Mobile IPv6 supports host mobility by dynamically changing IP addresses while mobile nodes roaming in the Internet. However, there still exist performance problems during handoffs, such as handoff latency, packet loss. When a mobile node increases its mobility, performance degradation induced by frequent handoffs grows drastically. In this thesis, we propose a dual-tunnel with buffering (DTWB) mechanism to reduce packet loss ratio during multiple handoffs. Packet buffering at access routers is initiated by mobile nodes when the received signal strength goes below a predefined threshold. The buffered packets are forwarded through dual tunnels, of which the first tunnel is established between the old access router and the new access router, and the second tunnel is established between the new access router and the mobile nodes. For the purpose of evaluation, we perform experiments on NS-2 simulation. The simulation results demonstrate that our proposed mechanism can minimize the packet loss ratio and increase the throughput during multiple handoffs.