Maybe I did not catch your words. Why should only one solution("at most one
solution") be standarded in the v6tc? I think the goal is to solve the
existing problems. Of course redundant mechanisms should be avoided.
However, is there possible to summarize an "omnipotent" solution? Why we
should guarantee such a limitation before beginning the work.
In addition, when I go through the justification for the IPv6 Tunnel
Configuration work, I find that there is already one and only one proposal
that could meet all the identified requirements. The sole survival is STEP.
I hope it is just a coincidence, or it can answer the question mentioned in
the 1st paragraph.
Best Wishes,
Guo, Lenny