Hi Tom, try this document at the bottom of this reply on best practices. There are several factors to understand in getting the most out of discovery of the network including visibility into multiple VLANs.
Also, keep in mind, the 3600 is not yet full tested and documented. As an IOS device, similar to a 1900 ISR, most of OnPlus enhanced functionality likely will work, but we have had the time yet to go through the entire portfolio. We are working on expanding the the list of devices that have enhanced support in OnPlus, you can keep track of it here:
https://supportforums.cisco.com/docs/DOC-17501
After reading the document below and applying the best techniques, let us know if you still have questions.
https://supportforums.cisco.com/docs/DOC-17579
-Marc
