Configuring The Redundant Mode - Cisco Catalyst 9400 System Management Configuration Manual

Environmental Monitoring and Power Management

Configuring the Redundant Mode

By default, the power supplies in the switch are set to operate in combined mode. To effectively use redundant
mode, note the following:
• If you have the power supply mode set to redundant mode and only one power supply installed, your
• Choose a power supply module that is powerful enough to support the switch configuration.
• Use the
• For optimal use of system power, choose power supply modules of the same capacity when configuring
To configure redundant mode, perform this task:
Procedure
Step 1
Step 2
switch accepts the configuration but operates without redundancy.
Cisco Power Calculator
Ensure that you install a sufficient number of power supply modules, so that the chassis and PoE
requirements are less than the maximum available power. Power supplies automatically adjust the power
resources at startup to accommodate the chassis and PoE requirements. Modules are brought up first,
followed by IP phones.
a redundant mode on the switch.
Command or Action
configure terminal
Example:
Device# configure terminal
power redundancy-mode redundant[n+1
standby-PSslot|n+1 standby-PSslot]
Example:
Device(config)# power redundancy-mode
redundant n+1 5
OR
Device(config)# power redundancy-mode
redundant n+n 5 6 7 8
System Management Configuration Guide, Cisco IOS XE Bengaluru 17.4.x (Catalyst 9400 Switches)
to help assess the number of power supplies required by the system.
Purpose
Enters the global configuration mode.
You can choose from these options:
• power redundancy-mode redundant n+1
• power redundancy-mode redundant n+n
Configuring the Redundant Mode
standby-PSslot—Configures the n+1
redundant mode. Enter the standby power
supply module slot number. The default
standby slot in this redundant mode is 8.
In the n+1 example here, the power supply
module in slot PS5 (and not the default
PS8) is the designated standby module and
has been configured accordingly.
Operational power supply modules
installed in all other slots, are active.
standby-PSslot—Configures the n+n
redundant mode. Enter the standby power
supply module slot numbers. The default
standby slots in this redundant mode are
5 through 8.
In the n+n example here, the power supply
modules in slots PS5, PS6, PS7, and PS8
are being used as standby modules, and
have been configured accordingly.
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