Issues of computer network survivability have gained much attention in recent years since computer networks plays an important role in modern world. Many organizations, institutions, companies use computer networks as a basic tool for transmitting many kinds of information. Service disruptions in modern networks are expected to be significant because loss of services and traffic in high-speed fiber systems could cause a lot of damages including economic loses, political conflicts, human health problems. In this paper we focus on problems of survivable connection oriented network design. A new objective function LF for primary routes assignment the local-destination rerouting strategy is defined. Next, an optimization problem of primary routes assignment using the LF function is formulated. Moreover, a branch and bound algorithm for that problem is proposed. The theory and experimental results demonstrate the ability to apply the LF function to dynamic and static design of survivable connection oriented networks.

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