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capricorn80
capricorn80
New Member
November 7, 2018
Question

Maximize the uplink port speed on Fortigate 100E

  • November 7, 2018
  • 1 reply
  • 13194 views

Hi!

 

I have issue with 1G connection between switch to fortigate that the traffic is almost hitting the top.

I am thinking about somehow creating LACP to use two ports or three to increase the link speed between the switch and Fortigate.

I have some mixture of ideas going through my mind but if someone can suggest the best way to do it. 

Please see the attached network pic.

 

Thanks

    1 reply

    ede_pfau
    SuperUser
    ede_pfau
    SuperUser
    November 7, 2018

    hi,

     

    there is a link missing between the passive cluster member and VLAN 200.

     

    You can create a LACP port (aggregate) on the FGT cluster and use it instead of the 'internal' port you use now. FortiOS uses a fast LACP mode, that is, sends hello packets (BPDUs) every 2 seconds. Some switches (like Cisco) use slow LACP per default. You can change that either on the FGT or the Cisco side.

     

    Note that you will see higher throughput only if the traffic consists of many sessions. One session with a TB transfer will still be limited to 1 Gbps. That is the nature of LACP aggregates.

    capricorn80
    capricorn80Author
    New Member
    November 7, 2018

    Thanks Ede

     

    The link is there for passive cluster member and I didnt mention it :).

    What type of LACP you are proposing? Layer 2 or 3.

     

    Thanks

     

    romanr
    romanr
    New Member
    November 7, 2018

    Hi,

     

    Fortigate will use a Layer 4 algorythm for LACP.

     

    On the switch side you will have to use Layer 3 or 4 (if the switch supports it). Layer 2 LACP with a router on the other side will still limit your traffic to 1GBit...

     

    Br,

    Roman

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