Network Prefix Translation or NPT is the equivalent of NAT in IPv6. Let's say you have six WANs (I do in the office) and each has its own IPv6 allocation and B

Network Prefix Translation or NPT is the equivalent of NAT in IPv6. Let's say you have six WANs (I do in the office) and each has its own IPv6 allocation and BGP and a personal allocation is not available. Your client machines don't know what is going on at the border, so they can't "choose" a route out unless you turn the lot into routers and use OSPF or something internally. So NPT. Your router sends flows out over links and rewrites the prefix accordingly for that link. Its a bit horrible and I've decided not to bother yet.