Hi  @Viva_Lew99 

Thanks for posting here.

The firmware version of the switches is not the latest. Please first update the switch to the latest one and see if the situation persists.

If still the same, to better understand the situation, please let us know the following info:

1. A screenshot of the Device page of the controller, showing the firmware version of the SDN devices;

2. What kind of controller are you using? What's the firmware version?

3. The topology of the network;

4. When the switch is out of service, is the power LED still on? 

5. When did you install the switches? When did you first notice this issue? Did you update the system firmware, or were there any other changes?

Hi  @Viva_Lew99 

Thanks for the reply. It won't take long, around 10-30 mins.

 the switch is managed by Omada SDN Cloud Controller.

>>>To verify, it's the free version, Omada cloud Essentails, or the standard version, Omada cloud-based controller?

Viva_Lew99 wrote

 Hi @Vincent-TP 

 

Thanks for the reply.

I will proceed to upgrade the switch version 1st and let you know if the upgrade can solve the issue.

As mention, the switch is managed by Omada SDN Cloud Controller.

May I know usually how long does the firmware upgrade take?

Hi  @Viva_Lew99 

Yes， also applies to the stack switch.  It may be a little longer if there are many configs.

Viva_Lew99 wrote

  Hi @Vincent-TP 

 

It is the Omada cloud-based controller.

 

It won't take long, around 10-30 mins.

 >> May I know is it apply to stack switch? Does stack switch will required longer time?