What should I do if there is a conflict between the IPv6 of the router and the IPv6 of the telecom optical modem?

The ip address conflict of ipv6 is not a joke. The number of ipv6 addresses is huge. Unlike ipv4 addresses, which are limited, the number of ipv6 addresses is an astronomical number. The number is so huge that it can cover every grain of sand on the earth. Assign an ipv6 address. Secondly, the working mechanism of ipv6 has changed greatly from that of ipv4. Even if an ipv6 address is not configured, as long as the port is up, a local link address will be automatically generated for communication on the link, so that the ip address can be obtained using methods such as stateless automatic configuration. , and some products not only obtain an ipv6 address, but can also automatically detect whether there is a conflict in the ipv6 address through the conflict detection mechanism. Once it is detected that someone is using this address on the link, the working mechanism will immediately determine that the ipv6 address is invalid, and other ipv6 addresses will automatically activation. So if you learn the working mechanism of IPv6 on the Internet, this kind of joke will not happen.