DHCPV6 client/server netmask, default route

Hi, I have a Centos6 ISC 4.1.1 dhcpv6 server. The client is ubuntu lucid with both dibbler-dhcpv6 and wide-dhcpv6 clients installed. The primary issue I am trying to solve is to get the dhcpv6 client learn the correct netmask when it gets the IP address from the dhcpv6 server. I can get the dhcpv6 client to assign the server-supplied ipv6 address, but the netmask is fixed at /64 no matter how the server configuration file is. The client's output: 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000 inet6 fd1e:9b0f:2212:3028:223:9cff:fe26:f702/64 scope global valid_lft forever preferred_lft forever inet6 fe80::c4b0:a8ff:fee8:3a44/64 scope link valid_lft forever preferred_lft forever Server config: authoritative; update-static-leases off; subnet6 fd1e:9b0f:2212:3028:223:9cff:fe00:0000/104 { range6 fd1e:9b0f:2212:3028:223:9cff:fe26:f702 fd1e:9b0f:2212:3028:223:9cff:fe26:f702; preferred-lifetime 36000; } I wish the client to know the netmask is /104, which is not happening with dibbler-client. Is there any option I am missing? Any config error? I even tried to get wide-dhcpv6 client -- but my ISC DHCPv6 server doesn't seem to be replying to dhcp solicit messages from wide-dhcpv6 client. While the same server replies just fine to dibbler-client (which then ends up with the netmask issue). Any pointers? Any comments? Thanks in advance!

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