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Techpaper Migration

Status quo and future of migration from IPv4 to IPv6


In the following you can find an overview about the migration process of IPv6. For more detailed information please see our tech paper on migration.


Status quo: Dual stack and native IPv6/DS-Lite

Dual stack
Today providers operate IPv4 and IPv6 enabled networks and their end customers receive either both an IPv4 and an IPv6 address, or they will receive an IPv6 prefix. No tunnel mechanism is required. This scenario is known as dual stack and is already carried out by many providers.

Native IPv6/DS-Lite

There are also providers who give their customers IPv6 addresses only. Access to the Internet can be realized via DS-Lite (Dual Stack Lite), for instance. In this case, IPv4 packets are tunneled via IPv6 to a Carrier Grade NAT (CGN) gateway and are then sent to IPv4 target addresses in the Internet. This scenario is necessary as long as there are end devices which solely use IPv4. As an alternative to DS-Lite one can use NAT64/DNS64 in mobile radio communication.

6in4 Tunnel
The tunnel technique 6in4 should be used if your provider does not offer IPv6 yet.6in4 packages IPv6 packets into IPv4 packets (protocol type 41). However, the tunnel endpoints have to be configured manually.