---
sourceDocument: Yokohama IT Operations Management
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/yokohama/it-operations-management

 Release :

    - yokohama

ft:locale :

    - en-US

ft:publication_title :

    - Yokohama IT Operations Management

ft:clusterId :

    - itom

bundleId :

    - itom

workflow :

    - Technology


---

# Configure Service Mapping to work with the Configuration Management Database (CMDB)

# Configure Service Mapping to work with the Configuration Management Database (CMDB) {#ariaid-title1}

* Release version: Yokohama
* 
* Updated January 30, 2025
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

Configure Service Mapping to use the existing data within your CMDB to run top-down discovery and map application
services.

## Before you begin

Verify that the necessary tables are populated with data according to the process explained in [CMDB-based mapping](https://servicenow-prod.fluidtopics.net/HgDSLpWvqjZyHYu4j6gxMg "Using data stored in the Configuration Management Database (CMDB), you can run top-down discovery and map your organization's application services without having to access a MID Server.").

* Transmission Control Protocol (TCP) Connection \[cmdb_tcp\] table
* Running Process \[cmdb_running_process\] table
* Hardware \[cmdb_ci_hardware\] table
{#map-app-services-with-cmdb__ul_y3j_k1k_ybc}

Confirm that you have installed the Service Mapping Plus August 2024 version from the ServiceNow® Store.

Role required: service_mapping_admin

## Procedure

1. Enter <kbd class="ph userinput">sys_properties.list</kbd> in the navigation filter.
2. In the System Properties \[sys_properties\] table, search for the sa.topdown.enable_cmdb_based_mapping property.
3. Set the sa.topdown.enable_cmdb_based_mapping system property to configure Service Mapping to use the data in your CMDB.
   1. Confirm that the Type field value is set to true\|false.
   2. Set the Value field to <kbd class="ph userinput">true</kbd>.
   {#map-app-services-with-cmdb__substeps_eft_rxk_wbc}