Dear TP-Link Community,

I am having trouble establishing an Internet Connection through my TP-Link Archer C9 in the following set-up:

ISP Modem [LAN Port - 192.168.0.1]

     - 24-Port Switch TL-SG3424 [LAN Port - 192.168.0.2]

            - Archer C9 [LAN Port 1 - DHCP Disabled - 192.168.0.3 - Internet Connection NOT Working]

            - Archer C8 [LAN Port 1 - DHCP Disabled - 192.168.0.4 - Working Internet Connection]

            - Archer C8 [LAN Port 1 - DHCP Disabled - 192.168.0.5 - Working Internet Connection]

            - Archer C1200 [LAN Port 1 - DHCP Disabled - 192.168.0.6 - Working Internet Connection]

Behind my ISP Modem, I have a 24-Port Switch (TP-Link TL-SG3424) to provide all my wall RJ45 connectors a working LAN connection. Behind the 24-Port Switch, I have 4 WiFi Access Points (Archer C8, Archer C8, Archer C9, Archer C1200). All 4 Access Points (Archer C8, Archer C8, Archer C9, Archer C1200) share these same settings:

  - WAN: Not Connected (Dynamic IP)

  - LAN: Connected - Static IP 192.168.0.3 to 192.168.0.6

  - DHCP: Disabled

  - SSID: Same for all 4

  - All Other Settings: Same for all 4

The C8 and the C1200 deliver a working Internet Connection to all devices. The C9 does not, but works within the LAN, despite having the exact same settings. I left the 'Router Mode' on on purpose, as I need to blacklist some MAC addresses, which is not possible in the 'AP Mode'. In the 'AP Mode", the Internet Connection works fine, but I want to avoid using this and having the same set-up as for the C8 and the C1200.

Any ideas?

Thank you very much for your help!

Kind regards,

kurgom86