UIM- unable to rediscover a device which was previously deleted

Document ID : KB000112727
Last Modified Date : 03/09/2018
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Issue:
Previously a device was deleted from USM in an attempt to resolve metric discovery issues.
This device was deleted with the option "Prevent rediscovery" checked.
Need to rediscover and redeploy a robot back to this device.
When performing a rediscovery now, the device does not appear in the USM portlet in UMP
Environment:
UIM 8.51
Resolution:
In UIM 8.5.1 there is option to remove a device through USM.

If a device is removed through USM with “Prevent rediscovery” option enabled, the device is placed in black-list, which discovery_server uses the below CSV file to maintain the list.

 <discovery_server>/excluded_devices.csv

Note that incoming inventory data for devices listed in the black-list, will no longer be saved into UIM database.

If a device is accidentially placed in the list, here is steps to dettach.

1. Deactivate discovery_server probe

2. Remove device from the list

3. Activate discovery_server probe

 If you want to remove the whole list, run discovery_server callback "clear_all_prevented_devices"
Additional Information:

https://docops.ca.com/ca-unified-infrastructure-management/8-5-1/en/installing-ca-uim/discover-systems-to-monitor/advanced-configuration/delete-devices-in-usm


https://communities.ca.com/docs/DOC-231174972-tech-tip-excludeddevicescsv