As the growth rate of the Internet has reached a very high level and heavy multimedia application such as video and audio streaming is used, Qos (Quality of Service) technology has become more relevant and important. IPV6 (next generation Internet Protocol) has more functionality and features than IPV4, such as providing more address space and new fields that can be used to improve and make the use of IP network more frequent even with the sensitive traffic flow. The currently used IPv4, which has supported the Internet for more than 20 years, has many problems, for example, no QOS has been implemented, so many other protocols are used to ensure the demand for sensitive traffic flow. The next generation Internet protocol IPV6 has implemented two fields that can be used as a tool to support QOS. These fields are the 20-bit flow label identification field and an 8-bit Traffic Class (TC) field. The flow label field is used by a source to label a sequence of packets for which it requires special handling by IPV6 routers, the traffic class field is used to show the priority level of the traffic flow. In this article we will discuss and analyze IPV6 based End-to-End QOS methodology on different parameters like end-to-end delay, packet loss and throughput delay using simulation performed with Network SimulatorKeywords: IPV6, QOS, Label flow, traffic class.1-Introduction The current version of IP (IPV4), active since 1980, has supported the rapid growth of the Internet from the beginning. The implementation of IPV4 is proven to be simple and interoperable. But the growth rate of the Internet has reached a very high level compared to its minimum level, which creates many problems such as running out of address space, configuration pro... half of the paper... ng, Osijek, Croatia 2005[6] Joan Ruiz, Àlex Vallejo, Jaume Abella “IPV6 Conformance and Interoperability Testing” 2005[7] Stefano M.Faccin and Franck Le “A secure and efficient solution to an IPV6 address ownership problem.” 2002[8] Cynthia E. Martin SI International Reston, VA and Jeffrey H. Dunn Netstar-1, Inc. Rockville, MD “Internet Protocol Version 6 (ipv6) Protocol Security Evaluation” 2007[9] Eric carmes Eric.carnes @rwinh .com “The transition to IPV6” ,[10] James.F kourose, keith.k Rose “Computer networks. "[11] M. Crocker, G. Lazarou, J. Picone and J. Baca Intelligent Electronic Systems Center for Advanced Vehicular Systems Mississippi State University {crocker, glaz, picone, baca}@cavs.msstate.edu "Estimates of the width of Improved bandwidth using the IPV Hop-by-Hop Extension header6”