| As part of Army’s IPv6 transition initiative there are several deployment issues that need to be solved. These include transition at several layers of the protocol stack. Army has a suite of legacy application that currently work on IPv4 systems. Before Army moves to an all IPv6 network, it will need to go through a period of transition where both IPv4 and IPv6 networks, applications will need to co-exist and interoperate. While the IETF has proposed several ways the transition can take place, we have focused our effort on application transition. As part of this effort we have chosen Army’s heavily used legacy application such as MCS-L and have applied several transition technologies. We have taken advantage of Telcordia’s Dynamic Slicing Tool in studying the MCS-L code and make appropriate changes to make it IPv6 compatible. Several transition technologies such as dual stacking, Application Layer Gateway (ALG), Tunnel Broker and NAT-PT have been experimented with MCS-L application. Both multicast and unicast mode of communication associated with MCS-L have been tried. |