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Rising star

3945 router CPU temperature?

I am trying to find out what the 'normal' operating temperature of the CPU in a 3945 router is?

We have just replaced some 2800 routers for 3945's and the NMS server initially complained about the new router CPU temperature being too high.  Compared to the 2800 the CPU temperature is much hotter - 50 degrees celcius as opposed to 20-smothing degrees.  I have searched but can't find what are considered 'normal'?

This is the output:

router#sho environment all
SYSTEM POWER SUPPLY STATUS
==========================
Internal Power Supply 1 Type: DC
Internal Power Supply 1 12V Output Status: Normal

Internal Power Supply 2 Type: DC
Internal Power Supply 2 12V Output Status: Normal

SYSTEM FAN STATUS
=================
Fan 1 OK, Low speed setting
Fan 2 OK, Low speed setting
Fan 3 OK, Low speed setting
Fan 4 OK, Low speed setting
Fan 5 OK, Low speed setting

SYSTEM TEMPERATURE STATUS
=========================
Intake Left temperature: 19 Celsius, Normal
Intake Right temperature: 20 Celsius, Normal
Exhaust Right temperature: 20 Celsius, Normal
Exhaust Left temperature: 24 Celsius, Normal
CPU temperature: 51 Celsius, Normal
Power Supply Unit 1 temperature: 26 Celsius, Normal
Power Supply Unit 2 temperature: 25 Celsius, Normal

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

SYSTEM POWER
===============
Motherboard Components Power consumption = 134.5 WPower consumption =
NM/SM slot 4 57.3 W
Total System Power consumption is: 191.8 W

Environmental information last updated 00:00:18 ago

3 REPLIES 3
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Hall of Fame Master

As long the command output  shows 'normal', then it is normal and there is nothing to worry about it.

You cannot use comparison to different platforms.

Highlighted

Hi Paolo, I appreciate I can't compare the different platforms, however the customer asked the question about what was 'normal' and I searched and can't find anything.  The NMS platform needs tweaking to tell it what is 'not normal'.  I should have checked with the command 'show environment table' - this tells me up to 95 degrees celcuis is normal...

Andy

Highlighted
Beginner

I checked 5 different 3845, I had one at 42c and three were 50-51c, one was 52c.

Found this:

http://www.cisco.com/en/US/docs/routers/access/3800/hardware/installation/guide/38pre.html#wpxref12553

It says:

Cisco 3800 series routers operate at a temperature  of 32 to 104 degrees F (0 to 40 degrees C) and a humidity of 5 to 95  percent (noncondensing).

Though that cannot be completely accurate or I am misreading the meaning.

One of my 3845 with a new version of code shows a alert setting:
Intake temp warning: threshold 55

Core temperature warning: enabled, threshold: 70 (CPU: 90).

I would say 50c is a safe temperature.