Nowadays, the requirement of Internet is increasing in more heterogeneous scenarios; especially in mobile platforms, such as Planes, trains and buses. NEMOWG (NEtwork Mobility Workging Group) a new working group in IETF (Internet Engineering Task Force) is formed to provide mechanisms to manage the mobility of a network as a whole, enabling that network to change its point of attachment to an IP-based fixed infrastructure without disturbing the ongoing communications or sessions. This article describes the IPv6 Network Mobility (NEMO) basic support protocol, analysis its limitation and suggesting a route optimization technique for nested network mobility. © 2009 IEEE.