FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
KumarV
Staff
Staff
Article Id 265672
Description

This article describes how to configure the same IP address on different VDOM links on the root VDOM.

Scope FortiGate 6.x.x and 7.x.x 
Solution

Diagram:

 

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  1. Go to Network -> Interfaces -> Create New -> VDOM Link.

 

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Now, upon trying to create a new Inter VDOM Link between VDOM B and Root using the IP from the same subnet range, it will respond with an 'IP address is in same subnet as the others' error.

 

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Set the value of the allow-subnet-overlap option to 'enable' to give the two inter-VDOM links the same IP.

 

config vdom

edit root

current vf=root:0

config system settings

set allow-subnet-overlap enable

end

 

Now, the same subnet error will not occur and FortiGate will allow the user to set the same IP.

 

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