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New Member

Fan warning on N5K after upgrading NX-OS from 5.0 to 5.1 or 5.2

Has anyone seen the following fan warnings after upgrading the OS on 5548UP? I tested on 2 systems with the same result. Reverting back to NX-OS 5.0 stops the warning. The upgrade was done using the command:

install all kickstart bootflash:n5000-uk9-kickstart.5.1.3.N1.1a.bin system bootflash:n5000-uk9.5.1.3.N1.1a.bin

Same problem for n5000-uk9.5.2.1.N1.bin and n5000-uk9.5.1.3.N1.1a.bin images. No problem running n5000-uk9.5.0.3.N2.1.bin

2012 Jul 20 13:51:47 n5k-1 %$ VDC-1 %$ %NOHMS-2-NOHMS_ENV_ERR_FAN_SPEED:  System minor alarm in fan tray 2: fan speed is out of range on fan 3.  12158 to 16211 rpm expected. 11894 rpm read

2012 Jul 20 13:51:47 n5k-1 %$ VDC-1 %$ %NOHMS-2-NOHMS_ENV_ERR_FANS_DOWN:  System major alarm on fans: Multiple fans missing or failed

2012 Jul 20 13:51:47 n5k-1 %$ VDC-1 %$ %PFMA-0-SYS_SHUTDOWN_FAN_REMOVAL:  System shutdown in 60 seconds due to fan removal

2012 Jul 20 13:51:52 n5k-1 %$ VDC-1 %$ %PFMA-0-SYS_SHUTDOWN_FAN_REMOVAL:  System shutdown in 55 seconds due to fan removal

2012 Jul 20 13:51:57 n5k-1 %$ VDC-1 %$ %PFMA-0-SYS_SHUTDOWN_FAN_REMOVAL:  System shutdown in 50 seconds due to fan removal

2012 Jul 20 13:52:02 n5k-1 %$ VDC-1 %$ %PFMA-0-SYS_SHUTDOWN_FAN_REMOVAL:  System shutdown in 45 seconds due to fan removal

2012 Jul 20 13:52:03 n5k-1 %$ VDC-1 %$  %NOHMS-2-NOHMS_ENV_ERR_FAN_RECOVERED: Recovered: System minor alarm in  fan tray 1

2012 Jul 20 13:52:03 n5k-1 %$ VDC-1 %$ %NOHMS-2-NOHMS_ENV_ERR_FANS_UP:  Recovered: System major alarm on fans: Multiple fans missing or failed

2012 Jul 20 13:52:17 n5k-1 %$ VDC-1 %$  %NOHMS-2-NOHMS_ENV_ERR_FAN_RECOVERED: Recovered: System minor alarm in  fan tray 2

2012 Jul 20 13:52:17 n5k-1 %$ VDC-1 %$  %NOHMS-2-NOHMS_ENV_ERR_ALL_FAN_UP: Recovered: System minor alarm on  fans: One fan missing or failed

2012 Jul 20 13:52:33 n5k-1 %$ VDC-1 %$ %NOHMS-2-NOHMS_ENV_ERR_FAN_SPEED:  System minor alarm in fan tray 1: fan speed is out of range on fan 1.  12158 to 16211 rpm expected. 11739 rpm read

2012 Jul 20 13:52:33 n5k-1 %$ VDC-1 %$ %NOHMS-2-NOHMS_ENV_ERR_FAN_SPEED:  System minor alarm in fan tray 1: fan speed is out of range on fan 3.  12158 to 16211 rpm expected. 11816 rpm read

2012 Jul 20 13:52:33 n5k-1 %$ VDC-1 %$ %NOHMS-2-NOHMS_ENV_ERR_FAN_DOWN:  System minor alarm on fans: One fan missing or failed

2012 Jul 20 13:52:47 n5k-1 %$ VDC-1 %$ %NOHMS-2-NOHMS_ENV_ERR_FAN_SPEED:  System minor alarm in fan tray 2: fan speed is out of range on fan 1.  12158 to 16211 rpm expected. 11894 rpm read

2012 Jul 20 13:52:47 n5k-1 %$ VDC-1 %$ %NOHMS-2-NOHMS_ENV_ERR_FAN_SPEED:  System minor alarm in fan tray 2: fan speed is out of range on fan 3.  12158 to 16211 rpm expected. 11894 rpm read

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6 REPLIES
Cisco Employee

Fan warning on N5K after upgrading NX-OS from 5.0 to 5.1 or 5.2

If you have downgraded back to get it operational, can you post the following outputs?

show mod

show environment

show inventory

New Member

Fan warning on N5K after upgrading NX-OS from 5.0 to 5.1 or 5.2

Here is the output from "show mod" "show environment" and "show inventory" with NX-OS 5.0.

n5k-1# show module

Mod Ports  Module-Type                      Model                  Status

--- -----  -------------------------------- ---------------------- ------------

1    32     O2 32X10GE/Modular Universal Pla N5K-C5548UP-SUP        active *

3    0      O2 Daughter Card with L3 ASIC    N55-D160L3             ok

Mod  Sw              Hw      World-Wide-Name(s) (WWN)

