scope:

This Recommendation describes the IPv6 transition technologies which could be applied in a next generation network (NGN) environment. The signalling requirements supporting NGN real-time multimedia services in Internet Protocol version 4 (IPv4) and Internet Protocol version 6 (IPv6) mixed network are specified. Three mechanisms for IPv6 transition are described in this Recommendation including dual stack, translation and tunnelling. The security issues introduced by IPv6 transition is out of scope of this Recommendation.