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andrejrepka20
New Member
May 14, 2026
Question

FortiSwitches not visible on FortiGate -> Switch Controller but I see serial number with ports being online in FortiSwitch Ports menu

  • May 14, 2026
  • 2 replies
  • 44 views

Hello everyone, I just encountered issue while connected Access Switches (specifically 148F and 124G) to our core switch 2048F.
 

In our enviroment we have FGT 120G as perimeter firewall which is connected to 400F that serves as segmentation firewall and also as switch controller. 2048F is main core switch from which I have connected few access switches (148F and 124G). For some strange reason out of 9 switches only 6 came online without issue. The other 3 did not show up. Strangely I can see the ports leds blinking and if I go to FortiSwitch Ports and roll out the ports of the 2048F I can see the ports online with the missing switches serial numbers shown. The 3 missing switches would show up for authorzation I have waited approx. 30+mins. I have tried to add the FortiSwitches manually but they are still shown as “Offline”.

Attaching screenshot from FortiSwtich Controler → Managed Switches


This is how it looks from Fortiswitch Ports menu (I circled the switches which I added manually and are offline in managed switches)

 

2 replies

andrejrepka20
New Member
May 14, 2026

I ran this command after some digging but really did not find any solutions. Just pasting it here if it helps…

ISFW1 # execute switch-controller diagnose-connection ASW011


Fortilink interface ... OK
fortilink  enabled

DHCP server ... OK
fortilink  enabled

NTP server ... OK
fortilink  enabled
NTP server sync ... OK
Timeout!

HA mode Active-Passive... enabled


Fortilink
Status ... SWITCH_AUTHORIZED_NOT_CONNECTED
Last keepalive ... syncing


No IP address retrieved for FortiSwitch ASW011
CAPWAP
Remote Address : N/A
Status ... Idle

funkylicious
SuperUser
SuperUser
May 14, 2026

 

"jack of all trades, master of none"
andrejrepka20
New Member
May 15, 2026

Thank you but I went through all of these articles, I wanted to see if someone in here has any particular experience with the same issue and can provide some insight.

There is big chance that restarting the affected switches or factory reset to re-establish the CAPWAP negotiation will fix the issue but wanted to see if there is some configuration mismatch or something.

All the hardware that was installed and connected were out of the box without any configuration done. Strange that 6 switches correctly came up and 3 are stuck in offline. 

funkylicious
SuperUser
SuperUser
May 15, 2026

a power cycle should do the trick for the internal/mgmt interface to acquire a capwap ip via dhcp or you can set it statically

"jack of all trades, master of none"