Fortiswitch disconnection with Fortigate

[kratos]

Hello,

I have a problem of disconnection with my fortiswitch, the only event of this issue in the fortigate is this: 

session dtls terminated (ev21): SERIALNUMBERFORTISWITCH is disconnected 

When this happen i lost the comunication with my fortigate, i have too several FortiAP´s this too are disconnected and the wifi connection is lost.

Fortiswitch: 3.5.5

Fortigate: 5.4.4

FortiAP: 5.4.1

[makco10]

Hello,

Try this:

1 - Disable PoE in the FortiLink port of your Fortiswitch

2- Upgrade the firmware of your fortiswitch to this version: 3.5.6

Regards.

[kratos]

Thank you so much!!

Until now i don't have the issue again.

Best regards!!!

[Prab]

kratos wrote:

Hello,

I have a problem of disconnection with my fortiswitch, the only event of this issue in the fortigate is this: 

session dtls terminated (ev21): SERIALNUMBERFORTISWITCH is disconnected 

When this happen i lost the comunication with my fortigate, i have too several FortiAP´s this too are disconnected and the wifi connection is lost.

Fortiswitch: 3.5.5

Fortigate: 5.4.4

FortiAP: 5.4.1

Hi Kratos,

Could you please post your topology/Network diagram?

Thanks & regards,

Prab