Format csv file with headings & data:
Name, Description, Type, MAC, IP, NAT IP, IPv6, Network, VLANs
An export opens straight back in. VLANs may be left off. IP is an address, DHCP or empty; Network is the network's name or subnet. Rows with an address outside their network, or a MAC that is not one, are skipped and listed; names the asset has already are skipped.