https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-Using-PING-options-from-the-FortiGate-CLI/ta-p/190774
1. execute ping 8.8.8.8
2. execute ping-options interface auto interface_name - Outgoing interface. If no source-ip address is specified, the primary IP address of the interface is selected..
3. execute ping-options interval seconds - time between each ping
4. execute ping-options repeat-count repeats - how many times to repeat the ping attempt.
5. execute ping-options source auto source-intf_ip - Specify the FortiGate interface from which to send the ping.
6. execute ping-options timeout seconds - Specify, in seconds, how long to wait until the ping times out.
7. execute ping-options validate-reply yes / no - Select yes to validate reply data.
8. execute ping-options view-settings - Display the current ping-option settings.
9. execute ping-options adaptive-ping enable/ disable - - FortiGate sends the next packet as soon as the last response is received.
10. execute ping-options reset - reset ping options to default values.
