Investigation found that DAD timeout for IPv6 seems to be not implemented for network manager [1]. And only support up to IPv4. It looks like a limitation but couldn't find any writing confirmation for this limitation.
[1] https://developer.gnome.org/NetworkManager/stable/settings-ipv6.html
Investigation found that DAD timeout for IPv6 seems to be not implemented for network manager [1]. And only support up to IPv4. It looks like a limitation but couldn't find any writing confirmation for this limitation.
[1] https:/ /developer. gnome.org/ NetworkManager/ stable/ settings- ipv6.html