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ByteHaven
ByteHaven
Explorer III
January 29, 2026
Solved

FortiNAC behaviour while upgrading/down

  • January 29, 2026
  • 1 reply
  • 379 views

Hello everyone,

 

I would like to know what's the network's behaviour when FortiNAC is down (unrecheable) or doing a firmware upgrade ? 

Are the users stuck in the isolation VLAN or the behaviour is as if FortiNAC never existed ?

 

Is FNAC 7.2.7 version stable, or should I upgrade to the latest versions 7.6.x ?

 

BR,

Best answer by AEK

Hi BH

When FNAC is down, there is no dynamic VLAN assignment/change anymore. It means you back to the ancient world where you set the port VLAN manually.

That also mean the current VLANs will just remain as is:

  • If a port was in prod VLAN because a Corp PC was plugged then it will remain in prod VLAN
  • If a port was in isolation for any reason then it will remain in isolation

That's why you have to worry about what should be the VLAN assignment of a port that is in idle state, and this depends on your productivity-security compromise.

1 reply

AEK
SuperUser
AEKAnswer
SuperUser
January 29, 2026

Hi BH

When FNAC is down, there is no dynamic VLAN assignment/change anymore. It means you back to the ancient world where you set the port VLAN manually.

That also mean the current VLANs will just remain as is:

  • If a port was in prod VLAN because a Corp PC was plugged then it will remain in prod VLAN
  • If a port was in isolation for any reason then it will remain in isolation

That's why you have to worry about what should be the VLAN assignment of a port that is in idle state, and this depends on your productivity-security compromise.

AEK
ByteHaven
ByteHavenAuthor
Explorer III
February 2, 2026

Hello AEK,

 

Thank you so much for this detailled explanation.

 

What version would you suggest I upgrade to ? I currently run 7.2.7.

 

BR,

AEK
SuperUser
AEK
SuperUser
April 2, 2026

Hi BH

Regarding your last question, I think 7.2.9 is currently the most stable.

Currently 7.6 is at 7.6.5. I'm planing to use it in production very soon, especially if Emirjon confirms that we can use it in production (or should we wait for some extra patch levels?).

AEK
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