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Reconfigurable optical add/drop multiplexers (ROADMs), which enable dynamic and flexible node-to-node connection via wavelength paths, are key components in metro ring network nodes. A data-granularity-flexible ROADM node that combines a wavelength-tunable filter, and an optical packet ADM (PADM) has been proposed and demonstrated. In this paper, the first field trial of the data-granularity-flexible ROADM network with wavelength- and packet-selective switch is demonstrated using a novel concurrent generation technique of address-reconfigurable optical-code (OC) labels and payload data. Bit error rates (BERs) of less than 10-12 for all 16-wavelength channels are obtained over 90 km of transmission at 10 Gb/s.