A method to allow a more efficient routing in Network Mobility by means of a mobile router deciding on a more efficient route to be taken as it roams between networks comprising the steps of starting a delay counter when the mobile router performed a handoff from one network to another network, deciding whether performing a Route Optimization is necessary based on the delay counter, stripping of a parent subnet from a new Care-of-Address, comparing the parent subnet with home subnet, deciding whether the mobile router is performing a micromobility or macromobility, deciding whether the mobile router is roaming in its parent network or in/between foreign networks and selecting an appropriate Route Optimization method based on type of mobility performed.