ISDB static route will not create entry directly in routing-table. Reference: https://community.fortinet.com/t5/FortiGate/Technical-Tip-Creating-a-static-route-for-Predefined-Internet/ta-p/198756 and here https://community.fortinet.com/t5/FortiGate/Technical-Tip-Verify-the-matching-policy-route/ta-p/190640 FortiGate Infrastructure 7.2 Study Guide (p.16 and p.59): "Even though they are configured as static routes, ISDB routes are actually policy routes and take precedence over any other routes in the routing table. As such, ISDB routes are added to the policy routing table." "FortiOS maintains a policy route table that you can view by running the diagnose firewall proute list command."