Hi @WigTech 

Thanks for posting in our business forum.

Please use the forum search to look it up. Or in the User Guide, it has explained what "block" means in the log.

This should be a software block in which you have created a loop in your network. I believe this should be something the tech rep has told you. Did you look into it?

Rule this out first before you think that the switch is not behaving normally. And another easy way to test it, you bring the 4 switches into the same server room and cascade them. Will they work or not? Simple enough to test if this is a switch failure or the connection(scheme) problem.

Hi @WigTech 

Thanks for posting in our business forum.

WigTech wrote

  @Clive_A 

 

Thanks!

 

This is more than we have got then from the chat techs.

We got an it will clear when the loop is gone, and you can clear the log. But no process to clear the loop or clear the block.

 

I thought it has been settings, software, or maybe the non - tp link SFP adapters. The techs were leaning toward hardware problem on the main switch.
But that did not make sense because we had similar problems but lesser with some of the other switches.

 

After looking at your recommendation, I found that Auto fail over was on for wireless. So I am guessing that caused the EAP to EAP wifi connection and then the loop back and port block.

It is normal to cline to the hardware issue when you notice something happens to only one while the other 3 are working fine.

But when you mentioned the log, I think it could be the loop. Cascade them would be the easiest way to figure out if this is a hardware issue or not.

EAP was indeed one of the things that could cause a loop. I have seen this case before. You can try to clear it up and test again. Loop prevention involves automatically disconnecting the looped ports. So, it could be the case.