Understanding Redundant Power Supplies
Purpose
Inspect redundant power supplies to ensure that they distribute power to the other router components according to their voltage requirements.
What Are Redundant Power Supplies
With redundant power supplies, two power supplies are installed in a router and perform load sharing during normal operation. When one power supply fails or is switched off, the other power supply immediately and automatically assumes the entire electrical load. Table 112 lists some router characteristics for each M-series router platform type.
The power supplies are internally connected to the midplane, which delivers the power input from the circuit breaker box and distributes the different output voltages produced by the power supplies to the router's components, depending on their voltage requirements.