QuestionQ15

Authentication

When diagnosing a FortLink connectivity problem between a FortiGate and a FortiSwitch, why is it important to check their time and date settings?

  • A Time synchronization is critical for the CAPWAP DTLS tunnel.
  • B Time and date are used to determine the encryption algorithm on FortiLink.
  • C Incorrect time synchronization may disrupt the FortiLink discovery protocol (LLDP or MCLAG).
  • D Matching time settings ensure proper STP convergence on the FortiLink interface.
Explanation

FortiLink CAPWAP management uses a DTLS-secured tunnel. Correct time is required to validate certificate validity periods during DTLS negotiation, so an incorrect clock can prevent the CAPWAP DTLS tunnel from establishing.

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