User's Manual

Carrier Grade Chassis Management Controller User’s Guide Addendum 45
racadm config -g cfgChassisPower -o
cfgChassisPowerCap 5400
sets the maximum power budget to 5400 watts.
NOTE: The power budget is limited to 16685 Watts. If you attempt to set an input
power budget value that exceeds the power capacity of your chassis, CMC displays
a failure message.
Server Power Reduction to Maintain Power Budget
CMC reduces power allocations of lower priority servers when additional
power is needed to maintain the system power consumption within the user-
configured System Input Power Cap. For example, when a new server is
engaged, CMC may decrease power to low priority servers to allow more
power for the new server. If the amount of power is still insufficient after
reducing power allocations of the lower priority servers, CMC lowers the
performance of servers until sufficient power is freed to power the new server.
CMC reduces server power allocation in two cases:
Overall power consumption exceeds the configurable System Input Power
Cap (see Setting Power Budget).
A power failure occurs in a non-redundant configuration.
For information about assigning priority levels to servers, see
Assigning
Priority Levels to Servers
.