FortiSwitch ports show down in GUI, but are working mostly

Hi AustinDouglas1996

Could you please share some snapshots about the issue ? and the output of commands too. Thanks

Bill

Hi Bill, 
I hope you're doing well and keeping cool. Here is an image of the GUI showing the ports down, but these devices are connected without issue.

 Here is the switch diagnostics page on the GUI

Then here is some command output:

get system interface physical
== [onboard]
==[internal]
mode: dhcp
ip: 169.254.1.3 255.255.255.0
ipv6: ::/0
status: up
speed: n/a (Duplex: n/a)
rx : 81905237 bytes 586510 packets
tx : 400577877 bytes 829908 packets

get switch trunk
== [ 8FNTF21009498-0 ]
name: 8FNTF21009498-0 restricted: 0 members : port6

diagnose switch physical-ports summary

Portname Status Tpid Vlan Duplex Speed Flags Discard
__________ ______ ____ ____ ______ _____ ____________ _________

port1 up 8100 4070 full 100M QS, , none
port2 down 8100 4070 half - QS, , none
port3 up 8100 4070 full 100M QS, , none
port4 up 8100 4070 full 1G QS, , none
port5 up 8100 4070 full 1G QS, , none
port6 up 8100 4094 full 1G QS,TL, none
port7 up 8100 4070 full 1G QS, , none
port8 down 8100 4070 half - QS, , none
port9 down 8100 4070 half - QS, , none
port10 up 8100 4070 full 1G QS, , none
port11 down 8100 4070 half - QS, , none
port12 up 8100 4070 full 1G QS, , none
port13 up 8100 4070 full 1G QS, , none
port14 up 8100 4070 full 100M QS, , none
port15 up 8100 4070 full 1G QS, , none
port16 up 8100 4070 full 1G QS, , none prt_switch_phyport_summary: unable to get port17(#17) status
prt_switch_phyport_summary: unable to get port18(#18) status
prt_switch_phyport_summary: unable to get port19(#19) status
prt_switch_phyport_summary: unable to get port20(#20) status
prt_switch_phyport_summary: unable to get port21(#21) status
prt_switch_phyport_summary: unable to get port22(#22) status
prt_switch_phyport_summary: unable to get port23(#23) status
prt_switch_phyport_summary: unable to get port24(#24) status

port25 down 8100 1 full 10G QS, , none
port26 down 8100 1 full 10G QS, , none
port27 down 8100 1 full 10G QS, , none
port28 down 8100 1 full 10G QS, , none
internal up 8100 4094 full 1G , , none

Flags: QS(802.1Q) QE(802.1Q-in-Q,external) QI(802.1Q-in-Q,internal)
TS(static trunk) TF(forti trunk) TL(lacp trunk); MD(mirror dst)
MI(mirror ingress) ME(mirror egress) MB(mirror ingress and egress)
CF (Combo Fiber), CC (Combo Copper) LL(LoopBack Local) LR(LoopBack Remote)

It sounds like the issue you're experiencing is related to a mismatch or communication problem between the FortiGate and the FortiSwitch over FortiLink, which is causing the GUI to incorrectly show the switch ports as offline. Since you've confirmed that the devices connected to the switch ports are mostly working and the console shows activity, the physical connectivity is likely fine.

Have you tried the debug?

Debug commands to analyze FortiLink commu... - Fortinet Community

Troubleshooting | FortiSwitch 6.4.2 | Fortinet Document Library

Managed FortiSwitch Troubleshooting | Fortinet GURU

Hi,

Did you manage to solve it?

I have the same issue, ports showing down but working.

FSW in 7.6.1 and FGT 7.4.8. 

We rebooted the FSW and checked all the configurations. TAC is working on this case also.

Thanks.

Hi Bill!

The case number is 10950242.

Thanks for your help (:

Hi @lexdef 

I have checked the logs, and your issue appears to be similar to one that the engineering team is currently handling. I’ve already informed them about your case. I’ll provide an update once the root cause is identified.

Regards

Bill

Hi! I have the same issue (FortiGate 200F 7.4.9, FortiSwitch 124F-POE 7.6.4).

Switch shows online (I can access with CLI and GUI OK) and works well, but ports appears offline.

Do you have any news?

Thanks

Hi,

They finally accepted an RMA, and we solved the problem.

Regards,

Alex