Disclaimer: by no means I’m an IPv6 expert and I’m not going to teach on different IPv6 configuration options and basics. In this post, I will focus solely on a specific subject.

As a part of my IPv6 learning path I played with stateful DHCPv6 and spent all weekends to sort one interesting. Here is my simple network setup:

basically, two private networks connected to a router.

1. UDM Pro router
2. L2 switch
3. DHCPv6 stateful server
4. DHCPv6 client
5. IPv6 network: fd00:0:0:4::/64

The problem: clients receive IPv6 address from DHCPv6 and cannot communicate in same network using LUA (fd00) addresses.