DescriptionThis article explains how to specify more than one DHCP relay IP, to allow for the coverage of additional LAN subnets. It is possible to set up to 8 IPs from the CLI. This option is also available on GUI since version 5.4.
For versions before V5.4:
To specify more than one IP for DHCP relay, run from CLI:
#config system interface
set dhcp-relay-ip <FIRST_IP> <SECOND_IP> ....<EIGHTH_IP>
#config system interfaceNote: The WebUI will show only 1 IP. The rest of the configuration can be viewed only from CLI.
set dhcp-relay-ip 220.127.116.11 18.104.22.168 22.214.171.124
FGT# show system interface dmz
config system interface
set vdom "root"
set dhcp-relay-ip "126.96.36.199" "188.8.131.52" "184.108.40.206"
set type physical
For versions V5.4 and above:
Go to Network -> Interfaces -> Interface_NAME
#FGT # config system interfaceNote.
FGT (interface) # edit port2
FGT (port2) # set dhcp-relay-service enable
FGT (port2) # set dhcp-relay-ip 220.127.116.11 18.104.22.168 22.214.171.124
Fortinet will send the requests to all the DHCP servers configured in the relay settings and the client will accept an offer from the first DHCP server to reply.