How to write IRE rules to prevent duplication in CMDB table of CI's

[IceIronDragon]

Hello All,

We are seeing duplication of CIs in CMDB table populating from Qualys integration with VR.

We want to configure IRE rules .

how to achieve it?

any documentation on how to write these rules ?

best practices?

[Manmohan K]

@IceIronDragon 

Identifier is a unique attribute of a table. For example - serial number on computer table : Serial Number can be used as identifier because no two records on computer table will have same serial number

search is just an operation to find a particular record in a database. 

[IceIronDragon]

ok, so we have Identifier as the source table and then Search in table is like what attribute you want to search.

Criteria is on what attributes does it prevent duplication.

Quick question :  I have my duplicates on Unmatched CI class 

Identifier : sn_sec_cmn_unmatched_ci

Search in table :  ?? 

[Manmohan K]

@IceIronDragon 

The search in table is the table where the Criterion attributes reside

If serial number is criterion attribute then determine if that serial number is in the same class or another related class. you need to add that class in Search in table

[Manmohan K · Accepted solution]

@IceIronDragon 

Go through this part of link i shared earlier to understand better

[Manmohan K]

@IceIronDragon 

Follow below link for more information on CMDB Identification and Reconciliation

https://docs.servicenow.com/bundle/tokyo-servicenow-platform/page/product/configuration-management/c...