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Community Member

Power supply error, Cisco switch 3750

Hello,

Can someone help me with a  power supply problem...?

Switch cisco WS-C3750-24P is showing "Unavail" from sh env all

Switch3750#sh env all

FAN is OK

TEMPERATURE is OK

SW  PID                 Serial#     Status           Sys Pwr  PoE Pwr  Watts

--  ------------------  ----------  ---------------  -------  -------  -----

1  Built-in                                         Unavail

2  Built-in                                         Good

3  Built-in                                         Good

4  Built-in                                         Good

Does it means that power supply 1 was removed? failed?

Do you know about another command to see more details?

Thanks,

2 ACCEPTED SOLUTIONS

Accepted Solutions
Cisco Employee

Power supply error, Cisco switch 3750

Hi,

Can you pls attach full outputs from "sh env all" "sh env st". It seems that you have RPS connected and those provide power thus one of the internal PSs is unavailable. You can force RPS to stop providing power and see if internal comes up.

Nik

Cisco Employee

Power supply error, Cisco switch 3750

If internal power has short hit, device can't switch back to internal supply
while power restored and start using external power.
To fix the issue, you need to disconnect external power to normalize the status.

Hope that helped.

Cheers,

Sweta

Please rate useful posts.

4 REPLIES
Cisco Employee

Power supply error, Cisco switch 3750

Hi,

Can you pls attach full outputs from "sh env all" "sh env st". It seems that you have RPS connected and those provide power thus one of the internal PSs is unavailable. You can force RPS to stop providing power and see if internal comes up.

Nik

Cisco Employee

Power supply error, Cisco switch 3750

If internal power has short hit, device can't switch back to internal supply
while power restored and start using external power.
To fix the issue, you need to disconnect external power to normalize the status.

Hope that helped.

Cheers,

Sweta

Please rate useful posts.

Community Member

Power supply error, Cisco switch 3750

Thanks a lot, switch was rebooted and the PS-1 came to "good".

Regards,

Community Member

Re: Power supply error, Cisco switch 3750

Hi All,

Can you please help to fix the issue,

sw03#sh env all

FAN is OK

TEMPERATURE is OK

Temperature Value: 45 Degree Celsius

Temperature State: GREEN

Yellow Threshold : 58 Degree Celsius

Red Threshold    : 68 Degree Celsius

SW  PID                 Serial#     Status           Sys Pwr  PoE Pwr  Watts

--  ------------------  ----------  ---------------  -------  -------  -----

1  Built-in                                         Unavail

SW  Status          RPS Name          RPS Serial#  RPS Port#

--  -------------   ----------------  -----------  ---------

1   Active          <>

sw03#sh env st

SWITCH: 1

FAN is OK

TEMPERATURE is OK

Temperature Value: 45 Degree Celsius

Temperature State: GREEN

Yellow Threshold : 58 Degree Celsius

Red Threshold    : 68 Degree Celsius

POWER is FAULTY

RPS is SUPPLYING

As per the sh env stack, seem like power is faulty ?. Can Someone please tell how to rectify the problem.

Madan

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