Hi  @mitkodi 

Here's an analysis and possible solutions for the problem you're facing with the EAP650:

**Possible Causes**

1. **Interference or Signal Issues** -

Although you mentioned that it doesn't seem to depend on the number of connected devices, interference from other wireless networks or physical obstacles could still be a factor. - Poor signal quality might cause the clients to establish a connection with the AP, but the connection is not stable enough for proper data transmission. This could be due to issues such as electromagnetic interference from other electronics, thick walls, or other wireless devices operating in the same frequency range.

2. **Configuration Errors** - There could be misconfigurations in the network settings of the EAP650, OC200, or the router. For instance, incorrect VLAN (Virtual Local Area Network) settings, incorrect IP addressing schemes, or incorrect routing configurations. - If the AP is not properly configured to communicate with the local network devices (like the OC200 and the router), it can lead to clients being unable to access other network resources.

**Solutions**

1. **Firmware Update** - Check if there are any firmware updates available for the EAP650.  - Go to the TP - Link official website, find the support page for the EAP650, and look for the latest firmware version. Follow the instructions provided to update the firmware. Make sure to back up any important settings before the update.

2. **Wireless Signal Optimization** - Use a Wi - Fi analyzer tool to check for interference and signal strength. You can adjust the position and orientation of the EAP650 to get better signal coverage. - If possible, change the wireless channel on the EAP650 to a less congested one. In the 2.4GHz band, channels 1, 6, and 11 are often recommended as they have less overlap with adjacent channels. In the 5GHz band, you can use a Wi - Fi analyzer to find the least used channels.

How to optimize wireless performance of EAP products

3. **Network Configuration Check** - Review the network configuration of the EAP650, OC200, and the router. - Check the IP addresses, subnet masks, default gateways, and VLAN settings. Ensure that the EAP650 is correctly configured. - If you're using VLANs, make sure that the clients are assigned to the correct VLAN and that the VLAN settings on the AP, switch (if applicable), and router are consistent. 

If the issue persists, don't hesitate to let us know.

  @Vincent-TP , unfortulatelly that didn't help.

**Possible Causes**

1. **Interference or Signal Issues** - It happens also when the client is next to the AP.

2. **Configuration Errors** - There is no VLANs, the IP address is correct and it's the same as when the client have access to the other devices in the LAN.

**Solutions**

1. **Firmware Update** - It's on the latest version (v1.1.0)

2. **Wireless Signal Optimization** - As I mentioned it happens also when the device is near to the AP. At the same the other devices that are much more further (several metters and wall between them and AP have access)

3. **Network Configuration Check** - No issues with the metnioned.

So, giving that after after reboot it works for a while and this happens to various clients, if there is no other suggestions I'm inclined to think it's just a faulty device and the only possible solution might be to try to replace it and see will have the same problems.

Hi  @mitkodi 

If you excluded all the mentioned potential causes, you may contact the retailer to get a replacement.

  @Vincent-TP 

I made some more tests and think that there is an issue with ARP packets. When a device losses internet connection it can successfully ping the AP it's connected to but nothing else. I captured packets from all APs and saw that the device constantly broadcasting ARP requests. Also, if I turn off "ARP-to-Unicast Conversion" setting, the problem goes away temporary (like for a minute or two) and then losses connection again with the the other devices unless the AP it's connected to is rebooted.

 Hi @mitkodi 

How many EAP units do you have? Are you using an Omada controller to manage them?

Please also let us know the type of controller you are using.

Did you contact your retailer?

  @Vincent-TP 

I use OC200 controller and here is the map (last week I swapped EAP650-01 and EAP650-02 but there is no change):

  @mitkodi 

To better assist you, I've created a support ticket via your registered email address, and escalated it to our support engineer to look into the issue. The ticket ID is TKID241142764, please check your email box and ensure the support email is well received. Thanks!
Once the issue is addressed or resolved, welcome to update this topic thread with your solution to help others who may encounter the same issue as you did.
Many thanks for your great cooperation and patience!