IPv4-to-IPv6 address translation enables callers in an IPv4 network to place calls to recipients in an IPv6 network. With this capability, the access side of the network can be an IPv4 network and the backbone side of the network can be an IPv6 network and vice versa. The PGC sets up gates so that one termination of the gate has IPv4 addresses and the other termination of the gate has IPv6 addresses. The packet gateway performs the appropriate IPv4-to-IPv6 and IPv6-to-IPv4 translations.
This implementation is not the tunnelling of IPv4 headers over IPv6 headers and vice versa. It is the translation of the IPv4 headers to IPv6 headers and vice versa.
You must configure both an IPv4 NAT pool and an IPv6 NAT pool on the PG for IPv4-to-IPv6 translation to work.
Figure 20 shows an example of a gate pair in a network where IPv4-to-IPv6 address translation is used.
Figure 20: IPv4-to-IPv6 Gates Using Twice NAT
 | Copyright © 2009, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |