Power Supply Modes - Cisco Catalyst 9404R Switch Hardware Installation Manual
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Also See for Catalyst 9404R Switch:
- Installation note (32 pages) ,
- Hardware installation manual (192 pages)
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Power Supply Modes
Module
Fan Tray, Supervisor Module,
Backplane
(Standby Output)
Power Supply Modes
Cisco Catalyst 9400 Series Switches offer redundant and combined configuration modes for power supplies.
The number of power supply modules installed and the system load determine the power-level that the system
expects to draw from each power supply module and consequently, the power supply mode that will be suitable.
For system power budgeting estimates and to determine power supply requirements for a specific Power over
Ethernet (PoE) configuration, use the
To configure a power supply mode, enter the power redundancy-mode command in global configuration
mode. If you do not configure a mode, the default mode applies.
Combined Mode
This is the default power supply mode.
The system operates on one to eight power supply modules. The power available to the system is the sum of
power outputs of all the power supply modules in the chassis. All available power supply modules are active
and sharing power, and can operate at up to 100 percent capacity.
Warning
In case of failure in the combined mode, each operational power supply increases its output. If the output
power does not meet system requirements and the power supply autolc shutdown command is disabled,
then all the operational power supply modules may be overloaded and go into overcurrent shutdown. All
system power is then lost.
Redundant Mode
In a redundant configuration, a given power supply module can either be active, or in standby mode and switch
to active when required.
• An active power supply module is powered on, and provides output power. All active modules in a
• A standby power supply module is powered on, but asleep. When in this mode, the power supply module's
To ensure high availability, the system is designed to respond to failures as follows:
• If all available power supply modules are active, operational power supplies continue to share current
• If standby power supply modules are available, the minimum number of power supply modules needed
You can configure an n+1 or an n+n redundant mode.
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
22
chassis always attempt to share the load.
OUTPUT LED is blinking green.
equally. Note that the load on the available power supplies will have increased.
to power the load, switch to active.
C9400-PWR-3200AC
3.3VDC
Cisco Power
Calculator.
Product Overview
C9400-PWR-2100AC
3.3VDC
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