John -
I completely agree that IPAM is helpful for non-DHCP subnets.
Whether to use IPAM or a spreadsheet for non-scannable DMZ subnets I don't really see a compelling argument for one versus the other, other than to be consistent as to where the data is being stored.
Using InfoBlox/NetMRI is a possiblity but that's another product that would have to be purchased in order to get that full functionality. Orion IPAM is already in the door while NetMRI is not.
The functionality I would like to see is for Orion IPAM to be able to query the InfoBlox appliances, just as it can for Microsoft or Cisco DHCP servers, for retrieval of the info contained therein. This would allow our numerous Orion logins, which are validated via AD, to retrieve various info. Our InfoBlox logins are not authenticated via AD and we have no desire to do so nor do we wish to grant login to as wide an audience.
