With the rapid growth in the number of mobile subscribers and mobile devices, the demand high-speed Internet access is becoming a primary concern in our lives. Not long ago, the most stable and well known solution of IP-based mobility management is Mobile IPv6 (MIPv6). Even if MIPv6 is a well-known mature standard for IPv6 mobility management support, however, it has revealed some problems such as handover latency, packet loss, and signaling overhead. Thus, a new IPv6 mobility management protocol called Proxy Mobile IPv6 (PMIPv6) is being actively standardized by the IETF NETLMM Working Group. Unlike the various hostbased protocols such as MIPv6, a network-based approach such as PMIPv6 has salient features and is expected to expedite the real deployment of IP-based mobility management. In this paper, we present an experimental evaluation of MIPv6 and PMIPv6, and give qualitative and quantitative analysis which highlights the main desirable features and key strengths of PMIPv6.