I apologische beforehand if this is not the correct place or text form to ask this question.
I am trying to configure a part of network with IPv6 using this subnet 2001:DB8:ACAD:CAB0::/64 in cisco packet tracer.
4 parts need IPv6 so i split it into 4 subnets with prefix length /66.
1 of the subnets is used in SLAAC to give a Computer IPv6 configurations.
TThe computer can send packets to the router that is configured with SLAAC but when the packets return NDP gives this message"
The NDP process can not process this prefix 2001:DB8:ACAD:CAB0:: because it's prefix length is not 64 but 66.".
I think that this may be a problem with the latest version of packet tracer I am using because in other networks I made this used to work just fine.
I can fix this by giving the computer a static IPv6 address but I would like to know if other people also have this problem.
cisco packet tracer version : 7.3.1
