Some problems experienced
In case of using iPv4+iPv6 Dual, if a device is accessing a server via iPv6, the rate restriction assigned to that special device from the device list
not working, the using the last speed in the package.
When we buy a static iPv4, the modem does not output to the internet with iPv6 but Fritzbox provides smooth output.
If we turn on ipv6 remote access under the Domain tab, the webdav server is not accessed.
The features that are missing in the interface part are
No iPv6 DNS entry in interface
No iPv6 DHCP Server in Interface
No iPv6 Tracert in Diagnostic Tab