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vmiro
vmiro
Visitor III
January 20, 2021
Question

Multiple Spanning Tree support on Fortigate

  • January 20, 2021
  • 2 replies
  • 6148 views

Hi,

I need to connect Fortigate 100F to two L2 Cisco switches with MST.

Documentation on STP generally on Fortigate is sparse. I'm not sure is MST supported on Fortigate and how to configure it.

 

Any help would be appreciated.

 

Thanks

mIRO

    2 replies

    emnoc
    emnoc
    New Member
    January 20, 2021

    I'm pretty sure MST is not supported on fortiagtes. Fortiswicth yes but the firewall not. I would inspect the datasheet 

     

    https://www.fortinet.com/content/dam/fortinet/assets/data-sheets/FortiOS.pdf

     

    And then explore config sys switch-controller

     

    Ken Felix

    vmiro
    vmiroAuthor
    Visitor III
    January 20, 2021

    Hi,

    I just put my hands on the device and found a command:

    "config switch-controller stp-instance"

     

    then find that a MST instances are supported from 6.2 version. But, I'm afraid this is related only for switches managed by FGT...FortiSwitch.

    BroadAspect
    BroadAspect
    New Member
    February 4, 2022

    In our experience, we never use a FortiGate as a 'switch' for any purpose and there is a reason the switch feature doesn't exist on the larger models. We only use FortiGate's as routed interfaces for access or trunks to our customer's core aggregation switch(es).  If the customer only has Cisco, or only Meraki switches you may find some success on most days. But supporting the classic customer that has three or four switch vendors of varous ages and capabilities, some managed, some not, and a mix of 4 port switches under desks. You will want to beat your head against a wall if you try to use the FortiGate as an aggregation point. Maybe someone is more clever than us, but we find its not worth the hassle. 

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