Command Reference, Cisco Ios Xe Everest 16.5.1A (Catalyst 3650 Switches - Cisco Catalyst 3650 series Command Reference Manual

mode (power-stack configuration)
In redundant mode, the largest power supply is removed from the power pool to use as backup power in case
one of the other power supplies fails. The available power budget is the total power minus the largest power
supply. This reduces the available power in the pool for switches and powered devices, but in case of a failure
or an extreme power load, there is less chance of having to shut down switches or powered devices.
In strict mode, when a power supply fails and the available power drops below the budgeted power, the system
balances the budget through load shedding of powered devices, even if the actual power is less than the
available power. In nonstrict mode, the power stack can run in an over-allocated state and is stable as long as
the actual power does not exceed the available power. In this mode, a powered device drawing more than
normal power could cause the power stack to start shedding loads. This is normally not a problem because
most devices do not run at full power. The chances of multiple powered devices in the stack requiring maximum
power at the same time is small.
In both strict and nonstrict modes, power is denied when there is no power available in the power budget.
Examples This is an example of setting the power stack mode for the stack named power1 to power-shared with strict
power budgeting. All power in the stack is shared, but when the total available power is allotted, no more
devices are allowed power.
Device(config)# stack-power stack power1
Device(config-stackpower)# mode power-shared strict
Device(config-stackpower)# exit
This is an example of setting the power stack mode for the stack named power2 to redundant. The largest
power supply in the stack is removed from the power pool to provide redundancy in case one of the other
supplies fails.
Device(config)# stack-power stack power2
Device(config-stackpower)# mode redundant
Device(config-stackpower)# exit

Command Reference, Cisco IOS XE Everest 16.5.1a (Catalyst 3650 Switches)

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