@ARGamingPK1
Okay, I understand that after you started using Ethernet backhaul on one of your satellite Deco Mesh units, you experienced IP conflict issues, loss of Internet connection, and all devices were stuck on 'obtaining IP address'. Even the Deco app showed no Internet connection, and you could not manage the system. Previously, everything worked fine on wireless backhaul, but you switched to Ethernet because the satellite unit was not getting a strong signal.
Here are some troubleshooting steps to help resolve Ethernet backhaul issues and prevent IP conflicts:
1. Check IPTV/VLAN Settings:
Go to the Deco app > MORE > Advanced > IPTV/VLAN. If IPTV is enabled, the IPTV port cannot be used for Ethernet backhaul. Make sure you are not using the IPTV port for connecting your satellite Deco.
2. Try Different Ports and Cables:
Connect the satellite Deco to a different port on the main Deco or switch, and use a different Ethernet cable to rule out hardware issues.
3. Test Direct Connection:
If you are using a switch between Deco units, try connecting the two Decos directly with an Ethernet cable. If this works, your switch may be causing the issue.
4. Check Switch Loop Detection:
When a Deco switches from wireless to Ethernet, a brief network loop (1-2 seconds) can occur. If your switch has loop detection, it may block the port connected to Deco. Turn off loop detection on your switch, reboot the switch, and try again. If unsure, contact your switch manufacturer to confirm if loop detection is enabled by default or if there are hardware problems.
5. D-Link Switch Compatibility:
Several D-Link switches are not compatible with Deco's Ethernet backhaul (IEEE 1905.1 protocol). If you are using a D-Link switch, try replacing it with a different brand.
If you continue to experience IP conflicts or loss of Internet, please contact TP-Link support with the results of these troubleshooting steps for further assistance.
Note: Since you are using Router Mode, ensure that only one device in your network is acting as the DHCP server (usually the main Deco), and that your modem/router is set to bridge mode if possible to avoid double NAT or IP conflicts.
