POE port_fault

[Carol_Oughton]

Please advise if this is a software bug, but our x440-24p switch produced an error: POE port_fault and cause our access points to fail. To fix the issue the PoE had to be disable and re-enabled on the entire switch. However, the VoIP phones were no affected.

[BrandonC]

To avoid what David is describing, you want a double-conversion UPS.

This type of UPS will constantly power the load (in this case the switch) from the battery, to prevent this delay between switching to the battery.

[davidj_cogliane]

FYI
We have found UPSs do not always prevent power issues, we have seen older UPSs or units with older batteries take too long to transfer to battery and as a result the switch can reboot or enter an odd state before the transfer takes place.

[Carol_Oughton]

Brown outs don't happen often, this was unusual & it knocked out power in a development, so something outside must have happened. Yes, the switch is on a UPS, as all of our switches are.

Thanks again everyone for your assistance and pointing to great information.

[Patrick_Voss]

Do these brown outs happen often? Are the switches plugged into a UPS? I have seen the exact scenario in the past. Unfortunately this happens to prevent further issues with the switch.

[Carol_Oughton]

We did have a brown-out which may have caused the issue.