Hello,
For Congos and CongoJr the recomended IP ranges are 10.101.80.101 to 10.101.80.253 and 10.101.81.101 to 10.101.81.253.
So you could make your Congo be 10.101.80.101 and the Jr 10.101.80.102.
The NCE and GCE buttons in Congo Settings in v 5.0.1 are for access to NCE (Network Configuration Editor) or GCE (Gateway Configuration Editor) if these are installed on the Congo. It is possible to install NCE and GCE (when released) onto the Congo and configure nodes from there. But a laptop with NCE/GCE works just as fine.
For now it's probably easiest to use Net2 protocol and configure the Net3 Gateway with NCE. Once GCE is released and you can configure the Net3 Gateway to be in Net3 mode and use sACN/Net3 as the protocol.
Hope this helps,
Oskar
My two cents:
If you don't want to worry about IPs in the future and this is an isolated network, I would consider enabling the DHCP (Address Service) located in the Network tab. As long as the adapter on the laptop and the future backup console is set up to use DHCP everything will happen automatically for you. Now by default it assigns addresses starting at 10.101.50.101 and goes for 500 addresses. The recommended IP range is well clear of this, so it shouldn't be a problem.
www.etcconnect.com