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Cisco Bug: CSCvi92225 - Power supply shows as Shutdown even if the switch is operational

Last Modified

Apr 16, 2018

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

7.0(3)I5(1.99)

Description (partial)

Symptom:
Power supply shows as Shutdown even if the switch is operational

Conditions:
- Device: N9K-C93108TC-EX-B
- Version: 7.0.3.I5.1
- PSU: NXA-PAC-650W-PI (SN: LiteOn // example, LIT210725U5)

Recreation step:

a. removing power source cable itself from PSU
b. After 30min or 1hour later, reconnecting power source cable to PSU then "Symptom A" happens.(If the power source cable is re-connected within 5min, the "Symptom A" doesn't happen.)
  c. [Symptom A] The PSU status is still showed up as "Shutdown" even PSU LED is green. This issue happens multiple devices as the customer tried to check this symptom on several parts/chassis.
       as03.a0803a.n93108t.krlgp# show environment
    Power Supply:
    Voltage: 12 Volts
    Power                             Actual      Actual        Total
    Supply    Model                   Output      Input      Capacity    Status
                                    (Watts )    (Watts )     (Watts )
    -------  -------------------  ----------  ----------  ----------  --------------
    1        NXA-PAC-650W-PI             0 W         0 W         0 W     Shutdown
    2        NXA-PAC-650W-PI            78 W       103 W       650 W     Ok
d. [Symptom B] Additionally, when one of PSU is removed, the other PSU status is showed up as "Shutdown".

    as09.a2220b.n93108t.krlgp# show environment power
    Power Supply:
    Voltage: 12 Volts
    Power                             Actual      Actual        Total
    Supply    Model                   Output      Input      Capacity    Status
                                    (Watts )    (Watts )     (Watts )
    -------  -------------------  ----------  ----------  ----------  --------------
    1        NXA-PAC-650W-PI             0 W         0 W         0 W     Shutdown
    2        NXA-PAC-650W-PI             0 W         0 W         0 W     Shutdown
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