docs/docs/slaac/slaac.md

SLAAC

Configuring your hosts for automatic IP network and address assignment, DNS and routing is very easy.

NetworkManager-based systems

For NetworkManager-based systems do the following. Open up nm-connection-editor and you should have a screen appear like this:

Then double click on the wifi or ethernet connection you have active of which connects you to the same LAN as your router and you should see a window like this popup:

Then go to the IPv6 tab and you should see this:

Now make sure that this part is set to Automatic:

And then for the bottom two parts you can choose whatever option you want in this drop down:

And this drop down:

Once you have configured that, then hit save and close all those windows:

What you want to do now is to open nmtui (in your terminal) and reactivate that connection, first go to Activate a connection:

Now reactivate the connection. You can do this by deactivating it and activating it again (unplugging and replugging won't reactivate it - it doesn't reload the profile).