VCS documentation clearly states that IPV 6 is not supported
Read the Release notes and Bundeled Agents Guide

Micky Willkom wrote:
> I have a Sun Solaris 8 server with VCS 4.1, and I have found a problem with
> the IP offline script. The IPv6 device/address has to be listed after an
> IPv4 device in the output of an "ifconfig -a" command. Then the IP offline
> script will unplumb the primary network device instead of the virtual device.
> The way to test is (assume hme0 is the network device for the sun server)
>
> ifconfig hme0 inet6 unplumb
> ifconfig hme0 inet6 plumb
> ifconfig hme0 inet6 up
> ifconfig -a **** you should now see IPv6 hme0 last in the
> list ***
> hagrp -switch -to
> In the process of failing over the application, the IP offline script will
> unplumb hme0 vs. hme0:1.