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This paper presents the performance of a proposed QoS provisioning scheme - the Classified Cloning Scheme - when incoming traffic to the OBS network is self-similar. Intensive simulations were conducted using ns-2, after developing new modules for evaluation purposes. The self-similarity of the incoming traffic is depicted via cumulative distribution functions of the inter-arrival time for incoming IP packets under different load scenarios. Results show that the proposed scheme outperforms both standard OBS and the basic cloning scheme, while minimizing delay and jitter. The loss rate improvement over basic cloning and standard OBS is over 60% and 75% respectively. Moreover, the increased load due to classified cloning is considerably lower than that of basic cloning.