I've just encountered this issue with unraid 7.1.4, rebooting router means I get new ipv4 and ipv6 addresses, although on unraid I have fixed ipv4 the ipv6 address is given by the router, I ignored the issue overnight to see if it would correct its self but it did not. I tried: ip -6 addr flush dev br0
ifconfig br0 inet6 0but ifconfig did not work, so i was forced to use: nohup bash -c "ifconfig br0 down && ifconfig br0 up" &It would be nice if unraid could periodically renew the ipv6 lease when in this configuration to ensure is it updated after router restart