portTrunkIndex — Multiple manufacturers; see the original MIB MIB copies (LibreNMS/Observium Community), Edgecore official enterprise switch MIBs, Edgecore MIB copies (Observium Community)
The trunk to which this port belongs. A value of 0 means that this port does not belong to any trunk. A value greater than zero means that this port belongs to a trunk in the trunkIndex, defined by the corresponding trunkPorts.