This OID, typed as CucsFabricNFTransport, reports the network transport protocol that NetFlow exporter uses to deliver flow records to its exporter destination. An admin needs this value to confirm the NetFlow collector on the other end is listening on the matching protocol, since a mismatch here silently drops all exported flow data. If the collector team reports receiving no NetFlow traffic, checking this OID confirms whether the fabric interconnect is even sending on the protocol the collector expects.