---  --------------  ------  --------------------------------------------------

1    5.0(3)N2(1)     1.0     --

3    5.0(3)N2(1)     1.0     --

Mod  MAC-Address(es)                         Serial-Num

---  --------------------------------------  ----------

1    0005.73fc.2988 to 0005.73fc.29a7         JAF1523DTST

3    0000.0000.0000 to 0000.0000.000f         FOC153839YM

n5k-1#

##############################################################################

n5k-1# show environment

Fan:

------------------------------------------------------

Fan             Model                Hw         Status

------------------------------------------------------

Chassis-1       N5548P-FAN-B         --         ok

Chassis-2       N5548P-FAN-B         --         ok

PS-1            N55-PAC-750W-B       --         ok

PS-2            N55-PAC-750W-B       --         ok

Temperature

-----------------------------------------------------------------

Module   Sensor     MajorThresh   MinorThres   CurTemp     Status

                    (Celsius)     (Celsius)    (Celsius)        

-----------------------------------------------------------------

1        Outlet     67            57           40          ok            

Power Supply:

Voltage: 12 Volts

-----------------------------------------------------------

PS  Model                Input Power       Power     Status

                         Type  (Watts)     (Amp)          

-----------------------------------------------------------

1   N55-PAC-750W-B       AC     744.00     62.00     ok                 

2   N55-PAC-750W-B       AC     744.00     62.00     ok                 

Mod Model                   Power     Power       Power     Power       Status

                            Requested Requested   Allocated Allocated        

                            (Watts)   (Amp)       (Watts)   (Amp)              

--- ----------------------  -------   ----------  --------- ----------  --------

--

1    N5K-C5548UP-SUP        648.00    54.00       648.00    54.00       powered-

up

3    N55-D160L3             144.00    12.00       144.00    12.00       powered-

up

Power Usage Summary:

--------------------

Power Supply redundancy mode:                 Redundant

Power Supply redundancy operational mode:     Redundant

Total Power Capacity                             1488.00 W

Power reserved for Supervisor(s)                  648.00 W

Power currently used by Modules                   144.00 W

                                                -------------

Total Power Available                             696.00 W

                                                -------------

n5k-1#

#################################################################

n5k-1# show inventory

NAME: "Chassis", DESCR: "Nexus5548 Chassis"

PID: N5K-C5548UP       , VID: V01 , SN: SSI151700EW

NAME: "Module 1", DESCR: "O2 32X10GE/Modular Universal Platform Supervisor"

PID: N5K-C5548UP       , VID: V01 , SN: JAF1523DTST

NAME: "Fan 1", DESCR: "Chassis fan module"

PID: N5548P-FAN-B      , VID: N/A , SN: N/A

NAME: "Fan 2", DESCR: "Chassis fan module"

PID: N5548P-FAN-B      , VID: N/A , SN: N/A

NAME: "Power supply 1", DESCR: "AC power supply"

PID: N55-PAC-750W-B    , VID: V01 , SN: ART1525X1FU

NAME: "Power supply 2", DESCR: "AC power supply"

PID: N55-PAC-750W-B    , VID: V01 , SN: ART1525X1FT

NAME: "Module 3", DESCR: "O2 Daughter Card with L3 ASIC"

PID: N55-D160L3        , VID: V01 , SN: FOC153839YM

n5k-1#

Cisco Employee

Fan warning on N5K after upgrading NX-OS from 5.0 to 5.1 or 5.2

Thanks.. I had seen similar issue once in the past where N5548P-FAN-B was recognized as N5548P-FAN after an upgrade causing the error. I suggest that you open a TAC case and get the fans replaced to see if it helps. If you open a TAC case, do let me know the case number so that I can follow up with it.

New Member

Fan warning on N5K after upgrading NX-OS from 5.0 to 5.1 or 5.2

Managed to fix the problem. I had to replace both powersupplies and fan modules. It appears the Back-to-Front airflow provided by N55-PAC-750W-B power supply and N5548UP-FAN-B fan doesn't work with NX-OS 5.1 and 5.2. What works is N55-PAC-750W and N5548UP-FAN. 

Cisco Employee

Fan warning on N5K after upgrading NX-OS from 5.0 to 5.1 or 5.2

N55-PAC-750W-B power supply and N5548UP-FAN-B fan do work but you will have to replace the

N5548UP-FAN-B modules

New Member

Fan warning on N5K after upgrading NX-OS from 5.0 to 5.1 or 5.2

From what I can tell, we can't mismatch the FAN and PAC when it comes to the airflow. If I try to put N5548UP-FAN with  N55-PAC-750W-B the switch will automatically turn off. Both PS and FAN have to be either Front-to-Back or Back-to-Front airflow. That's why to run NX-OS 5.1 or 5.2 I had to replace both the PSs and the FANs.

Thanks for your help, it pointed me in the right direction.

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