High computational systems consisting of multiple processors need interconnection networks to provide communication between them. Torus and Benes networks are highly scalable data center network and found to be the suitable candidates to work in this environment. Fault tolerance and reliability are the crucial issues for any scalable network. This paper analyzes the network reliability of torus and Benes networks of size 8 × 8 and 16 × 16. In this study, we have evaluated the network reliability for both the networks using an accurate analytical method. This analysis is performed for the network of size 8 × 8 and 16 × 16 two-dimensional torus and Benes networks. For this analysis, the confidence levels from 0.99 (high switch reliability) to 0.90 (low switch reliability) have been considered. The overall system reliability has been evaluated considering both node and link failures. The results are validated and compared with existing Benes network using MATLAB. The analysis shows that the reliability of torus network is better than Benes network. This is observed because torus network has more number of alternative paths than Benes network. © 2018, Springer Nature Singapore Pte Ltd.