Network Discovery scan does not move Client Not Found to Client found after a

  • 3891829
  • 26-Feb-2007
  • 27-Apr-2012


Novell ZENworks Asset Management 7 - ZAM7


Network Discovery scan does not move Client Not Found to Client found after a
subsequent rescan. Below is an example of what a customer may see:
Discovery said this computer does not have the client installed. But when looked up in "Discovery-->Reports-->Find Device", this DNS computer name had two entries, one for the wireless connection and one for the hardwire connection. One said the client was installed and the other said not installed.


The source of this bug was the Network Discovery Engine, NetDisc.dll. It was reporting a bogus MAC address for SNMP enabled devices which did not return a valid MAC address.
Fixed in IR9 - Please also see note at end of resolution.
Fixed in ZAM 7.0 IR 9.
If downloading the Interim Release manually from, the filename is ZAM700SP1ir9.EXE. The Interim releases can also be set up within the ZAM Manager for the Task server to check the site on a scheduled basis, and download and apply them automatically. Please refer to the Help Section for details of how to set up automatic downloads if desired.

Each interim release is cumulative. If Interim Release 9 is not available due to a newer interim release being placed on the website, be assured that the code needed is in the later release.

The Network Discovery Loader attempts to match a scanned device to devices previously scanned and already loaded into the database. If the information gathered from a network device by the Network Discovery Engine includes the MAC address, the Loader will not reconcile it to previously loaded data unless the MAC address values match. Unless the Engine created the same bogus MAC address for devices that SNMP enabled devices that did not return their MAC address, then the Loader would not reconcile it to previously scanned data, so added another instance of the same device.

With this fix the Engine initializes the receiving memory locations and verifies that the call succeeded before creating the displayable MAC address.

NOTE: Customers having this problem would do well to use WebConsole to delete duplicate devices or an entire segment's data prior to rescanning with this fix.