summit temperature ranges

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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 #
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Dave Martin

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Posted 1 year ago

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Drew C., Community Manager

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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
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Brandon Clay, Escalation Support Engineer

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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...
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Ron Huygens, Employee

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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.

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Dave Martin

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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)
(Edited)
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Drew C., Community Manager

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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.
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Ron Huygens, Employee

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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.