• If you have installed a single supervisor module and configured the power budget mode for a single
supervisor, and you install a second supervisor:
• The system will reject the configuration, and allow the first supervisor to come up.
• If this action is accompanied by a low power condition where the system does not have sufficient
power, linecards maybe denied power.
For information about how to safely move from a single to a dual supervisor setup, see task Moving from
a Single to a Dual Supervisor Setup below.
The following tasks describe the available configuration options:
Configuring the Power Budget Mode for a Single Supervisor
Beginning in the privileged EXEC mode, perform these steps to configure the power budget mode for a single
supervisor setup:
Before you begin
Ensure that these prerequisites are met:
• You have installed only one supervisor module in the chassis.
• You have installed a blank in the second supervisor slot.
Procedure
PurposeCommand or Action
Enters the global configuration mode.configure terminal
Example:
Step 1
Device# configure terminal
Reserves power for one supervisor module in
the chassis.
power budget mode {single-sup}
Example:
Step 2
Device(config)# power budget mode
single-sup
Exits the global configuration mode.end
Example:
Step 3
Device(config)# end
Moving from a Single to a Dual Supervisor Setup
Beginning in the privileged EXEC mode, perform these steps to move from single to a dual supervisor setup:
Before you begin
Calculate the required power for a dual supervisor setup. Cisco Power Calculator (CPC) enables you to
calculate the power supply requirements for a specified configuration:
System Management Configuration Guide, Cisco IOS XE Bengaluru 17.4.x (Catalyst 9400 Switches)
236
Environmental Monitoring and Power Management
Configuring the Power Budget Mode for a Single Supervisor
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