NAT64 provides a way to transition to IPv6 while you
still need to communicate with IPv4 networks. When you need to communicate
from an IPv6-only network to an IPv4 network, you use NAT64 to translate
source and destination addresses from IPv6 to IPv4 and vice versa.
NAT64 allows IPv6 clients to access IPv4 servers and allows IPv4
clients to access IPv6 servers. You should understand
NAT before
configuring NAT64.