I' m interested in monitoring traffic usage per client connected to my mikrotik. The thing is that my ISP provides me with dual stack ipv4/ipv6. With ipv4 i could just monitor traffic with simples queues just by adding their local ip address. With ipv6 though it's hard to do the same, as most modern OSes use random ipv6 address for extra security and these addresses change usually every day. I tried marking packets depending on every client's mac address but with no success. Any ideas?