>what is syntax, to set default gw (gw is IPv6), for ipv4 - route add default x.x.x.x,
>but for IPv6 ?

	if you are a host (not a router), you want to autoconfigure by
	listening to router advertisements from your adjacent router.
	http://www.netbsd.org/Documentation/network/ipv6/#setup_host
	http://www.netbsd.org/Documentation/network/ipv6/#autoconfig

	if you are a router, you want to exchange routes by running route6d(8)
	or pkgsrc/net/zebra.

	if you really really need to set a static route,
	# route add -inet6 default <linklocal address of gateway>
		never use global address as gateway.
	or, if you are setting route to p2p interface,
	# route add -inet6 default ::1
	# route change -inet6 default ::1 -ifp <name of interface>

itojun