Question 910
At Lakeview Regional Hospital, the FortiGate 7.6 security administration team encounters the following authorized operational case: a FortiGate interface changes subnet but administrators expect the old connected network to remain routed. They need a defensible FortiOS configuration, diagnosis, validation or prevention decision. What root condition most directly explains the described FortiGate symptom?
Explanation
Correct Answer
Connected routes derive from operational interface addressing and state, not static labels. The mechanism is relevant because the stated connected route and interface state incident concerns the actual selected path, policy, identity or inspection state. The appropriate response is to update interface addressing and dependent routes and confirm active connected prefixes; verify it through this observed condition: the routing table contains only the intended connected subnets after change.
Incorrect Answers
An up physical interface is not automatically eligible for SD-WAN service selection explains a different situation, sd-wan member underlay onboarding, where a new secondary ISP circuit comes online but FortiGate SD-WAN never sends traffic through it because the physical interface is not configured as a member. It does not account for the specific observed connected route and interface state condition at Lakeview Regional Hospital. The decisive mechanism here is: Connected routes derive from operational interface addressing and state, not static labels.
SD-WAN service rule order can determine which steering rule governs a matching session explains a different situation, sd-wan rule first-match ordering, where generic internet SD-WAN service selection consumes traffic before a later specialized finance application rule. It does not account for the specific observed connected route and interface state condition at Lakeview Regional Hospital. The decisive mechanism here is: Connected routes derive from operational interface addressing and state, not static labels.
A wrong next-hop configuration can prevent SLA probes or selected flows from leaving the member explains a different situation, sd-wan member gateway mismatch, where a newly added broadband member is marked unavailable because its SD-WAN gateway IP points to a former router. It does not account for the specific observed connected route and interface state condition at Lakeview Regional Hospital. The decisive mechanism here is: Connected routes derive from operational interface addressing and state, not static labels.