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UniFi - How do secondary Ethernet ports work on UAPs?

Answer


Secondary UAP Ethernet ports don't provide PoE passthrough (to run current to a second powered device), but they do support data passthrough. It serves as a bridged interface between main / secondary Ethernet port.

This means users can connect the PoE cable to the main Ethernet port to supply power, then connect another, non-PoE device (e.g., IP camera, extra UAP) to the secondary Ethernet port to bridge connections.

The exception to this is the UAP-AC-IW and the UAP-AC-IW-PRO models which do allow PoE Passthrough through one of their secondary ports. You will see them labeled as "PoE OUT" for PoE passthrough and "Data" for only data passthrough.