Question 1010
At Merriton Energy Cooperative, the FortiGate 7.6 security administration team encounters the following authorized operational case: voice packets carry the expected DSCP marking but FortiGate sends them through an unintended WAN member. They need a defensible FortiOS configuration, diagnosis, validation or prevention decision. What root condition most directly explains the described FortiGate symptom?
Explanation
Correct Answer
Packet QoS markings do not automatically change link steering absent a matching rule. The mechanism is relevant because the stated sd-wan dscp handling incident concerns the actual selected path, policy, identity or inspection state. The appropriate response is to configure supported DSCP-aware SD-WAN service matching or related traffic policy; verify it through this observed condition: a tagged test voice flow is forwarded through the planned member.
Incorrect Answers
Route selection prefers a longest matching destination prefix ahead of less-specific alternatives explains a different situation, longest-prefix route selection, where traffic to a specific data center subnet follows the internet gateway even though a broad private summary route exists. It does not account for the specific observed sd-wan dscp handling condition at Merriton Energy Cooperative. The decisive mechanism here is: Packet QoS markings do not automatically change link steering absent a matching rule.
IPv4 route entries do not forward IPv6 packets and both protocol families need valid paths explains a different situation, ipv6 default route separate from ipv4, where dual-stack clients can reach external IPv4 servers but IPv6 connections fail after only an IPv4 default route was added. It does not account for the specific observed sd-wan dscp handling condition at Merriton Energy Cooperative. The decisive mechanism here is: Packet QoS markings do not automatically change link steering absent a matching rule.
A link can approach congestion before existing SLA probes show a definitive outage explains a different situation, sd-wan carrier capacity headroom, where one WAN link reaches sustained near-maximum bandwidth but the monitoring plan tracks only loss and latency. It does not account for the specific observed sd-wan dscp handling condition at Merriton Energy Cooperative. The decisive mechanism here is: Packet QoS markings do not automatically change link steering absent a matching rule.