6in4
| IPv6 transition mechanisms | |
|---|---|
| 4in6 | Tunneling from IPv4 to IPv6 |
| 6in4 | Tunneling from IPv6 to IPv4 |
| 6over4 | Transport of IPv6 data packets between dual-stack nodes over an IPv4 network |
| 6to4 | Transport of IPv6 data packets over an IPv4 network (obsolete) |
| AYIYA | Anything In Anything |
| Dual stack | Network nodes with IPv4 and IPv6 in parallel operation |
| Dual-Stack Lite (DS-Lite) | Like dual stack, but with global IPv6 and carrier NAT IPv4 |
| 6rd | IPv6 rapid deployment |
| ISATAP | Intra-Site Automatic Tunnel Addressing Protocol (deprecated) |
| Teredo | Encapsulation of IPv6 packets in IPv4 UDP -Datenpaketen |
| NAT64 | Translation of IPv4 addresses into IPv6 addresses |
| 464XLAT | Translation from IPv4 to IPv6 to IPv4 addresses |
| SIIT | Stateless IP / ICMP translation |
6in4 (tunneling from IPv6 to IPv4) is an IPv6 transition mechanism for the transmission of IPv6 data packets between IPv6 nodes connected via an IPv4 network.
functionality
With 6in4, the data traffic is packed into IPv4 data packets, the protocol number of which has the decimal value 41 in the IP header . The transported IPv6 data packet follows the IPv4 header directly. The IPv4 header only increases the data packet by 20 bytes. With a Maximum Transmission Unit (MTU) of 1500 bytes, as is the case with standard Ethernet connections, IPv6 frames with 1480 bytes can be transported without fragmentation . Like all proto-41 tunnels, 6in4 tunnels are static, i.e. the end points are configured statically.
literature
Specifications
- RFC 4213 , Basic Transition Mechanisms for IPv6 Hosts and Routers