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Sri_
Sri_
New Member
January 22, 2026
Solved

Enabling Multi-VDOM on FortiGate 100E

  • January 22, 2026
  • 1 reply
  • 306 views

I have a Fortinet FortiGate 100E (V7.2.10) running in a production environment.
Currently, multi-VDOM mode is NOT enabled.

I want to create a new VDOM.
Can someone confirm whether enabling multi-VDOM mode and creating a new VDOM will impact the existing production traffic or policies?

What precautions or best practices should I follow before enabling multi-VDOM on a live firewall?

Best answer by Toshi_Esumi

Yes. When multi-vdom is NOT set, everything you see and configure are in root vdom but the vdom name is hidden. So, when you enable multi-vdom, you see everything, except for those global stuff like interfaces, system admin, system DNS, SMTP, etc., in root vdom. But no change for its operation. It should keep working as it was before.

Toshi

1 reply

funkylicious
SuperUser
funkylicious
SuperUser
January 22, 2026

hi,

if i recall correctly, enabling multi vdom will move all the existing interfaces and rules/objects to root VDOM and should not have a impact on the traffic.

you should create/download a backup config file just in case you need to revert back or you lose some configuration.

"jack of all trades, master of none"
Toshi_Esumi
SuperUser
Toshi_EsumiAnswer
SuperUser
January 22, 2026

Yes. When multi-vdom is NOT set, everything you see and configure are in root vdom but the vdom name is hidden. So, when you enable multi-vdom, you see everything, except for those global stuff like interfaces, system admin, system DNS, SMTP, etc., in root vdom. But no change for its operation. It should keep working as it was before.

Toshi

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