topic RE: summit temperature ranges in ExtremeSwitching (EXOS/Switch Engine)

summit temperature ranges

Dave_Martin — Wed, 24 May 2017 01:54:00 GMT

Surely these can't be right? both devices are version 16.1.4.2 patch 1-10

1 # sho temp
Field Replaceable Units Temp (C) Status Min Normal Max
---------------------------------------------------------------------------
Switch : X460G2-48t-10G4 90.28 Normal 0 10-100 110
2 #

1 # sho temp
Field Replaceable Units Temp (C) Status Min Normal Max
---------------------------------------------------------------------------
Switch : X480-48t(10G4X) 33.50 Normal -10 0-75 80
VIM2-10G4X-1 : 38.50 Normal -10 0-75 80
VIM2-10G4X-1 :
2 #

RE: summit temperature ranges

Drew_C — Wed, 24 May 2017 01:57:00 GMT

Hi Dave,
The G2s report CPU/chip temperature and not ambient temperature like your X480 does.
Please see this article for more information: Normal operating temperature range for Summit G2 switches or Summit switches running EXOS 21.x or higher

RE: summit temperature ranges

BrandonC — Wed, 24 May 2017 01:59:00 GMT

Hi Dave,

In the G2 switches, the output of 'show temp' changed from reporting ambient temperature to reporting the CPU temperature.

Because of this, you sometimes see large discrepancies in temperature between the G2 Summits and non-G2 Summits even if they are installed in the same location.

See the following GTAC Knowledge article for further details:
https://gtacknowledge.extremenetworks.com/articles/Q_A/Normal-operating-temperature-range-for-a-Summ...

RE: summit temperature ranges

Ron_Huygens — Wed, 24 May 2017 02:02:00 GMT

Basically, For the G2's the temperature sensor is a virtual sensor whose temperature is calculated based on several factors like temperature value from other sensors and PoE output. Fan speed will be increased accordingly as per this calculation.Algorithm used for calculating temperature will vary for each hardware variant to ensure that the system (including board devices and Power Supply) does not overheat.

So most of the time it will be the CPU temperature but also PoE drivers can become a important heat source.

RE: summit temperature ranges

Dave_Martin — Wed, 24 May 2017 02:37:00 GMT

The 480 spec sheet says it can go to 40c, but the above says 80c (or 75), so is the 480 doing something similar as well? (note that this 480 is not a G2)

RE: summit temperature ranges

Drew_C — Wed, 24 May 2017 02:37:00 GMT

I'm not sure why the spec sheet is different than what's listed in the switch output. 40°C is quite low, so I would imagine that 80° is more accurate.

RE: summit temperature ranges

Ron_Huygens — Wed, 24 May 2017 02:37:00 GMT

I am not a hardware engineer but I assume that the 40C is the ambient temperature.
based on that it can reach on the maximum 75C on the CPU motherboard.