If you happen to have the Workbench Pro tool you could use that to commission the LON equipment, instead of using the LN builder. I don't know how the NAE gets setup, but the subnet and node of the Trane equipment I have set with the Tridium tools. I did find it a PIA to sort out which set of data (SCC or DAC) was the proper set. Of course that was my first exposure to LON.
Im bumping this post because im going to be working on an NAE with a lon trunk. I also have FX Workbench, can I use workbench to set up the trunk instead of LN Builder?