Hi,
i recently ran into a problem with OSPFv3 over an IPIPv6 tunnel, as the 'tiks on both ends assign themselves the same LL address (fe80::fcfd:ff:fe00:0/64) and OSPF (or ipv6 in general) doesn't like duplicate addresses. The same config was running fine on ROSv6 and is still running fine, if the other end of the ipipv6 tunnel is a non 'tik.
Is there a way to change the LL address on the IPIPv6 tunnel interface? Or rather, why are both 'tiks using the same LL in the first place?
best