Using LAN Ports to Connect Multiple Routers: What Are the Implications?

In the realm of networking, routers and switches serve distinct purposes in managing the flow of data. Routers are designed to connect different networks and direct traffic between these networks, while switches manage and distribute traffic within a local network (LAN). This article delves into the intricacies of connecting two routers via LAN ports and how it impacts their functionality.

Understanding the Roles of Routers and Switches

Before we dive into the specifics of connecting two routers through LAN ports, it's crucial to understand the roles of routers and switches. Routers are the devices that connect different networks, directing traffic between them based on IP addresses. They are responsible for making routing decisions and ensuring data is delivered to the correct destination.

On the other hand, switches are used to connect multiple devices within a local network. They facilitate the efficient transfer of data between devices by maintaining a table of MAC addresses and forwarding traffic to the correct device. This function is crucial for managing local network communication without the need for the complexity of routing decisions.

Connecting Two Routers Through LAN Ports: DiSCOVering the Truth

There is often confusion about whether connecting two routers through LAN ports will transform their functions. Some believe that by linking two routers with LAN ports, the routers might start acting like switches and perform their duties without the need for routing. However, the reality is somewhat different.

No, connecting two routers through LAN ports will not change their function to that of switches. While the physical connection may seem similar, both routers will still perform their primary roles. The first router will continue to route traffic between different networks, while the second router will continue to manage traffic within the local network (triggered by the LAN connection). This setup can be useful for expanding your network infrastructure, but it doesn't alter the fundamental functions of routers and switches.

Understanding the Network Setup

Let's break down a typical scenario to illustrate this:

Imagine you have two routers, Router A and Router B. You have a device connected to Router A's LAN port 1 via an Ethernet cable. You then connect another Ethernet cable from Router A's LAN port 3 to Router B's LAN port 1. Furthermore, you have another device connected to Router B's LAN port 2. In this setup:

Device connected to Router A's LAN port 1 will communicate with the device connected to Router B's LAN port 2. Both routers will function as routers, routing traffic between the different networks. No router is being used in a manner that would make it function as a switch, and no router is using its WAN port in this configuration.

This configuration allows for the expansion of your network but retains the core functionality of the routers in managing network traffic.

Does the Wireless Access Point Function Remain Unaffected?

Another common question is whether the wireless access points on the routers remain functional in this setup. The answer is yes, both wireless access points will continue to function as intended. However, you should check the routers' user manuals to ensure that you are not violating any specific configurations or limitations that could affect the wireless functionality.

Conclusion

In conclusion, connecting two routers through LAN ports does not change their fundamental functions. Both routers will continue to route traffic between networks and manage traffic within the LAN, respectively. This setup provides a flexible way to expand your network infrastructure while maintaining the core routing and switching functions.

For more detailed guidance on networking configuration and troubleshooting, refer to the manufacturer's documentation or professional IT support.