Hi  @ProSumerTester 

Did you enable the fast roaming option (Settings > Site > Services >Advanced Features > Fast Roaming)?

Here are some steps and considerations to address the problem you're facing:

1. Cable and Link Status** - Even though the AP02 is physically close, a faulty network cable or a misconfigured port on the SG2008P switch could be the issue. Use a cable tester to check the integrity of the cable connecting AP02 to the switch. - Check the port status on the switch. Some switches have LED indicators that can show the link status (e.g., solid green for a good connection, blinking for activity). If the LED is off or showing an error status, there might be a problem with the port or the cable.

2. Signal and Coverage** - The fact that you lose connection in the basement despite the close proximity of AP02 could be due to interference or a sub - optimal signal. The - 76 RSSI setting might not be sufficient in your actual environment. You could try adjusting the transmit power of AP02 to increase the signal strength. - Also, check for sources of interference in the basement. Cordless phones, microwave ovens, or other wireless devices operating in the 2.4GHz or 5GHz bands could be causing interference and affecting the Wi - Fi signal.

3. IP Address Conflict** - There might be an IP address conflict in the basement network. Check if any other device (such as a misconfigured IoT device or a statically - configured device with a duplicate IP) is causing conflicts. You can use the ARP (Address Resolution Protocol) table on the gateway or the switch to see if there are any unusual IP - MAC address mappings.

4. Firmware and Software Configuration** - Ensure that both the AP01 and AP02 have the latest firmware installed. Sometimes, firmware updates can fix bugs related to DHCP assignment and wireless connectivity. - Double - check the wireless settings such as the SSID (Service Set Identifier), security settings (e.g., WPA2/3), and channel settings. Make sure that the settings on both APs are consistent and optimized for your network. For example, if the channels of the two APs are overlapping, it could lead to interference and connection problems.