switch hang when outage of one power

[xiaowei-lin]

Hello experts,

would you please analyze the log and give some suggestion?

Thanks

Best Regards

Richard

[kenk]

Hello Richard,

Can you describe the problem in greater detail?  I do see (in the logging log) that power supply 1 is

going down...have you figured out why that's happening?  (e.g. do you have a power source issue?)

Regards,

Ken

[xiaowei-lin]

Hello kenk,

we have two switch in site, when shutdown one way power of UPS, all ports of the switch was hang, another switch is ok.

then I done powercycle for the switch, the issue was gone.

I don't know why to cause this? the same issue was appear before, then i done a upgrade IOS for the switch.

please view "show system reset-reason".

Thanks for your support.

[mikram]

Hi

How is power supplies configured on your switch? redundant mode or combined mode?

Cheers

[xiaowei-lin]

redundancy mode,

Power Usage Summary:
--------------------
Power Supply redundancy mode:                   redundant

Total Power Capacity                            800.10   W

Power reserved for Supervisor(s)[-]             418.32   W
Power reserved for Fan Module(s)[-]             47.88    W
Power currently used by Modules[-]              184.80   W

                                                -------
Total Power Available                           149.10   W
                                                -------

[kenk]

Thanks for sharing the power mode (being redundant, there *should* be no impact to the switch when 1 power

supply fails or loses power).

I did a quick search for any known matching bugs, but didn't find any.

I'd advise opening a TAC Service Request for furhter analysis and to determin the root cause of the hang.

Regards,

Ken