Yes...
We were able to do this at two of my previous engagements. The trick is to build the proper SNMP Classifier and hope that your devices have a properly identifiable OID value. I suggest getting a proper SNMP community string and executing discovery against one IP address you know for a fact is one of your devices. Then, take a look the discovery data returned in the Classification stage (should be an error as you probably do not have the SNMP OID classifier built). Parse out the XML payload and look for your unique identifiers for the device (use your favorite OIDVIEW website to get the best definition possible). Once you have your OID value, you can build a classifier using the device OID and any other attribute you might want to collect from the various OID values.
One of the problems you will face is under utilized configuration of devices where optional fields were rarely (if ever) populated. As a result, things like "description" can rarely be used properly...so you may want to consider populating some fields with other values (i.e.: description = manufacturer + model + deviceOID)
Once you get the hang of how to build SNMP Classifiers, you will begin to discover all kinds of things on your network and prepare yourself for the eventual "Internet of Things" approach that your company will eventually take...
Hope this helps !
