Dear @nates02gt ,

nates02gt wrote

I have a TP Link stack set up, including the OC200 controller, ER605 V1 router and the TL-SG2210P switch.  For the last several days, the controller loses connection, both via Omada cloud and locally.  Connection is usually restored within a few minutes, only to be lost again shortly.  This seems to have happened after the latest firmware upgrades that I pushed last week.  Troubleshooting steps I have taken include:

As a secondary issue, I have two EAP610 access points (Version 1.0.4 Build 20220325 Real 5).  They both have significant WPA Authentication Timeout/Failure errors.  Over 15K in the last 2 days.  Both devices are connected via ethernet to the TL-SG2210P switch.  

1. Have you set a static IP for the OC200?
Try setting a static IP for it, for example, something like this.

1) When it drops, can devices in the LAN ping the OC200 through? Can you still access the copntroller's interface via IP address?
2) Have you made any changes to your network before or after the controller loses connection? Have you changed any settings or added any new devices?

3) What was the firmware version of the controller before it was upgraded?

2. For this EAP issue, perhaps it would be better if you started a new thread to discuss it separately, see this one:

https://community.tp-link.com/en/business/forum/topic/552406

Please shows more details about your issue like whether the wireless client can connect to the internet properly?
Is the SSID that appears in the logs 2.4G or 5G?
Does the problem occur with all clients or a specific client?
Are there multiple SSIDs set? Is there the roaming logs shown on the controller?

Best Regards!