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ASR-9006-FAN may show negative temperate due to software issue CSCua48772

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Cisco Employee
Symptoms: The fan tray may show abnormal temperature reading .

Sample output from XR 4.2.1 is shown below:
RP/0/RSP0/CPU0:ios#admin show environment temperatures

Wed Aug 28 21:22:54.263 UTC

R/S/I   Modules Sensor                  (deg C)

0/RSP0/*

        host    Inlet0                  26.4
        host    Hotspot0                38.1

                            

0/RSP1/*

        host    Inlet0                  26.0
        host    Hotspot0                37.1

                            

0/FT0/*

        host    Inlet0                  -50.0
        host    Hotspot0                -50.0

                            

0/FT1/*

        host    Inlet0                  -50.0
        host    Hotspot0                -50.0

Condition: This can be seen during normal operations.

Workaround : This is a Software issue and there is no workaround. XR 4.3.2 and 4.2.3 fixes this issue.

Note: Please do not replace HW, as Replacing HW will not fix the issue.
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