Set dhcp lease time in FortiGate 100D

The lease time means life of an IP address remains assigned to a device. Once the ip address life ends, the address is released for the next request of an IP address.  The default lease time is 7 days.

To modify the lease time, use the following CLI commands:

Step-1 Switch to configuration mode

system config dhcp server

Step-2 show the list of available dhcp servers type

get

Step-3 chose the dhcp server you want to edit in my case server entry number is ‘1’ so i will type

edit 1

Step-4 set the lease time according to your requirements, i will set lease time ‘1’ hour  (1 hour = 3600 seconds).

set lease-time 3600

Save the configurations

end