Catalyst 9300 switch : FRU power supply B powered off ( Status --- Disabled )

[bensonlei]

Hi, guys,

We have a Catalyst 9300 switch stack running ( three switches stacking, each switch has two power supplies ); and the devices information as below:

Switch Ports Model SW Version SW Image Mode
------ ----- ----- ---------- ---------- ----
* 1 53 C9300L-48T-4X 16.12.4 CAT9K_IOSXE INSTALL
  2 53 C9300L-48T-4X 16.12.4 CAT9K_IOSXE INSTALL
  3 53 C9300L-48T-4X 16.12.4 CAT9K_IOSXE INSTALL

we got alert message of following description last night :

Messages from our monitoring tool:

=============================

PROBLEM: Operational status for Switch 3 - Power Supply B, Normal was changed: Shutdown (4) (*UNKNOWN*)
PROBLEM: Operational status for Switch 3 - Power Supply B, Normal is FAILED: Shutdown (4) (*UNKNOWN*)
PROBLEM: Operational status for Switch 3 - Power Supply B, Shutdown is FAILED: Shutdown (4) (*UNKNOWN*)
OK: Operational status for Switch 3 - Power Supply B, Normal was changed: Shutdown (4)

The switch event log:

============================================

May 23 04:27:08.607: %PLATFORM_FEP-6-FRU_PS_OIR: Switch 3: FRU power supply B inserted
May 23 04:27:08.608: %PLATFORM_FEP-6-FRU_PS_OIR: Switch 3: FRU power supply B powered off

CLI command shows ( Serial# is modified

=====================================

SW    PID                               Serial#             Status                    Sys Pwr       PoE Pwr    Watts
--      ------------------    ----------     ---------------  -------      -------     -----
3A     PWR-C1-350WAC-P    DyyyyyyyyXL   OK                         Good           n/a             350
3B     PWR-C1-350WAC-P    DyyyyyyyyXE   Disabled                 Bad             n/a             350

Any advice :

1.  Supply problem ?

2.  Switch stack problem ?

3 . IOS issue ?

With many thanks in advance.

Benson LEI

[Leo Laohoo]

1. Get that power supply replaced
2. Upgrade the firmware.  16.12.4 is, to put it mildly, not stable.

[julian.bendix]

I can second @Leo Laohoo answer, we are currently running either 16.9.7 or 16.12.5b - both really good so far!

[marce1000]

 - Also have a visual inspection of the power supply. Usually there is a led-status indicator. Sometimes these messages are due to software bugs. Upgrading to an advisory release is then advised.

 M.

[bensonlei]

Hi, guys,

Thanks so much for your advices.

The Supply's LED (the red LED) was found flashing while the onsite engineer reached the site, any further recommendation ?

Many thanks

Benson LEI

[Leo Laohoo]

---

@bensonlei wrote:

any further recommendation

---

Upgrade the firmware of your switch or you'll be sorry.

[bensonlei]

Hi, Leo,

Your recommendation may be correct, according to the articles written in the community.

However,  these bugs have been fixed ( or the one we found ) with the IOS version "Gibraltar-16.12.04"  ??  

such as :  

1.  bug CSCvn40414.

2.  bug/CSCvo31222

3.  bug/CSCug29756

Many Many thanks

[marce1000]

 - The particular power supply is probably broken and needs to be replaced.

 M.

[bensonlei]

Hi, Marce,

Sure, We shall replace a new supply;

secondly, we also want to confirm it is not a software issue.

So, your guys advices are highly appreciated.

[Leo Laohoo]

---

@bensonlei wrote:

secondly, we also want to confirm it is not a software issue.

---

When an appliance is running on the infernal 16.12.4 anything can be "software issue".  

[marce1000]

 - Usually when it is a software issue, you will get wrong output from the relevant show-commands, but no alarm-indicators on the PS itself.

 M.