Abstract: The present research deals with the study of one of the transition mechanisms from IPv4-IPv6 to determine the performance of the network with respect to the most important parameters such as delay and loss of packets over different bandwidths and storage buffer. Although, the process of migrating to native IPv6 has not been very fast, the study checks for improvements in IPv6 performance compared to IPv4. Results are presented on a pilot network using traffic measurements on the transport protocol in an empirical way.