Non-existent computers keep on reappearing in console

[Ain Abdullah]

We have been trying to delete non-existent computers in the environment from console however the computers have been auto discovered.

 

Some background on this environment.

- performed upgrade and data migration from old to new servers, for both SQL and NS

- NS servers did not retain old hostname

- purging maintenance have been set to 1 day

- The environment does not have Domain Membership/WINS Import or AD Directory import

- Network discovery is enabled.

 

Read about Delete action in this KB article, in particular the following notes:

- SMP server doesn't delete/Change Asset Status for machines that are IsManaged=1 but NsOwner is another SMP server

- SMP server doesn't delete machines that are IsManaged=0

- SMP server doesn't change Asset status/ or Delete previously managed computers where SMA is uninstalled so this computer is IsManaged=0 but its inventory data is still present in the database.

 

Questions:

1. Are the computers reappearing due to the data migration and new NS having a different hostname?

2. Is there a way to delete the non-existent computer record from CMDB?

 

 

Regards,

Ain

[Igor Perevozchikov]

Hi Ain Abdullah!

Looks like this is expected result, that these unmanaged resources auto-appearing,  because "Network discovery" is enabled/schedule to run daily/weekly?

Using this simple query, you can determine how affected machine(s) is discovered

SELECT
rm.[Name],
acd.[Discovery Method],
acd.[DiscoveryDate],
rm.[IsManaged]
FROM Inv_AeX_AC_Discovery acd
JOIN RM_ResourceComputer rm
ON acd._ResourceGuid = rm.Guid
--WHERE rm.[Name] LIKE '%%'
ORDER BY rm.[Name]
ASC

Or there are some 'stand-alone' replication rules which are replicating all these unmanaged resources from old SMP to new SMP?

Best regards,
IP.

[Ain Abdullah]

Thanks for the query IP. Found out that the Discovery Method is DomainBrowseList and the computers have been discovered on a daily basis since a while ago. 

Which discovery method is this? How do I stop this discovery?

 

Regards,

Ain

[Igor Perevozchikov]

Check is there schedule enabled
Change schedule to "None" and save changes
Or uncheck "Domain browse list" and "Domain membership" checkboxes and save changes.

Best regards,
IP.

[Ain Abdullah]

Hi IP,

Thanks for your help so far.

This is what I found out from the SQL query. 

Found out that the discovery method for a number of computers are empty. Any way to delete these computers and stop them from being discovered?

Does setting  the max number of threads to 0 disable the network discovery?

 

Regards,

Ain

[Igor Perevozchikov]

Hi Ain!

Better to check what ND tasks are scheduled with repeat, so you will see when next time this network discovery task will be executed again. Find them and change schedule to avoid repeat or even delete these scheduled ND tasks (If there is no need to discover these machines and avoid they appearing again and again)

Best regards,
IP.