IPv6

IPv6

IPv6 NAT

Why IPv6 NAT

Load Balancing

Multi-homing (Uplink Balance, Failover)

NAT is demanded by enterprises for multi-homing.
Multi-homing is a situation that describes a single computer host that makes use of several IP addresses associated with various connected networks. Within this scenario, the multihomed computer host is physically linked to a variety of data connections or ports. These connections or ports may all be associated with the same network or with a variety of different networks. Depending on the exact configuration, multi-homing may allow a computer host to function as an IP router.

Dynamic IPv6 prefixes

Implementations

NF NAT66 (1:1, N:1): NAT66:A first implementation

    http://sourceforge.net/projects/nfnat66/

MAP66 (1:1):

    http://sourceforge.net/projects/map66/

RAWNAT (Xtables Addons): 

Standard

RFC6296 - IPv6-to-IPv6 Network Prefix Translation, NPTv6

Reference:
Multi-homing: http://www.wisegeek.com/what-is-multi-homing.htm