With the increasing number of mobile users, the network traffic for tracking mobile hosts is expected to increase dramatically, thus an efficient protocol for IP mobility support is of great value. In this paper we study the performance of such protocols. Starting from identifying the shortcomings in current evaluation methods and presenting the unfitness to our topic in current network simulators, we make three major contributions in this paper: 1) we present an integrated development environment we have developed and utilized for protocol evaluation; 2) we show the simulation results of two benchmark protocols with our simulation environment, and we give our analysis to the results; 3) Based on the analysis, we propose a new protocol and demonstrate its efficiency through the comparison with the two benchmarks.