The CCNA Basic: IPv6 transition options

CCNA 200-301

CCNP Enterprise

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CCIE DC Lab

2019-12-31

IPv4 and IPv6 networks are not interoperable, and the number of devices using IPv4 numbers remains large. Some of these devices do not support IPv6 at all, so the migration process is required because IPv4 and IPv6 may coexist for some time.

Many transition mechanisms have been proposing.

1. IPv4/IPv6 Dual Stacks –Each device on the network is configured with IPv4 and IPv6 addresses. When two devices are to communicate, they first agree to which IP version to use.

2. NAT64 – Create a mapping between two address types. such as by mapping multiple IPv6 addresses to one IPv4 address.

3. Tunneling – Pv4 packets are tunneled through the IPv6 infrastructure and vice versa.

NOTE

Some methods of IPv4-IPV6 transition have been abandoned, but are still mentioned in the old book. Some of these methods are NAT-PT and NAPT-PT.

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