Abstract:The production of IPv4 has ceased its supply and this has created a global phenomenon that is faced by Internet providers and users around the world. This means that IPv6 implementation phase has begun and IPv4 duties will be taken over by the IPv6 protocol. Technically, IPv4 and IPv6 cannot communicate directly due to the difference of architecture. IPv6 transition mechanism is used as a medium to allow both protocols to communicate and exist together on the same network. This study is performed to examine and investigate the performance of the 6to4 and Dual Stack transition mechanism based on performance metrics like throughput, jitter and end-to-end delay when implemented on UKMNet network. The test infrastructure is built on the UKMNet network and the test was conducted using the testbed approached. The final result found that the 6to4 mechanism is more reliable and easy to implement on UKMNet environment compared to dual stack mechanism.