Asset Reconciliation is used to map systems discovered through inventory collection to the assets defined in CMDB. This has a number of uses, for example the reconciliation process helps in uncovering systems which have been purchased but are not being used or systems on the network but not in the asset database in which case they could be outside the purview of a financial system.
A direct way of mapping assets to inventory is to link the inventory while creating the assets. However this is a tedious process and mostly the assets would be imported in bulk from Excel sheets.
The typical practice is while defining the asset type, the reconciliation type is configured. Reconciliation types include Host name, MAC ID or BIOS Serial No or the Agent Tag.
Based on the reconciliation type for the asset type, the actual value for the attribute is entered into the Reconciliation Rule. Once the assets are imported and created, during the next discovery, the system uses the value in the Reconciliation Rule to map against the corresponding field in the collected inventory. This can be reviewed and approved in bulk.
Click on 'Asset Reconciliation' tab under the Asset module in CMDB. The asset reconciliation screen is displayed.
The list of assets along with the corresponding inventory information is displayed.
The ‘Link
System’ column displays the hosts the asset can probably be
linked. While it should normally be 1, there could be more if there
are systems with duplicate references like BIOS serial numbers or
host names etc. Click on 'System Details' to view the inventory details
of the systems. In cases where there are multiple systems shown under
Link System, click on 
.
A pop-up appears with the list of systems against which the asset
could be reconciled.
Select the correct system and click on 'Map System'.
Select one or more assets which have
the status 
(Not Linked with
Inventory) and click on 'Approve'
to proceed to accept the reconciliation done by the system. '
Once the reconciliation is done,
the status turns 
(Linked
with Inventory)
A status of 
indicates that no system has been found for reconciliation.
In 'Asset Reconciliation' tab, click on the 'Excel' button to export the Asset Reconciliation Report. In the Excel Report you can see a column called 'System Details'. This column displays the host name of the nodes linked with the CMDB asset. If N number of conflicted nodes are present (Duplicate Host Name, MAC Address, BIOS Serial Number), then the host name of the node will be shown N times separated by comma.