Hello,
Is there a way to import existing IP assignments say from an excel spreadhseet or .csv file into the OpenNetAdmin DB so that we don't have to manually populate the information?

Thanks,
Jason

You will want to get the DCM command line tool. Here is a previous post that is a good start at what can be done:
http://opennetadmin.com/forum/viewtopic.php?f=4&t=5

Also ONA has a built in nmap based audit tool to help populate information. Information is here: