Transition Mechanisms
Overview of Transition Mechanisms

IPv4 to IPv6 changeover is not a sudden process. Therefore, there must exist transition mechanisms that allow the simultaneous operation of both protocols. There are lots of proposals enabling mutual cooperation between these two protocols. These proposals can be divided into three groups:

The following table is presenting short list of transition mechanisms. The table contains the RFC documents where the individual mechanisms are described in more detail.

The List of Transition Mechanisms

Tunneling

Translators

tunnel server/broker

RFC 3053

SIIT

RFC 6145

6to4

RFC 3056

NAT64

RFC 6146

6rd

RFC 5569

TRT

RFC 3142

6over4

RFC 2529

BIH

draft

ISATAP

RFC 5214

SOCKS64

RFC 3089

Teredo

RFC 4380

Dual-Stack Lite

RFC 6333

The general principles of tunneling and translating are only described in the following sections.