Which interfaces on FortiSwitch send out FortiLink discovery frames by default in order to detect a FortiGate with an enabled FortiLink interface?

Fortinet FortiLink Protocol: The FortiLink protocol is Fortinet's proprietary mechanism for managing

FortiSwitch units from a FortiGate firewall. It simplifies configuration and security policy enforcement

across the connected network devices.

Auto-Discovery: FortiLink's auto-discovery feature means that by default, all ports on a FortiSwitch

will actively send out discovery frames. This allows them to locate a FortiGate device that has a

FortiLink interface enabled, streamlining the device management process.

No Configuration Needed: You don't have to manually configure individual ports for FortiLink

discovery on FortiSwitch devices.

Reference

FortiSwitchOS FortiLink Guide (FortiSwitch Devices Managed by FortiOS 7.2): Refer to pages 13 and

14 for details on zero-touch management and FortiLink configuration.

[https://fortinetweb.s3.amazonaws.com/docs.fortinet.com/v2/attachments/27f63c72-b083-11ec9fd1-fa163e15d75b/FortiSwitchOS-7.2.0-

FortiLink_Guide%E2%80%94FortiSwitch_Devices_Managed_by_FortiOS_7.2.pdf]