We have good experience in that - how con I help ?
Some notes - NetXDuo lack of any reasonable control loop on connection, we had to implement our own - any add on has a different approch on how to operate and none is built to cross operate - you have to add your thread/task to make all interoperate - basically compute your slaac address, send some ICMPv6 NS, wait for no objections, declare your address as valid, do it for local (0xFE80:: ...), send ICMPv6 RA to get public prefix and repeat with SLAAC address or rely on DHCPv6 or both ...
