Odd power supply fault callhome emails on Cisco 2232 FEXs?

[paul.3.robertson]

We recently enabled smtp callhome for our ucs pod a few days ago. Since then, we've received more than a dozen email bursts about power supply failures in each of the four Cisco Nexus 2232TP FEXs in our pod. In each case, we get a "Recovered" email within a minute or two, and we're not seeing power supply failure emails for any other devices within the UCS pod.

Here's a sample email burst from this morning, showing the subject lines within my email inbox:

System Notification from atl01-ucsf01a-A - environment:major - 2012-10-23 06:01:27 GMT-00:00 Recovered : Power supply 2 in fex 6 operability: inoperable

System Notification from atl01-ucsf01a-A - environment:major - 2012-10-23 06:01:27 GMT-00:00 Recovered : Power supply 2 in fex 6 operability: inoperable

System Notification from atl01-ucsf01a-A - environment:major - 2012-10-23 06:01:27 GMT-00:00 Recovered : Power supply 2 in fex 6 operability: inoperable

System Notification from atl01-ucsf01a-A - environment:major - 2012-10-23 06:01:27 GMT-00:00 Recovered : Power supply 2 in fex 6 power: error

System Notification from atl01-ucsf01a-A - environment:major - 2012-10-23 06:01:27 GMT-00:00 Recovered : Power supply 2 in fex 6 power: error

System Notification from atl01-ucsf01a-A - environment:major - 2012-10-23 06:01:27 GMT-00:00 Recovered : Power supply 2 in fex 6 power: error

System Notification from atl01-ucsf01a-A - environment:major - 2012-10-23 06:00:58 GMT-00:00 Power supply 2 in fex 6 operability: inoperable

System Notification from atl01-ucsf01a-A - environment:major - 2012-10-23 06:00:58 GMT-00:00 Power supply 2 in fex 6 operability: inoperable

System Notification from atl01-ucsf01a-A - environment:major - 2012-10-23 06:00:58 GMT-00:00 Power supply 2 in fex 6 operability: inoperable

System Notification from atl01-ucsf01a-A - environment:major - 2012-10-23 06:00:58 GMT-00:00 Power supply 2 in fex 6 power: error

System Notification from atl01-ucsf01a-A - environment:major - 2012-10-23 06:00:58 GMT-00:00 Power supply 2 in fex 6 power: error

If we were seeing this from just one fex, I'd suspect a hardware issue. If any of the other UCS devices (rackmount/blade servers, fabric interconnects, etc) reported similar issues, I'd suspect a power feed problem within the DC.

But this has me baffled. If it helps, the UCS pod is running firmware 2.0.3c

Cheers,

Paul

[padramas]

Hello Paul,

can you please share following output

scope fex

show psu detail

connect nxos

show logging | egrep -i 'power|gpio'

Padma

[paul.3.robertson]

Padma,

Thanks for the reply. I've attached the requested information, and let me know if I can provide any additional details.

Cheers,

Paul

[padramas · Accepted solution]

Thanks Paul,

It is known ( cosmetic ) issue with power supply model. 

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtz84683

The above is resolved in recent version of Nexus 5K switch software. New defect to port the fix to UCSM has been submitted today

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCuc87547

It will take a while to get published on web site.

Even though they are cosmetic, I would suggest you open a TAC SR with UCSM, FEX tech support and above bug IDs so that we can track the resolution.

HTH

Padma

[paul.3.robertson]

Thanks for the reply, and it's a bit of a relief that this is a known issue. I'll open a TAC SR as you suggest.

Cheers,

Paul