as far as I can tell, this is intended behavior, as otherwise you would have a router uplinked to a non-external network, which wouldn't make any sense. If you delete the router gateways that connect to this external network, you should then be able to change it back to an non-external net.
as far as I can tell, this is intended behavior, as otherwise you would have a router uplinked to a non-external network, which wouldn't make any sense. If you delete the router gateways that connect to this external network, you should then be able to change it back to an non-external net.