Posted on March 24, 2020 7:11 pm
 |  Asked by Network Services
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HI,

I would like to get clarification as to what the Setpoint on the show environment temperature means

show environment temperature
System temperature status is: Ok
                                                                 Alert  Critical
                                               Temp    Setpoint  Limit     Limit
Sensor  Description                             (C)         (C)    (C)       (C)
------- ----------------------------------- ------- ----------- ------ ---------
1       CPU core0 temp sensor                  55.0   (82) 81.8     95       105
2       CPU core1 temp sensor                  55.0   (82) 81.8     95       105
3       CPU core2 temp sensor                  55.0   (82) 81.8     95       105
4       CPU core3 temp sensor                  55.0   (82) 81.8     95       105
5       CPU board temp sensor                  54.0   (70) 69.8     80        85
6       CPU VRM VCCIN temp sensor              58.0   (70) 69.8    105       110
7       CPU VRM VDDQ temp sensor               52.0   (70) 69.8    105       110
8       Back-panel temp sensor                 47.5   (55) 54.9     65        75
9       Management board temp sensor           36.8   (55) 54.9     65        75
10      Board sensor                           52.6   (80) 79.8    100       110
11      Bongo175                               56.4   (80) 79.8    100       125
12      Bongo350                               69.4   (80) 79.8    100       125
13      Fe3600                                 69.5   (80) 79.8    100       125
14      FrontAir                               24.6   (55) 54.9     75        80
15      Jericho0                               57.9   (80) 79.8    100       125
16      Jericho1                               54.4   (80) 79.8    100       125
17      Jericho2                               57.5   (80) 79.8    100       125

Any help is appreciated
Thanks,

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Posted by Alla Anunitya
Answered on March 25, 2020 10:11 am

Hi Team,

The Setpoint column, this is the temperature the switch is trying to maintain for a particular component. Arista EOS uses a closed-loop control system for cooling. Each temperature sensor in the system has its own setpoint (aka target) temperature that the system is trying to stabilize at. Temp(C) is the current temperature of the sensors and Setpoint(C) can be considered as a Target temperature.

The number in parenthesis is the base setpoint. It is the reference setpoint at 25C ambient. The other number is the base setpoint plus or minus some adjustment based on the current ambient. If the current ambient is higher (respectively lower) than 25C, the target is adjusted higher (respectively lower).

At any point in time, one temperature sensor's current Temp (C) is closer to its setpoint than any other sensors in the system and is therefore selected to be the driver for the overall thermostat (and is chosen as the driver of fan speeds). At another point in time, if a different sensor's temperature starts to rise then it may become the driver of the fan speeds. Basically it the current worst-case sensor where the worst case is in comparison to the setpoint of the sensor.  The setpoint varies a bit depending on the ambient conditions. The Setpoint(C) temperature cannot be manually changed.

Hope this helps. If there are any concerns/queries, please revert or feel free to raise a case with support@arsita.com

Regards,

Anu.

So when I have this ouput: System temperature status is: Ok Alert Critical Temp Setpoint Limit Limit Sensor Description (C) (C) (C) (C) ------- ----------------------------------- ------- ----------- ------ --------- 1 Cpu temp sensor 43.2 (60) 63.9 90 95 2 Cpu board temp sensor 36.2 (55) 58.9 75 80 3 Back-panel temp sensor 34.6 (50) 53.9 75 85 4 Board sensor 41.0 (60) 63.9 75 90 5 Board center sensor 42.2 (75) 78.8 90 60 6 Board right sensor 43.0 (75) 78.8 90 60 7 Board left sensor 42.0 (75) 78.8 90 60 8 Switch chip internal sensor 49.0 (95) 98.8 105 75 9 Internal ambient sensor 35.0 (65) 68.8 80 55 10 Front-panel temp sensor 40.0 (65) 68.8 80 55 11 mux1 Avago temp sensor 54.8 (85) 88.8 110 125 This means that for "Switch chip internal sensor" it aims for around 98.8° celsius? And for "Board center sensor" it's 78°? Isn't this a bit high? Is there somewhere a documentation about which temperature is OK, Warning, Critical etc.?
(Support BNC at March 30, 2020 10:02 am)

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