Reconnect between router and client needed for global stateful DHCPv6 assignment.

[V10lator]

I have a cherry-picked IPv6 address from my sixxs subnet that I want to delegate to a client. For that to work I simply added a host configuration with hostid and duid to /etc/config/dhcp.

Now after a reboot of the router I get the ULA with the hostid but not the global IP. I need to disconnect the client (either with ifconfig down or by pulling out the LAN cable) an reconnect before odhcpd assigns the IP to the client.

More information: https://forum.openwrt.org/viewtopic.php?id=63635

[V10lator]

For debugging purposes I disabled stateless IPv6 on the client and loocked at the logs while the router bootet. Here it is: http://pastie.org/pastes/10772042/text

I think the important parts are these:

Mär 24 09:30:20 horst NetworkManager[662]: address 2001:[CENSORED]::bad:a55 Mär 24 09:30:20 horst NetworkManager[662]: address fd50:db2f:f4ff::bad:a55 Mär 24 09:30:26 horst kernel: r8169 0000:0a:00.0 enp10s0: link down Mär 24 09:30:28 horst kernel: r8169 0000:0a:00.0 enp10s0: link up Mär 24 09:30:28 horst NetworkManager[662]: (enp10s0): DHCPv6 lease renewal requested Mär 24 09:30:34 horst NetworkManager[662]: address fd50:db2f:f4ff::bad:a55

So first everything is golden, then for some reason the link disconnects for a split second and it fails to renew the 2001 address. I think I tracked this down pretty good but if you have any more ideas what I could test please tell me (yes, I'm willing to patch and compile odhcpd on my end).