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ahiyaz
ahiyaz
New Member
August 31, 2020
Solved

DHCP limitation

  • August 31, 2020
  • 4 replies
  • 17075 views

hi all

 

i know there is a number of configured dhcp servers per VDOM.

Does anyone know if this limitation is applied for DHCP relay agents as well?

 

thanks

 

 

    Best answer by ahiyaz

    FYI

    just got the bellow answer from Fortinet TAC.

     

    "

    Hi,

    after a short consulting it seems that DHCP agent max limit supposed to be is the same as the DHCP server limit, which on the 60E unit is standing on max 32.

    Regards

    "

    4 replies

    rwpatterson
    rwpatterson
    New Member
    August 31, 2020

    Search for a document called the 'Maximum Values Matrix.' The limit depends on the firewall model. Larger units have larger pools, naturally. You didn't specify your model, so no one could answer that for you.

    ahiyaz
    ahiyazAuthor
    New Member
    August 31, 2020

    ive already checked that document but it only mention DHCP server and not DHCP relay agent.

    Toshi_Esumi
    SuperUser
    Toshi_Esumi
    SuperUser
    August 31, 2020

    Although I don't know the aswer but I would assume dhcp relay's limit is differnt from DHCP server's, which takes memory to do stateful operation.

    I read somewhere the number of server IPs you can configure in a dhcp-relay was 8. And I would guess if there is any limitation exist, it would be the number of interfaces instead.

    I don't think it's written anywhere. So you need to open a TT at TAC to ask. You might get a similar answer from them.

    ahiyaz
    ahiyazAuthorAnswer
    New Member
    September 10, 2020

    FYI

    just got the bellow answer from Fortinet TAC.

     

    "

    Hi,

    after a short consulting it seems that DHCP agent max limit supposed to be is the same as the DHCP server limit, which on the 60E unit is standing on max 32.

    Regards

    "

    Toshi_Esumi
    SuperUser
    Toshi_Esumi
    SuperUser
    September 10, 2020

    That's an interesting finding. Thank you for letting all of us know.

    bascheew
    bascheew
    Visitor III
    February 3, 2022

    I have a 60E with about 90 interfaces running DHCP relay.  Seems that limit is not accurate.

     

    I just tried to move all DHCP to the Fortigate and hit the 32 DHCP server limit per VDOM.  Uggghh, I was excited to eliminate another device, but I guess that's not happening.

    Toshi_Esumi
    SuperUser
    Toshi_Esumi
    SuperUser
    February 3, 2022

    Looks like you need to upgrade to at least 100F (256).
    https://docs.fortinet.com/max-value-table

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