they are redundant, sharing the electrical load equally if both supplies are operational. If one power supply stops functioning for any reason, the remaining power supply instantly begins providing all the power the router needs for normal functioning, and can provide full power indefinitely.

Power supplies are hot-removable and hot-insertable, as described in Field-Replaceable Units (FRUs). For replacement instructions, see Replace an AC Power Supply and Replace a DC Power Supply.