Background:
There is a typical network topology：

Some users might notice that, once the internet service fails, they are no longer able to access the NAS server from the local network.

The cause of this Phenomenon:
When  internet service went down and cable modem failed to provide IP address for Main Deco, both Ethernet ports on the main Deco would work as WAN ports to detect internet connection. NAS would no longer obtain an IP address from Deco.

Why do we use WAN/LAN auto-sensing on Deco?
For the Deco Mesh system, normally it would have more than 2 units and each unit has at least 2 Ethernet ports; It would be time-consuming and confusing to find out which port should be connected to the ISP modem. And supposing that the WAN port is fixed, once this port is broken, the whole Mesh kit would be useless.

Recommended Solutions:

• Given that the issue arises only when the ISP modem failed to assign IP address for the main Deco, once the cable modem recovered,  the problem should be resolved. It is suggested to contact the ISP to restore the modem connection as a priority.

• The current workaround would be connecting the wired servers to the satellite Deco units, instead of the main one.

• And We have also implemented enhancements on certain models, ensuring that the WAN port remains constant as long as the physical Ethernet connection between the modem and main Deco is unchanged, even when there is no internet service from the modem.

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• Moreover,  It is also planned to support manually fixing a specific Ethernet port as WAN post on the Deco APP later. (Some models already support this feature, such as Deco X80-5G/Deco X20-4G)