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What values should I expect from OID rPDULoadStatusLoad on my Rack PDU 1G?
Issue
Clarification needed on the rPDULoadStatusLoad SNMP OID.
Product Line
- Rack Power Distribution
- AP78XX Metered Rack PDUs
- AP79XX Switched Rack PDUs
- All serial numbers
- rpdu firmware v3.5.8 and higher
- Utilizing SNMPv1 or SNMPv3 for load status information
Cause
Applicable to AP78XX and AP79XX 1G Rack PDUs only, object Identifier rPDULoadStatusLoad (.1.3.6.1.4.1.318.1.1.12.2.3.1.1.2) has a description: "This OID will return the phase/bank load measured in tenths of Amps". This will have different meaning across different types of rack mount power distribution units.
Resolution
On a single phase, single bank PDU there will only be one instance returned, which is the amp draw through the entire PDU.
Single Phase Multibank PDU
Instance 1: Total Current (Bank 1 + Bank 2)
Instance 2: Total Current on Bank 1
Instance 3: Total Current on Bank 2
Instance 2: Total Current on Bank 1
Instance 3: Total Current on Bank 2
On multibank PDU's it will return 3 instances:
Three Phase Multibank PDU
Instance 1: Bank 1
Instance 2: Bank 2
Instance 3: Bank 3
Instance 2: Bank 2
Instance 3: Bank 3