I want to set up a DHCP server on my local network for IPv6 that issues addresses and further information like DNS/NTP and so on. From my ISP I got the IPv6 Prefix which I will refer to as <prefix> in further snippets.
I use the isc-dhcp-server. Under /etc/dhcpd.conf I have
option dhcp6.name-servers <prefix>::2;
option dhcp6.info-refresh-time 21600;
subnet6 <prefix>::/64 {
range6 <prefix>::1 2<prefix>::ffff:ffff;
}
The eth0 interface (which is connected to the router) is configured statically in the /etc/networking/interfaces file:
iface eth0 inet6 static
address <prefix>::2
netmask 64
The client has Ubuntu 14.04 LTS with network-manager and is bound to the router via the wlan0 interface (router acts as access point). Under the GUI configuration of the Ubuntu network-manager from the IPv6 tab I choose "Method: automatically, only DHCP" (so I expect stateful DHCPv6 configuration of the client - it should get an ipv6-address out of the above defined range).
However, that does not happen. ifconfig implies, that the client was configured using the stateless method (the configured ipv6 address has the clients wlan0 HW-Address encoded)
I suspect the routers has the wrong advertising flags set. But I can't configure the router as it is provided by the ISP. What can I do? Are there any suggestions?