Cisco Nexus 7000 Power Functionality

[Zarga]

Hello Everybody , 

i noticed a strange behavior of the Nexus 7000 10 slot  

I have a  Power failure for 400ms   the Switch noticed that there is a problem with all 3 power supply but  he  don´t reboot 

bellow  are the logging : 

PLATFORM-2-PS_CAPACITY_CHANGE: Power supply PS1 changed its capacity. possibly due to On/Off or power cable removal/insertion (Serial number DTM1729064Z)

 %PLATFORM-2-PS_CAPACITY_CHANGE: Power supply PS2 changed its capacity. possibly due to On/Off or power cable removal/insertion (Serial number DTM17290654)

 %PLATFORM-2-PS_CAPACITY_CHANGE: Power supply PS3 changed its capacity. possibly due to On/Off or power cable removal/insertion (Serial number DTM17290645)

PLATFORM-2-PS_PWR_INPUT_MISSING: Power supply 1 present but all AC/DC inputs are not connected, power redundancy might be affected

PLATFORM-2-PS_PWR_INPUT_MISSING: Power supply 2 present but all AC/DC inputs are not connected, power redundancy might be affected

PLATFORM-2-PS_PWR_INPUT_MISSING: Power supply 3 present but all AC/DC inputs are not connected, power redundancy might be affected

PLATFORM-2-PS_CAPACITY_CHANGE: Power supply PS1 changed its capacity. possibly due to On/Off or power cable removal/insertion (Serial number DTM1729064Z)

PLATFORM-2-PS_CAPACITY_CHANGE: Power supply PS2 changed its capacity. possibly due to On/Off or power cable removal/insertion (Serial number DTM17290654)

PLATFORM-2-PS_CAPACITY_CHANGE: Power supply PS3 changed its capacity. possibly due to On/Off or power cable removal/insertion (Serial number DTM17290645)

PLATFORM-2-PS_RED_MODE_RESTORED: Power redundancy operational mode changed to configured mode

could you please explain to me what is this bahavior ? how the power supply on the nexux 7000 work 

thank you for your response 

Beste regards 

[Ganesh Hariharan]

Hello,

With N7k N+1 Power Supply Unit Redundancy  is default  mode of operations, which protect against a single power supply unit failure. In the event of a single power supply failure, loads are redistributed using available capacity across remaining functional power supply units.

N+1 redundancy is available with either 2 or 3 power supplies installed in the system. The total available power to the chassis is the sum of all installed power supplies minus that of the largest (for redundancy). This is the default power redundancy mode.

Hope it Helps..

-GI

Rate if it Helps..