Greetings!
I have a number of SF300-24P (802.3af), SF300-24PP (802.3at), SF300-48P, and SG200-26P Cisco switches, all at firmware revision 1.4.8.6
(There is a newer firmware 1.4.10.06 published 4 days ago: I will install this only if required).
The voltage/current sensors are constantly complaining that they are either under/over threshold. For example, below are the logs on a port drawing 3500 mW for a Ubiquiti Unifi access point model UAP-AC-M: voltage range from 0V (!) to 92V for a device that should draw 37 to 57 V PoE levels. I have 29 of these devices scattered over the network and I can rule out simple malfunction of any/all devices.
More intriguing is the 0.0975A current "threshold" used to issue these warnings: it does not make sense if Watts are still the product of Volts by Ampps ;-).
Is it possible that the MiB for these devices is out of whack? I recently updated my Observium CE to 18.9.9420 (5th September 2018) but this issue has been annoying me for quite some time.
Please note that I have similar results for all kinds of IP cameras : however, I do not have issues for ports that are connected to Cisco SG200-08 PoE switches and for which the only warnings I get is when the output voltage suddenly drops to zero. Unfortunately, these devices do not support SNMP.
Kind regards,
Serge Caron
2019-04-29 21:02:10 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 92 V (> 60.95 V) 2019-04-29 20:20:49 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 90 V (> 60.95 V) 2019-04-29 20:00:37 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 92 V (> 60.95 V) 2019-04-29 19:35:24 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 81 V (> 60.95 V) 2019-04-29 18:07:02 fa14 PoE Voltage Voltage fa14 PoE Voltage under threshold: 30 V (< 45.05 V) 2019-04-29 17:57:25 fa14 PoE Voltage Voltage fa14 PoE Voltage under threshold: 31 V (< 45.05 V) 2019-04-29 17:50:40 fa14 PoE Current Current fa14 PoE Current above threshold: 0.139 A (> 0.0975 A) 2019-04-29 17:46:41 fa14 PoE Voltage Voltage fa14 PoE Voltage under threshold: 31 V (< 45.05 V) 2019-04-29 17:00:36 fa14 PoE Voltage Voltage fa14 PoE Voltage under threshold: 31 V (< 45.05 V) 2019-04-29 16:52:34 fa14 PoE Voltage Voltage fa14 PoE Voltage under threshold: 31 V (< 45.05 V) 2019-04-29 15:07:18 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 84 V (> 60.95 V) 2019-04-29 14:57:19 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 80 V (> 60.95 V) 2019-04-29 14:42:43 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 62 V (> 60.95 V) 2019-04-29 14:42:43 fa14 PoE Current Current fa14 PoE Current above threshold: 0.113 A (> 0.0975 A) 2019-04-29 14:22:06 fa14 PoE Voltage Voltage fa14 PoE Voltage under threshold: 31 V (< 45.05 V) 2019-04-29 14:22:06 fa14 PoE Current Current fa14 PoE Current above threshold: 0.112 A (> 0.0975 A) 2019-04-29 14:10:37 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 92 V (> 60.95 V) 2019-04-29 13:47:30 fa14 PoE Voltage Voltage fa14 PoE Voltage under threshold: 38 V (< 45.05 V) 2019-04-29 13:22:27 fa14 PoE Current Current fa14 PoE Current above threshold: 0.112 A (> 0.0975 A) 2019-04-29 13:05:35 fa14 PoE Current Current fa14 PoE Current above threshold: 0.114 A (> 0.0975 A) 2019-04-29 12:41:57 fa14 PoE Voltage Voltage fa14 PoE Voltage under threshold: 0 V (< 45.05 V) 2019-04-29 12:25:23 fa14 PoE Current Current fa14 PoE Current above threshold: 0.112 A (> 0.0975 A) 2019-04-29 11:21:58 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 90 V (> 60.95 V) 2019-04-29 10:52:05 fa14 PoE Voltage Voltage fa14 PoE Voltage under threshold: 32 V (< 45.05 V) 2019-04-29 10:46:03 fa14 PoE Current Current fa14 PoE Current above threshold: 0.11 A (> 0.0975 A) 2019-04-29 10:30:36 fa14 PoE Voltage Voltage fa14 PoE Voltage under threshold: 39 V (< 45.05 V) 2019-04-29 10:25:34 fa14 PoE Current Current fa14 PoE Current above threshold: 0.11 A (> 0.0975 A) 2019-04-29 10:00:24 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 82 V (> 60.95 V) 2019-04-29 09:06:30 fa14 PoE Voltage Voltage fa14 PoE Voltage under threshold: 33 V (< 45.05 V) 2019-04-29 08:55:46 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 104 V (> 60.95 V) 2019-04-29 08:40:50 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 90 V (> 60.95 V) 2019-04-29 07:37:17 fa14 PoE Current Current fa14 PoE Current above threshold: 0.11 A (> 0.0975 A) 2019-04-29 07:16:51 fa14 PoE Voltage Voltage fa14 PoE Voltage under threshold: 32 V (< 45.05 V) 2019-04-29 07:07:29 fa14 PoE Current Current fa14 PoE Current above threshold: 0.11 A (> 0.0975 A) 2019-04-29 07:00:34 fa14 PoE Voltage Voltage fa14 PoE Voltage above threshold: 84 V (> 60.95 V)