ip address x.x.x.x 255.255.255.252
ipv6 address 2607:F118:x:x::/64 eui-64
ipv6 nd suppress-ra
ipv6 ospf 1 area 0.0.0.0
I've found that this setup, in conjunction with iBGP peering between
loopback /128's works well.
When OSPFv3 goes down and you are trying to debug, what IPv6 will you
ping to check if the second side is accessible?