Er, with my flow label hat on, I don't think that is OK at all. Shim6 has no particular right to take over the Flow Label, any more than 6LSA does.
Brian
The point I'd like to make (and about which we should agree) is that it is hard or impossible to keep full/real RFC 3697 compliance and shim6 goal support, so if we decide to follow the flow label way the best is to obsolete the RFC 3697 and to reserve the 20 bit field currently named flow label to shim6 usage.
Regards
Francis.Dupont@enst-bretagne.fr