24-10-2014, 02:43 PM
Abstracts: Migrating to IPv6 involves the upgrading of applications, hosts, routers, and DNS to support IPv6, and then converting IPv6/IPv4 nodes to IPv6-only nodes. Because this migration might take years, IPv4/IPv6 nodes must be able to coexist over IPv4 infrastructures such as the Internet and private intranets. To provide automatic configuration and tunneling over the IPv4 Internet, the IPv6 protocol supports 6to4. To provide automatic configuration and tunneling over an IPv4 intranet, the IPv6 protocol supports ISATAP. 6to4 and ISATAP can be used together to provide IPv6 connectivity between hosts in different sites that only have IPv4 infrastructures across the IPv4 Internet.