Avoid using two routers for home Wi-Fi; use mesh systems or access point mode instead

The Problem with Two Routers

Adding a second router to improve Wi-Fi coverage often leads to a configuration known as "double NAT." This occurs when both routers operate in their default router mode, each creating and managing its own private network. While this setup might not significantly slow down basic web browsing, it introduces complexities that can affect specific network functions.

Impact of Double NAT

Double NAT can cause problems for applications that require direct connections to specific devices, such as online gaming, port forwarding, and Universal Plug and Play (UPnP). It can also hinder device discovery within the home network, making it difficult for devices connected to different routers to communicate with each other, such as a computer on the first router and a printer on the second.

Recommended Alternatives for Better Coverage

For extending Wi-Fi coverage, mesh Wi-Fi systems are designed to create a single, unified network throughout a home. These systems use multiple nodes that work together to extend the existing network, avoiding the issues associated with double NAT. This approach provides a cleaner and more efficient solution for widespread coverage.

Utilizing Access Point Mode

Another alternative is to configure an existing router in access point (AP) mode. In this mode, the device functions solely as a Wi-Fi connection point, while the primary router continues to manage the network's routing functions. This allows for improved coverage without creating a separate routed network, thereby preventing double NAT and its associated complications.