Technical Tip: FortiSwitch using Fortilink on HTTPS mode does not display the line under topology

[ehamud]

Description	This article describes how to include the topology lines from FortiSwitch managed by Fortilink HTTPS.
Scope	FortiSwitch v7.4.2 onwards, FortiGate v7.4.2 onwards
Solution	Return settings to factory default by pressing the reset button on the front of the FortiSwitch. Update the FortiSwitch to v7.4.2 or above. Validate FortiGate has v7.4.2 or above. Configure FortiLink HTTPS under FortiSwitch: FortiSwitch1 # config switch-controller global FortiSwitch1 (global) # sho fu | grep mgmt     set mgmt-mode https FortiSwitch1 (global) # FortiSwitch1 # config system flan-cloud FortiSwitch1 (flan-cloud) # sho fu config system flan-cloud     set interval 3     set name "30.30.29.1"     <----- FortiLink IP.     set port 443     set service-type fortilink-https     set status enable end Authorize FortiSwitch from the FortiGate. Sometimes more FortiSwitch are needed, on this case the other FortiSwitch can use FortiLink CAPWAP or all the topology can use FortiLink in HTTPS mode. Confirm FortiSwitch is online from the FortiGate CLI:  FortiGate# execute switch-controller get-conn-status   Managed-devices in current vdom root: FortiLink interface : 1FlinkHTTPS SWITCH-ID         VERSION           STATUS         FLAG   ADDRESS              JOIN-TIME            SERIAL          FortiSwitch1          v7.6.2 (6 (GA))   Authorized/Up   2T   30.30.29.3      Tue Aug 19 13:58:01 2025     FortiSwitch2              v7.4.3 (2 (GA))   Authorized/Up   2T   30.30.29.2      Tue Aug 19 13:58:14 2025     Verify the connection status from FortiSwitch: FortiSwitch1 (flan-cloud) # get system flan-cloud-mgr connection-info Service Name:           : FortiLink User Account-ID         : 0 SSL verify Code         : ok Access Service          : IP= 30.30.29.1, Port= 443, Connected on: 2025-08-19 13:58:12 Bootstrap Service       : hostname= , Port= 0 State-Machine           : State= FLAN_MGR_STATE_READY, Event= EV_READY_SSL_SESSION_ESTD SSL Local End-Point     : Interface: internal,  IP: 30.30.29.2 SSL Tunnel Uptime       : Days: 0  Hours: 2 Mins: 28 [Connected @2025-08-19 13:58:12] SSL Tunnel stats        : restart-count= 281, Restart Reason= Unknown Tunnel State Stats: ======== Switch  Keep Alive  Tx/Reply := 295 / 295 Manager Keep Alive  Rx/Error := 734 / 0 Socks   Req Rx/Last Stream-ID  := 6712 / 806 Reset   Req Rx/last Stream-ID  := 400 / 806 Goaway  Req Rx  := 0 Unknown Req Rx  := 0 Syslog FD/Tx/Err  := 10 / 4 / 0 The result is a dotted line in topology view: In order to fix this, change FortiLink neighbor discovery from 'fortilink' to 'lldp' and wait for ten to fifteen minutes for the changes to be reflected. FortiGate # config system interface     edit 1FlinkHTTPS         show fu | grep neighbor         set fortilink-neighbor-detect lldp     next end After the change, the line will be completely solid under the topology view: