Exam FCSS_LED_AR-7.6 Topic 3 Question 78 Discussion

Actual exam question for Fortinet's FCSS_LED_AR-7.6 exam
Question #: 78
Topic #: 3
Refer to the exhibits.




You are adding a new FortiSwitch to FortiGate for management. All necessary settings have been configured on FortiGate, but FortiSwitch remains offline. The cabling has been verified and is correctly connected.
Which misconfiguration might be preventing FortiGate from detecting FortiSwitch?

Suggested Answer: D Vote an answer

On FortiLink, FortiGate's built-in DHCP server is what gives FortiSwitch its IP so it can come under management. For automatic FortiSwitch onboarding, the DHCP server is usually set with:
set vci-match enable
set vci-string "FortiSwitch" "FortiExtender"
In the exhibit, the DHCP server for fortilink has:
set vci-match enable
set vci-string "FortiExtender"
Because theVCI string doesn't include "FortiSwitch", DHCP offers are only sent to clients whose Vendor Class Identifier matchesFortiExtender. The FortiSwitch never receives an IP, so it staysOffline.
* OptionBis wrong: member "port4" matches the physical cabling in the topology.
* OptionCis fine: FortiLink can be anaggregateinterface, not only physical.
* OptionA(ip-managed-by-fortiipam) is unrelated; FortiIPAM isn't required here.

by Lena at Mar 28, 2026, 12:36 AM

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