Running rtadvd or DHCPv6 server via if_bridge interface

[Bruce Cran]

I have a router configured using if_bridge with a 4-port NIC that's
serving addresses over DHCP. I'd like to add in either rtadvd or
DHCPv6, but neither work because the bridge interface doesn't have an
IPv6 link-local address. Is there a way around this, or is it not
possible to serve IPv6 addresses over if_bridge interfaces?

-- 
Bruce Cran