When using the discovery filter from the Spectrum discovery console with the <Not Equal To> comparison type, the results are not being returned in the manner expected. The usage notes displayed in the discovery console, Modeling Options, under filter mentions “Filter discovery results to exclude certain devices from modeling.”
When the expression set of the filter is evaluated to FALSE the returned results are correct, however if you set the filter to evaluate to TRUE the results are not returned as expected.
Vendor Name <Equal To> Cisco Systems, Inc.
Will not create devices from Cisco Systems, Inc. (as expected)
System Description <Not Equal To> SysEDGE
Does not create, but should (based upon the description of the discovery filter)