Ports option support in dual stack transition mechanism (DSTM)

The Dual IP Layer Stack Transition Mechanism (DSTM)(1) is based on the use of IPv4-over-IPv6 tunnels to carry IPv4 traffic within an IPv6 dominant network and provides a method to allocate a temporary IPv4 address to Dual IP Layer IPv6/IPv4 capable nodes. As an extension to the address allocation process for DSTM, this paper proposes the ports option for DSTM. A DSTM server may also provide a range of port numbers to be used by the client. This would allow the use of the same IPv4 address by several DSTM nodes at the same time, reducing the size of the required IPv4 address pool.