---
title: "Raspberry Pi CM4 Dual Ethernet Card"
url: "https://maker.wiznet.io/mason/projects/raspberry-pi-cm4-dual-ethernet-card/"
markdown_url: "https://maker.wiznet.io/mason/projects/raspberry-pi-cm4-dual-ethernet-card/md"
type: "UCC: User Created Content"
author: "CSRLabs"
author_url: "https://csrlabs.io/raspberry-pi-cm4-dual-ethernet-card.html"
editor: "WIZnet"
editor_url: "https://maker.wiznet.io/"
original_author: "CSRLabs"
original_url: "https://csrlabs.io/raspberry-pi-cm4-dual-ethernet-card.html"
published: "2023-06-12"
language: "en"
likes: 1
views: 392
comments: 0
source: "WIZnet Makers (https://maker.wiznet.io/)"
---

# Raspberry Pi CM4 Dual Ethernet Card

> Raspberry Pi CM4 Dual Ethernet Card

Original author: CSRLabs (source: https://csrlabs.io/raspberry-pi-cm4-dual-ethernet-card.html)

## Article

The article discusses using a Raspberry Pi as a server due to its low cost and small form factor, making it an ideal choice for projects requiring a low-power, low-cost server. This could include applications such as home automation, home media servers, or small-scale web servers. The Raspberry Pi's limited resources can be optimized to build a highly available, fault-tolerant system.

One way to enhance its functionality is through a dual NIC (Network Interface Controller) connection. The benefits of this setup include:

1. Redundancy: If one Ethernet connection fails, the other one can keep the system connected and communicative.

2. Improved reliability: The system can continue to operate even if one connection has issues.

3. Maintenance: A dual NIC system allows for easier and less disruptive maintenance by disconnecting one cable at a time.

The article further discusses hardware options for providing a Raspberry Pi with two Ethernet connections. It references a piece by Jeff Jeerling, which emphasizes the benefits of a NIC attached to a PCI Express lane over a USB-to-Ethernet controller. The author also mentions testing two Ethernet-to-SPI bus cards, although both had unresolved issues. The piece seems to aim at exploring the potential and challenges of creating a more robust and reliable network connection with Raspberry Pi systems.

---

Source: https://maker.wiznet.io/mason/projects/raspberry-pi-cm4-dual-ethernet-card/