In order to load-share traffic using multiple static routes, the routes must be configured with ...

For FortiGate to perform Equal-Cost Multi-Path (ECMP) load sharing using multiple static routes, all the static routes targeting the same destination must be configured with the exact same administrative distance and the exact same priority. This equality signals to the routing table that these routes are equally preferred paths, allowing traffic to be distributed among them.

FortiGate static routes use 'priority' for tie-breaking when distances are equal, not 'weight' for unequal cost load balancing.

Assigning a unique priority when distances are the same would cause the FortiGate to select only the route with the lowest priority, not to load-share.

While ECMP involves equal costs, the concept of 'weight' for ECMP is not directly applied in FortiGate static routes; path preference is determined by distance and priority.