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What's your Ubuntu question? Be specific

I did have everything working, but when I updated my router to a supported version of ubuntu, it broke (Ubuntu 14.4)

Where things go wrong is dhclient never grabs a /64. It either gabs the IP for my external interface or it tries to gab the /64 on the internal interface.

I think the problem is in /etc/dhcp/dhclient6.conf

interface "eth2" {
send dhcp6.ia-pd 1;
script "/etc/dhclient-exit-hooks";

eth2 is my external interface, I have my exit hooks set to config eth0. I do have NetworkManager mange set to true

If I run

dhclient -6 -P eth2

it gives me my prefix, but it doesn't add the address to eth0