IPV6 multiple addresses with same prefix

[Steve O'Hara-Smith]

	Hi,

	Does anyone here know of a way to set multiple IPV6 addresses with
the same prefix on an interface so that a jail can have it's own IPV6
address ? When I try it ifconfig happily assigns the second address but it
gets flagged as 'duplicate' and no traffic gets to the jail using /64
or /128 makes no difference, even ping6 fails to get responses.

-- 
Steve O'Hara-Smith <steve at sohara.org>