SDN lacks the reliability  • Especially against large-scale, unexpected link failure • What we did: • Add SDN the resiliency agaist multiple link failure • Through adding SDN switches a self-healing module (CCMM) • Design, Implement, Experiment of CCMM 2  B. Nunes, M. Mendonca, X. Nguyen and K. Obraczka, “A Survey of Software-Defined Networking: Past, Present, and Future of Programmable Networks”, IEEE Communications Surveys & Tutorials, vol. 16, no. 3, pp. 1617–1634, Third quarter, 2014.  B.J. Asten, et al., “Scalability and Resilience of Software-Defined Networking: An Overview,” arXiv:1408.6760v1 [cs.NI], Technical report, Cornell Univ., Aug. 2014.