pfSense

• WAN interfaces are configured as WAN_KD and WAN_DTAG, the first is getting its configuration from a Fritz!Box, the second is directly configured to dial in via DSL-Modem.
  • Both WAN interfaces do get IPv4 and IPv6 configuration correctly, traffic is going via both interfaces
  • Internal interfaces called LAN_ and all interfaces are set to track their corresponding WAN_ interface, so some are connected with WAN_KD while the others are connected with WAN_DTAG.
    • In the attached file, you can see that only for WAN_KD the corresponding interfaces did get the IPv6 addresses.

This configuration works from time to time perfect
Hence I believe that it is done right. I have no idea why and under which circumstances. Most other times, the track interface functionality works only for one WAN and doesn't for the other. A reboot or something like this doesn't make a difference - the result is the same: see the attached file. Also, even if it worked in the beginning, after a while the track interface for one or the other WAN does stop working and the corresponding interfaces loose their IPv6 configuration.

If you need specific information, configuration insights, log-file data (and which) let me know, I am happy to contribute.

If I am just to stupid to configure pfSense, I am happy to learn as well ;)