This work presents the research and comparative analysis of flow-based models for Fast ReRouting proposed for use in softwarized networks. A linear optimization model was chosen among the existing promising flow-based models used in conjunction with link and node protection schemes. Numerical studies were carried out on the structure of the network core fragment selected for the study . The results proved the model's efficiency and confirmed its prospects for use in calculating primary and backup routes by programmable network controllers. The research also made it possible to formulate recommendations for the further development of the approach used to implement Traffic Engineering and advanced protection schemes under Quality of Service guarantees over the primary and backup routes.