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Why default temperature of the switch X480 changes when VIM module is connected.

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TitleWhy default temperature of the switch X480 changes when VIM module is connected.
Question
Why default temperature of the switch X480 changes when VIM module is connected?
* X480-48t.2 # show temperature

Field Replaceable Units               Temp (C)   Status   Min  Normal   Max
---------------------------------------------------------------------------
Switch         : X480-48t               29.50    Normal   -10    0-45  55
* X480-48t.2 #


* X480-48t(40G4X).2 # show temp

Field Replaceable Units               Temp (C)   Status   Min  Normal   Max
---------------------------------------------------------------------------
Switch         : X480-48t(40G4X)        29.00    Normal   -10    0-75  80
VIM3-40G4X-1   :                        30.00    Normal     0   10-55  60
VIM3-40G4X-1   : 
* X480-48t(40G4X).3 #

 
Environment
  • All Summit X480 switches.
  • All Exos versions.
Answer
This is an expected behavior. Please fine the additional details below:
  • X480-48t with VIM and without VIM are considered as different variants of X480 platform switches.
  • Algorithms used for deriving temperature parameters(Min,Normal,Max) and to calculate current operating temperature varies for each hardware variants
  • These numbers/algorithms are derived at the time of hardware qualification itself and it is based on various sensor readings located on board.
Additional notes

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