Cisco Catalyst 9400 User Manual

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
switch accepts the configuration but operates without redundancy.
• Choose a power supply module that is powerful enough to support the switch configuration.
• Use the Cisco Power Calculator to help assess the number of power supplies required by the system.
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.
• For optimal use of system power, choose power supply modules of the same capacity when configuring
a redundant mode on the switch.
To configure redundant mode, perform this task:
Procedure
PurposeCommand or Action
Enters the global configuration mode.configure terminal
Example:
Step 1
Device# configure terminal
You can choose from these options:power redundancy-mode redundant[n+1
standby-PSslot|n+1 standby-PSslot]
Step 2
• power redundancy-moderedundant n+1
standby-PSslot—Configures the n+1
Example:
redundant mode. Enter the standby power
Device(config)# power redundancy-mode
redundant n+1 5
supply module slot number. The default
standby slot in this redundant mode is 8.
OR
Device(config)# power redundancy-mode
redundant n+n 5 6 7 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.
• power redundancy-moderedundant n+n
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.
System Management Configuration Guide, Cisco IOS XE Bengaluru 17.4.x (Catalyst 9400 Switches)
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Environmental Monitoring and Power Management
Configuring the Redundant Mode

Cisco Catalyst 9400 Specifications

General

Product Series	Catalyst 9400 Series
Layer	Layer 2/3
Operating System	Cisco IOS XE
Switch Type	Modular
Uplink Interfaces	10 Gigabit Ethernet, 40 Gigabit Ethernet, 100 Gigabit Ethernet
Stacking	No
Form Factor	Modular Chassis
Operating Temperature	0°C to 40°C (32°F to 104°F)
Redundancy	Power supplies
Security Features	MACsec
Management	Cisco DNA Center, CLI, SNMP