Does anyone know if there's a way to monitor and alert on PoE output on Dell switches?
Per page 159 of Dell PowerConnect 55xx Systems User Guide, you should be able to do this via traps:
3 Enter the following parameters: – System Usage Threshold (1-99 Percent) — Enter the percentage of power consumed before a trap is generated. – Traps — Enable/disable traps if system usage goes over the threshold. The possible options are: • Enable — Enables PoE traps on the device. If traps are enabled, you must also enable SNMP, and configure at least one SNMP notification recipient. • Disable — Disables PoE traps on the device
there is a standard MIB for PoE support -- I think I put in an enhancement request for this to be added to UDT
in the mean time you can use a UnDP to putt the values back into the database, where you can then do something with them (draw graphs, generate alerts)