Unique identifier for ip phone class

[ayush_g]

i need to create IRE rule for ip phone class for that i dont know step by step process and user is not giving the unique identifier so anyone can help me on it to find the unique identifier.

User has shared data source column and ask to find out the unique identifier on the basis of them.

[ayush_g]

Please help me on this 

[Ashok Sasidhara · Accepted solution]

Using fields like 'Serial Number' and 'Name' as identifier entries with priority assigned to each field should work generally for most records. But you need to analyze the attributes present in all the data sources that are going to be used to populate the data in 'IP Phone' class and find out the right combination and priority of attributes that can act as the identifier entries.

You can check whether the information given in my following article about IRE is helpful:

https://servicenowguru.com/cmdb/servicenow-cmdb-identification-and-reconciliation-engine-ire/