IPv6. the successor of current IP (IPv4). is now under development. Mobility support is one of the requirements for IPv6. This paper proposes a protocol for mobility support in IPv6. The pro- posed protocol is based on the mechanisms of Vir- tual Internet Protocol (VIP). which provides mo- bility in IPv4. Two Hop-by-Hop options are added to support mobility. one for user data and another for control. The proposed protocol provides rout- ing optimization and authentication mechanisms as well as seamless mobility. This paper also pro- poses an extension of the state transition diagram of TCP for quick resumption of TCP communi- cation when a mobile node reconnects to the net- work.