The present disclosure provides a method and a system for managing radio unit or Open-Radio Unit (O-RU) (116) failure. The method manages the O-RU failure through a plurality of NETCONF (Network Configuration Protocol) clients by a management-plane (M-Plane) in an open radio access network (100). The method includes establishing the M-Plane between the O-RU and the plurality of NETCONF clients available with each of an Open-Distributed Unit (O-DU) (114) and a Service Management and Orchestration (SMO) framework (102) and detecting failure by the plurality of NETCONF clients in the connection between the O-RU and the plurality of NETCONF clients within a session at a predefined time duration. Lastly, the method includes switching the connection from a hybrid model to a hierarchical model in case of the failure with the hybrid model, whereby switching the connection ensures returning to the hybrid model without reset when the SMO framework connection is back.