Troubleshooting Tip: Failure to configure a management interface with error 'IP address overlap with another interface'

[Ahmed_Galal]

Description	This article describes how to troubleshoot the error 'IP address overlap with another interface' while configuring a management interface.
Scope	FortiADC.
Solution	Task: In the following example: Port1 is enabled, has an IP address, and is being used to access the FortiADC 'SSH, GUI', and the FortiADC administrator needs to have Port1 configured as a dedicated management interface. Advantages of using a dedicated management interface: Allows separate access of the Primary and Secondary in HA Active-Passive mode. Prerequisites: Console access to FortiADC or SSH/GUI access through any interface except for the MGMT interface. Error: The administrator navigates to Network -> Interface and enables the Management Status for Port1, but receives the error 'IP address overlap with another interface'. Solution: Remove the IP address assigned to port1 [Management access will be lost if Port1 is the GUI access port]: Access FortiADC through a console or any interface other than Port1. Configure Port1 as a dedicated management interface: config system ha     set mgmt-status enable     set mgmt-interface port1     set mgmt-ip 10.120.19.78/20     set mgmt-ip-allowaccess https ping ssh snmp http telnet end   Related article: Configuring the management interface - FortiADC 7.4.7 handbook