Procedure
PurposeCommand or Action
Enters the global configuration mode.configure terminal
Example:
Step 1
Device# configure terminal
Sets the power supply mode to combined mode.power redundancy-mode combined
Example:
Step 2
Device(config)# power redundancy-mode
combined
Exits global configuration mode.end
Example:
Step 3
Device(config)# end
Displays the power redundancy mode
information.
show power
Example:
Step 4
Device# show power
Power Budgeting for Supervisor Modules
The power budget, or required budgeted power, is the power the system requires and reserves for supervisor
modules, switching modules (line cards), and the fan tray to operate in the chassis. In the show power, and
show power detail command outputs, this is displayed as System Power. The system does not allow any part
of this required budgeted power to be automatically redirected for use by other components in the system.
This section describes how power budgeting works with respect to supervisor modules and the configuration
options that are available.
By default, the system reserves power for a redundant setup, to ensure high availability. This means that the
system reserves the power required by both the supervisor modules in the chassis, as part of the required
budgeted power (System Power).
You can also configure the system to reserve power for a single supervisor. This configuration option is suited
to situations where a single supervisor is installed and the total available power is not sufficent to enable all
line cards and PoE ports. In such a scenario, configuring the switch to reserve power for a single supervisor
enables you to free-up power and use it for other components, such as PoE ports, or line cards instead.
Note the following restrictions and guidelines:
• If you have installed both supervisor modules, you cannot configure the power budget mode for a single
supervisor. The system rejects the configuration and following message is displayed: cannot enable
single sup mode when remote supervisor is present.
• If you have installed both supervisor modules and the default setting is effective, you must install the
necessary number of power supply modules to meet overall system requirements (including line cards
and fan tray). Do not remove the second supervisor to remedy a situation where there is an insufficient
number of power supply modules.
System Management Configuration Guide, Cisco IOS XE Bengaluru 17.4.x (Catalyst 9400 Switches)
235
Environmental Monitoring and Power Management
Power Budgeting for Supervisor Modules
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