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Bjoernar
Bjoernar
New Member
January 15, 2025
Question

FG-90G to FS-424E-Fiber Uplink 10G+1G

  • January 15, 2025
  • 4 replies
  • 2003 views

Hello,

 

we have two FS-424E-Fiber as core switches and two FG-90G as active/passive.

 

As we don't have enough 10G ports, we can only connect each Forti with 1x10G + 1x1G to the two core switches via MCLAG.

 

The problem is that the traffic should of course primarily run over the 10G connection, the 1G only as a passive backup.

 

If I add both interfaces to the Fortilink and deactivate the FortiLink split interface, it is not guaranteed that the 10G connection is actively used.

If I activate the FortiLink split interface, both are actively used.

 

Is there a possibility that I have overlooked?

 

Thanks and regards
Björnar

4 replies

Anthony_E
Staff
Anthony_E
Staff
January 20, 2025

Hello Bjornar,


Thank you for using the Community Forum. I will seek to get you an answer or help. We will reply to this thread with an update as soon as possible.


Thanks,

Best Regards
    Bjoernar
    BjoernarAuthor
    New Member
    February 18, 2025

    Hi Anthony,
    do you have any new information for me?

    Regards
    Björnar

    sachitdas_FTNT
    Staff
    sachitdas_FTNT
    Staff
    January 20, 2025

    One of the criteria for LACP to work is having the same link speed, so using a different speed isn't supported.

     

      Bjoernar
      BjoernarAuthor
      New Member
      February 18, 2025

      Hello, I don't want to use LACP.
      10G as an active connection and 1G as a passive backup.
      Not both together as LACP
      If I define both connections in Fortlink and activate "FortiLink Split Interface", only one connection is active at a time.
      It then always goes back to the 1G connection without me being able to influence it. The order of the interfaces doesn't matter either.

      Regards
      Björnar

      sachitdas_FTNT
      Staff
      sachitdas_FTNT
      Staff
      February 19, 2025

      Hi Björnar, Currently we don't have the option to prioritize one link over another and configure a fallback scenario.

        Anthony_E
        Staff
        Anthony_E
        Staff
        February 19, 2025

        Hi Bjornar :),

         

        Sachit is one of our best experts! Thank you, Sachit!

        Best Regards
        StefanTiefel
        StefanTiefel
        New Member
        February 25, 2026

        Hello,

        did you find a solution for the problem or how did you solve your situation?

        Regards,
        Stefan

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