IPv6 support for NFSv4 only

[Lukas Hejtmanek]

Hello,

what is the state of art of NFSv4 implementation of the client and the server
to use IPv6 protocol. If I understand correctly, NFSv4 does not need
portmapper (at least on the client) which means that I do not need RPC over
IPv6 if I want to use only NFSv4 protocol (not v3 or v2). Am I correct?

Moreover, Sun clamis that their NFSv4 and pormap in Opensolaris is IPv6 ready.
Do you think that Linux clients could use the Opensolaris NFSv4 server over 
IPv4? And possibly over IPv6? What needs to be done to support IPv6 in the 
latest mainline kernels? What needs to be done on the client side and what on
the server side? Thanks for answers.

-- 
Lukáš Hejtmánek