<p>An edge node(22)accommodating an IPv6 host(11)holds service information about the IPv6 host(11)received from an AAA server(1)and the host address information about the IPv6 host(11).An edge node(21)accommodating an IPv6 host(12)holds the host address information about the IPv6 host(12).The edge node(22)acquires the host address information about the IPv6(12)from the edge node(21)when communication from the IPv6 host(11)to the IPv6 host(12)is started.The edge node(22)makes the service information effective by using the host address information about the IPv6 hosts(11,12)and provides the corresponding service.</p>