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Cisco Bug: CSCvu30972 - ASR903: All readings for Power supply unit reflect as zero though the unit is functional

Last Modified

Sep 21, 2020

Products (1)

  • Cisco ASR 900 Series Aggregation Services Routers

Known Affected Releases

15.3(3)S

Description (partial)

PEM reading are reflecting zero for a functional PSU.

Symptom:
Power supply reading are reflecting zero as seen below: 


P1          PEM Iout         Normal          0    A         na
P1          PEM Vout        Normal          0    V DC      na
P1          PEM Vin         MIN             0    V DC      na
P1          Temp: Temp 1    Normal          0    Celsius   (80 ,90 ,95 ,100)(Celsius)
P1          Temp: Temp 2    Normal          0    Celsius   (80 ,90 ,95 ,100)(Celsius)

++ Following logs are observed in tracelogs :

2020/04/30 03:55:46.299 [envlib] [29597]:  UUID: 0, ra: 0 (ERR):  PMBUS sensor PEM Vout, register 4 could not be read, pfu 1, status 22
2020/04/30 03:55:46.304 [syshw] [29597]:  UUID: 0, ra: 0 (ERR):  syshw: idx 3 out of bounds, reg_width 0
2020/04/30 03:55:46.304 [envlib] [29597]:  UUID: 0, ra: 0 (ERR):  PMBUS sensor PEM Vin, register 3 could not be read, pfu 1, status 22
2020/04/30 03:55:46.309 [syshw] [29597]:  UUID: 0, ra: 0 (ERR):  syshw: idx 6 out of bounds, reg_width 0
2020/04/30 03:55:46.309 [envlib] [29597]:  UUID: 0, ra: 0 (ERR):  PMBUS sensor PEM Iout, register 6 could not be read, pfu 1, status 22
2020/04/30 03:55:46.372 [syshw] [29597]:  UUID: 0, ra: 0 (ERR):  syshw: idx 0 out of bounds, reg_width 0
2020/04/30 03:55:46.372 [envlib] [29597]:  UUID: 0, ra: 0 (ERR):  PMBUS sensor Temp: Temp 1, register 0 could not be read, pfu 1, status 22
2020/04/30 03:56:46.260 [syshw] [29597]:  UUID: 0, ra: 0 (ERR):  syshw: idx 1 out of bounds, reg_width 0
2020/04/30 03:56:46.260 [envlib] [29597]:  UUID: 0, ra: 0 (ERR):  PMBUS sensor Temp: Temp 2, register 1 could not be read, pfu 1, status 22

Conditions:
None
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