Question 140
An ISP circuit fails while active sessions continue pointing at its original member until the FortiGate detects the failure and supports reconnection. Which observable result BEST demonstrates that the intended FortiGate security or connectivity requirement is satisfied?
Explanation
Correct Answer
Approved sessions recover over a permitted secondary member according to policy while unexpected fallback links remain excluded. This is the operational validation outcome rather than merely an enabled setting. A healthy member can still be chosen incorrectly because of service-rule ordering, and existing sessions may not instantly rebalance when a different member becomes optimal. Scenario: An ISP circuit fails while active sessions continue pointing at its original member until the FortiGate detects the failure and supports reconnection.
Incorrect Answers
The FortiGate selects an eligible healthy WAN member for appropriate sessions, with degraded paths marked accurately without losing every available route. This result would test FortiGate SD-WAN members, zones and health-check design but does not demonstrate the desired FortiGate outcome here. Verify instead: Approved sessions recover over a permitted secondary member according to policy while unexpected fallback links remain excluded. Scenario: An ISP circuit fails while active sessions continue pointing at its original member until the FortiGate detects the failure and supports reconnection.
The intended application follows the approved source-aware path without inadvertently diverting unrelated users or bypassing inspection policy. This result would test Policy routes versus destination routing and session steering but does not demonstrate the desired FortiGate outcome here. Verify instead: Approved sessions recover over a permitted secondary member according to policy while unexpected fallback links remain excluded. Scenario: An ISP circuit fails while active sessions continue pointing at its original member until the FortiGate detects the failure and supports reconnection.
The preferred route is selected under normal conditions and documented alternates take over consistently when the primary path is unusable. This result would test Static route priority, administrative distance and ECMP design but does not demonstrate the desired FortiGate outcome here. Verify instead: Approved sessions recover over a permitted secondary member according to policy while unexpected fallback links remain excluded. Scenario: An ISP circuit fails while active sessions continue pointing at its original member until the FortiGate detects the failure and supports reconnection.