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A key element of the survivability cost is the amount of the additional capacity embedded in the network for recovery purposes. Generally, Internet Service Providers (ISPs) have the obvious aim of achieving the required level of survivability with minimum resource consumption and network cost. Therefore, in order to achieve such a challenge, it is necessary to move towards the multilayer differentiated survivability concept. In this paper, the focus is given to the investigation of the application of differentiated survivability concept with pre-allocated restoration technique considering a distributed GMPLS-based IP-over-optical mesh network under single and dual-link failure scenarios.