DHCP Limits?

5 replies
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I am using FortiGate also as a DHCP server, because in a HA failover arrangement I get failover security also for DHCP. Now: I wonder if it is OK to use FortiGate for as many as 500 leases, or there is a danger to overflow some internal tables, or to slow down the firewall ? The model is FortiGate 300A, with V4.0 MR1 Patch 1. TIA Alex

abelio

SuperUser

not 500, for that model/firmware you can define until 200 leases for each interface check http://kb.fortinet.com for ' Fortigate Maximum values Matrix version 4.0'

A

Anonymous_UserAuthor

Esteemed Contributor III

Thanks Abel. My understanding is that the 200 limit in ' Fortigate Maximum values Matrix version 4.0' reffers to reservations (as defined by config system dhcp reserved-address), not to leases. Besides, I already have over 300 leases on one of the interfaces. TIA Alex

abelio

SuperUser

Indeed Alex, you' re right; the limit is for the reserved MAC<->IP table size. Regarding to your original concern, i dunno; look the memory usage as you add address over time; if you' re doing some regular monitoring, resulting memory usage graphs could show something useful. regards,

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