Cisco 3945 - %ENVMON-1-CPU_WARNING_OVERTEMP

[johnlloyd_13]

hi all,

got an alarm on one of our core 3945 router.

is this for RMA? is for the 1x fan or whole chassis?

Aug  4 01:06:43.262 UTC: %ENVMON-4-ONE_FAN_LOW_RPM: Warning: Fan 2 is running at low RPM.  Rotation speed is now high for all other fans.  Fan Tray replacement is recommended.
Aug  4 01:07:13.297 UTC: %ENVMON-1-CPU_WARNING_OVERTEMP: Warning: CPU temperature 105C exceeds threshold 95C.  Please resolve system cooling immediately to prevent system damage

sh envi
SYSTEM POWER SUPPLY STATUS
==========================
 Internal Power Supply 1 Type: AC
 Internal Power Supply 1 12V Output Status: Normal

 Internal Power Supply 2 Type: Absent   <<<

SYSTEM FAN STATUS
=================
 Fan Rotation Alert: Total 1 Fan Low RPM   <<<
 Fan 1 OK, Maximum speed setting
 Fan 2 Low RPM   <<<
 Fan 3 OK, Maximum speed setting
 Fan 4 OK, Maximum speed setting
 Fan 5 OK, Maximum speed setting

SYSTEM TEMPERATURE STATUS
=========================
 Intake Left temperature: 36 Celsius, Normal
 Intake Right temperature: 29 Celsius, Normal
 Exhaust Right temperature: 44 Celsius, Normal
 Exhaust Left temperature: 49 Celsius, Normal
 CPU temperature: 106 Celsius, Over-Temperature   <<<
 Power Supply Unit 1 temperature: 40 Celsius, Normal

REAL TIME CLOCK BATTERY STATUS
==============================
 Battery OK (checked at power up)

SYSTEM POWER
===============
 Motherboard Components Power consumption = 79.0 W
 Total System Power consumption is: 79.0 W

 Environmental information last updated 00:00:07 ago

also, i noticed the confreg is 0xF.

can i change this to 0x2102 without causing disruption or do i need to reload?

chnology Package License Information for Module:'c3900'

-----------------------------------------------------------------
Technology    Technology-package           Technology-package
              Current       Type           Next reboot  
------------------------------------------------------------------
ipbase        ipbasek9      Permanent      ipbasek9
security      None          None           None
uc            None          None           None
data          datak9        Permanent      datak9

Configuration register is 0xF

[Leo Laohoo]

You will need to open a TAC Case to RMA the fan assembly.  When the fan assembly arrives, it will also include (hopefully) a detailed instruction on how to replace it.  

[johnlloyd_13]

leo,

salamat pre!

have you previously encountered this issue? are you able to share the instructions for fan installation?

i also noticed PSU2 is not detected. 'asbent' on show envi and blank on show inv.

is this for RMA as well? do these envi logs related to the PSU issue?

[Leo Laohoo]

Pre!

I have replaced faulty fan assemblies with 2800.  The ISR G1/G2 are suppose to have modular parts so you don't have to RMA the complete unit (higher costs to Cisco).  

Installing and Upgrading Fans in Cisco 3825 Series Routers

[Leo Laohoo · Accepted solution]

Forgot to mention, pre.  

You open a TAC Case on the serial number of your appliance.  Cisco will then send you the replacement part.  

Show them the output to the command "sh env status" and this is more than enough.

[Jothiprakash]

HI ..

  I got an alarm on one of our 3945 router. So please let me know what is the replacement part fan try or whole chassis ....?

(Note:- have using to CISCO3945-CHASSIS)

[Abdul Salaam Khan]

Hi John,

As per the error you ned to replace the complete Fan tray i dout about single Fan replacemnet below are the part number whihc you can order depending on you Devices,

3900-FANASSY=   (Cisco 3925/3945 Fan Assembly (Bezel included))

3900-FANASSY-NEBS= Cisco 3925/3945 Fan Assembly for NEBS (w/3900-FANFLTR-NEBS)

For changing config register to 0x2102 won't have any impact on production but it will require reload for applying the new config register vlaue.

Hope this answers your query