I finished my AD review for five softwire documents that I believe are closely
related, and last-called them as a group so that interested parties could
review them that way. These documents all solve largely the same problem, but
in usefully (IMHO) different ways from an operational perspective.
If you intend to read all five documents and aren't currently very familiar
with how this technology works, I would suggest reading the lw4over6 document
first, the map-dhcp document second, the map document third, the map-t document
fourth, and the 4rd document fifth. This is just my personal opinion on how
best to bootstrap your understanding, and shouldn't be taken to mean that I
prefer one document to another.