.

I wanted to see like below to verify what you have the GW and mask as well as reserved IP config:

(below includes bogus MAC addresses)

config system dhcp server
    edit 1
        set dns-service default
        set default-gateway 192.168.1.99
        set netmask 255.255.255.0
        set interface "internal"
        config ip-range
            edit 1
                set start-ip 192.168.1.100
                set end-ip 192.168.1.254
            next
        end
        config reserved-address
            edit 1
                set ip 192.168.1.1
                set mac 00:00:00:00:00:01
            next
            edit 2
                set ip 192.168.1.2
                set mac 00:00:00:00:00:02
            next
   ---<snip>---
        end 
    next
end