Dynamic power management

You can use the dynamic power management feature to better utilize the power available in the Power Entry Module (PEM). Whether a new hardware component is powered on depends on the availability of power in the PEM. A component is not powered on if the PEM cannot meet the worst-case power requirement for that component. The maximum power that each type of Modular Interface Card (MIC) consumes is maintained in a static database. The chassis daemon process (chassisd), which manages power budgeting for all line cards, uses this data when budgeting power for MICs. MICs are brought online only after the chassis daemon verifies that the worst-case power required for the MICs and the power required for all the online Field-Replaceable Units (FRUs) are available in the PEM. Dynamic power management is enabled by default.