Hello,
I’m pretty new to IPv6 and to be honest I’m still unfamiliar with networking overall. Still, it’d be nice if you tried to help me. 
Let’s say I’m connected to the internet via my cable modem, next in line is my dedicated RouterOS x86 v6.10 box and then there’s another router. Neither IPv4 nor IPv6 addresses are static. So for IPv4 I did this:
- DHCP client on the cable modem<->RouterOS connection
- static IPv4 10.11.12.1/24 on the RouterOS<->other router connection
- srcnat masquerading rule without any restrictions
- default route (0.0.0.0/0) on cable modem<->RouterOS connection
This works fine!
But I’ve no idea how to do the same for IPv6. I thought about using the dhcp-relay for IPv6 that has been introduced with RouterOS 6.0rc13, but I have no idea what to set the dhcp-server address to. My ISP hasn’t provided me with an address for that. Is there another way?
Obviously kicking the second router out of this topology and using RouterOS for everything would make this much simpler, but unfortunately for me that’s not an option.
Thanks in advance