For the netinstall, tips you can use the regular iso and still enable remote repo, so you can install last updates in the same time, if this was your goal with netinstall.
For the interface, you have to reconfigure your server after the restore and then restart
on EL7/SME10 interface name have changed (e.g. enp5s0 or ens3), so your EL6/SME9 config using eth0 will just fail, hence the need to reconfigure, event if you restore on the very same hardware.