Chapter 19 Troubleshooting : ­Troubleshooting tools : FortiGuard troubleshooting : FortiGuard server settings : Calculating weight
  
Calculating weight
The weight for each server increases with failed packets and decreases with successful packets. To lower the possibility of using a remote server, the weight is not allowed to dip below a base weight, calculated as the difference in hours between the FortiGate unit and the server times 10. The further away the server is, the higher its base weight and the lower in the list it will appear.