PAPER Automated Connection of IPv6 Via IPv4 Clouds.pdfVIP

IEICE TRANS. COMMUN., VOL.E89–B, NO.5 MAY 2006 1581 PAPER Automated Connection of IPv6 Via IPv4 Clouds †a) † † †† SooHong PARK , Member, MinHo LEE , YoungKeun KIM , Jordi PALET , and Miguel A. DIAZ††, Nonmembers SUMMARY Tunneling is commonly used in several transition mecha- a boon for the dual stack node that has no access to IPv6 nisms. Some of the mechanisms discover the tunnel endpoint automatically within the local network. This is the main advantage of this by their own means. This paper describes several tunnel discovery mecha- mechanism over the current local network implemented us- nisms for IPv6 traversal beyond IPv4 legacy networks and suggests a new mechanism by which the DHCPv4 server can automatically provide config- ing IPv4. uration information about IPv6-in-IPv4 tunnel. Dual stack nodes attached This paper defines a new mechanism by which the Dy- to IPv4 network can communicate with other IPv6 networks by this mech- namic Host Configuration Protocol version 4 [2] can notify anism beyond IPv4 networks without user intervention. Implementations the client with the list of endpoints of the possible config- have shown that the proposed mechanism can be a convenient and valuable ured tunnels and provide the automatic tunnel discovery for tunnel discovery mechanism in some cases. key words: IPv6, tunneling, IPv6-in-IPv4 tunnel, DHCP