IPv6 Dual Stack Network

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Unified Communications (UC) is widely deployed in its original IPv4 form. The new dual-stack capabilities will allow the large installed base to transition to IPv6 using a realistic period of coexistence while reducing dependency on IPv4 addresses. This transition can take place at a pace which makes sense for each business. UC allows coexistence of IPv4 and IPv6 within endpoints, gateways and system control servers while maintaining compatibility with other system components and applications.

Discuss the solution options:
1) Rely on NAT or
2) Translation technologies to accomplish interoperability; these are generally not considered viable long-term strategies.
3) Native dual-stack solution where its endpoints, clients and host appliances act as source and sink of IPv6 and IPv4 addresses without the use of 6to4 (RFC 3056), Teredo (RFC 4380), or ISATAP (RFC 5214) tunnels.

The Department of Defense (DoD) Internet Protocol version 6 (IPv6) product certification program began as a mandate native dual stack UC. Review http://en.wikipedia.org/wiki/DoD_IPv6_P ... tification