Never mind guys false alarm, figured out that it is not router but possibly something to do with an ONT. Thank you for explanation.

@Ivaylo mine is off definitely, howerver my iPv6 Lan have Assigned type (4 choices): ND poxy, DHCPv6, SLAAC+stateless DHCP (which have a radio button active next to it), SLAAC+RDNSS. can you briefly...

I have the Archer AX10(US)_V1.2_201230 The latest firmware. I am ONLY using IPV4 internet and do not really use IPV6. The router interface show that the router itself has an IPV6 address I have a...