FortiSIEM
FortiSIEM provides Security Information and Event Management (SIEM) and User and Entity Behavior Analytics (UEBA)
idabouzi
Staff
Staff
Article Id 413042
Description This article describes how to fix the 'Device merged by IP' error.
Scope FortiSIEM.
Solution

This error will occur when failing to add new devices, usually with an error (skipped) from the GUI:

 

Logs show the message below.

Example:


2025-07-04 14:41:30,089 [pool-14-thread-35750] INFO com.ph.phoenix.framework.logging.PhAudit - [PH_AUDIT_DEVICE_MERGED_BY_IP_WITH_DIFF_NAME]:[phCustId]=2008,[eventSeverity]=PHL_INFO,[phEventCategory]=2,[procName]=AppServer,[user]=SYSTEM(su),[customer]=xxxxx,[hostName]=server1,[targetHostName]=server2,[overlapIp]=10.1.1.1,[phLogDetail]=Device merged by IP with different device name

 

The logs show a shared IP (10.1.1.1) between two devices: '[overlapIp]=10.1.1.1'.

 

To fix this issue, add this IP under Admin -> Settings -> Discovery -> Generic and add the shared IP 10.1.1.1 to 'Virtual IPs'.

 

Virtual IP indication will tell FortiSIEM not to merge devices if they contain the same IP in another interface, and will discover these two devices successfully.

 

Related document:
Discovery Settings