The exhibits show the configuration of static routes and a session table entry for an active session. The static routes are configured with different priorities:

Route throughport1with a gateway of10.200.1.254and priority5.

Route throughport2with a gateway of10.200.2.254and priority10.

If the priority of the route throughport2is changed from10to0, this route will become more preferred than the route throughport1because lower priority values indicate higher preference. As a result, the traffic for the existing session will switch to using the more preferred route:

The session would remain active in the session table, as FortiGate does not immediately clear sessions upon route changes unless explicitly configured to do so.

The traffic for the session would then start egressing fromport2, which now has the higher priority route due to its lower priority value.

References

Fortinet Documentation on Routing Configuration

Fortinet Community on Session Handling