This Recommendation specifies protocols for interfaces on a quantum key distribution network (QKDN) manager in quantum key distribution networks (QKDNs). Reference points on a QKDN manager are defined in [ITU-T Y.3802] which are Mq, Mqrp, Mops, Mk, Mc, Mu and Mx. A QKDN manager performs FCAPS functions through these interfaces to QKD modules, KMs, QKDN controllers, QKD links, user network managers and corresponding QKDN managers. Also, Mxi reference point for interworking of QKDN management layers is defined in [ITU-T Y3810] for sharing QKDN management information between QKDN providers through the QKDN management layer.