@user01345234 Problem solved, had to update the router.

@Clive_A Yes, my ISP is digi. ro (RCS & RDS), and they provide me with a PPPoE IPv6. Sometimes it works, but when I check on IPv6 test websites, it doesn't show my IPv6 address. There might be an...

What have I done wrong? I'm trying to get an IPv6 address. On another TP-link router is working. I'm am going to provide any information that will help you to understand my problem. Ignore the...