HI, I’m seeing the below errors on a IRF stack of 5900AF switches

The switch is rack ports front power supply rear.

The DC advise that the power supplys suck are in (wrong direction) but the fans blow out the back.

 

[Master01]dis log | inc Oct
%Oct 20 03:40:37:565 2014 Master01 SHELL/6/SHELL_CMD: -Line=vty0-IPAddr=192.168.3.10-User=admin; Command is display ntp-service status
%Oct 20 03:40:55:142 2014 Master01 DEV/1/FAN_DIRECTION_NOT_PREFERRED: -Slot=2; Fan 1 airflow direction is not preferred on slot 2, please check it.
%Oct 20 03:40:55:144 2014 Master01 DEV/1/FAN_DIRECTION_NOT_PREFERRED: -Slot=2; Fan 2 airflow direction is not preferred on slot 2, please check it.
%Oct 20 03:40:58:357 2014 Master01 SHELL/6/SHELL_CMD: -Line=vty0-IPAddr=192.168.3.10-User=admin; Command is dis log
%Oct 20 03:41:16:853 2014 Master01 DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 1 airflow direction is not preferred on slot 1, please check it.
%Oct 20 03:41:16:853 2014 Master01 DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 2 airflow direction is not preferred on slot 1, please check it.

 

[Master01]dis device manuinfo
 Slot 1
DEVICE_NAME          : 5900AF-48XG-4QSFP+ JC772A
DEVICE_SERIAL_NUMBER : XXXXXXXXX
MAC_ADDRESS          : 4431-922B-88B3
MANUFACTURING_DATE   : 2013-11-20
VENDOR_NAME          : HP
Fan 1
DEVICE_NAME          : HP A58x0AF frt(ports)-bck(pwr) Fan Tray JC683A
DEVICE_SERIAL_NUMBER : CN47FDF1WG
MANUFACTURING_DATE   : 2014-07-19
VENDOR_NAME          : HP
Fan 2
DEVICE_NAME          : HP A58x0AF frt(ports)-bck(pwr) Fan Tray JC683A
DEVICE_SERIAL_NUMBER : CN47FDF1T6
MANUFACTURING_DATE   : 2014-07-19
VENDOR_NAME          : HP


[Master01]dis environment
 Slot 1
System temperature information (degree centigrade):
-------------------------------------------------------------------------------
Sensor    Temperature  LowerLimit  WarningLimit  AlarmLimit ShutdownLimit
hotspot 1      40           0            50          55           NA
hotspot 2      38           0            58          63           NA
 Slot 2
System temperature information (degree centigrade):
-------------------------------------------------------------------------------
Sensor    Temperature  LowerLimit  WarningLimit  AlarmLimit ShutdownLimit
hotspot 1      41           0            50          55           NA
hotspot 2      40           0            58          63           NA



[Master01]dis fan
 Slot 1
      FAN    1
      State    : FanDirectionFault
      Wind Direction    :Port-to-Power
      Prefer Wind Direction    :Power-to-Port
      FAN    2
      State    : FanDirectionFault
      Wind Direction    :Port-to-Power
      Prefer Wind Direction    :Power-to-Port
 Slot 2
      FAN    1
      State    : FanDirectionFault
      Wind Direction    :Port-to-Power
      Prefer Wind Direction    :Power-to-Port
      FAN    2
      State    : FanDirectionFault
      Wind Direction    :Port-to-Power
      Prefer Wind Direction    :Power-to-Port


The Fix :

Turned out to just be a preferred setting.

[Master01]fan prefer-direction slot 1 port-to-power
[Master01]fan prefer-direction slot 2 port-to-power

[Master01]dis log | inc recovered
%Oct 20 06:00:45:653 2014 Master01 DEV/5/FAN_RECOVERED: Fan 1 recovered.
%Oct 20 06:00:45:655 2014 Master01 DEV/5/FAN_RECOVERED: Fan 2 recovered.
%Oct 20 06:01:00:791 2014 Master01 DEV/5/FAN_RECOVERED: -Slot=2; Fan 1 recovered.
%Oct 20 06:01:00:793 2014 Master01 DEV/5/FAN_RECOVERED: -Slot=2; Fan 2 recovered.

 

[Master01]dis fan
 Slot 1
      FAN    1
      State    : Normal
      Wind Direction    :Port-to-Power
      Prefer Wind Direction    :Port-to-Power
      FAN    2
      State    : Normal
      Wind Direction    :Port-to-Power
      Prefer Wind Direction    :Port-to-Power
 Slot 2
      FAN    1
      State    : Normal
      Wind Direction    :Port-to-Power
      Prefer Wind Direction    :Port-to-Power
      FAN    2
      State    : Normal
      Wind Direction    :Port-to-Power
      Prefer Wind Direction    :Port-to-Power