When building and managing industrial IoT applications, it is crucial to configure network devices correctly. As a bridge connecting remote devices and the Internet, the correctness of the configuration of a 4G cellular router directly affects the stability and efficiency of data transmission. This article will guide you in detail on how to set a static IP address on a 4G cellular router to meet the needs of a specific network environment.

1. Understanding static IP address

A static IP address is a fixed and unchanging IP address that does not change when the device is restarted or reconnected. Static IP addresses are particularly important in scenarios where stable network connectivity, access to specific IP addresses, or advanced network configuration are required.

2. Preparations

① Obtain static IP address information:
Obtain one or more available static IP addresses from your Internet Service Provider (ISP).
At the same time, obtain the subnet mask, gateway, and DNS server addresses.
② Log in to the router management interface:
Accessing the router's management IP address using a browser is usually printed on the bottom of the router or in the accompanying user manual.
Enter the correct username and password to log in to the router management interface.

3. Set static IP address

① Enter the network configuration page:
In the router management interface, find and click "Network Configuration" or similar options.
Select "WAN settings" or "Internet settings", depending on the brand and model of your router.
② Select static IP configuration mode:
In the WAN settings page, find and select "Static IP" or a similar configuration mode.
③ Enter static IP address information:
In the corresponding fields, enter the static IP address, subnet mask, gateway, and DNS server address obtained from your ISP.
④ Save settings:
After completing the above steps, click the "Save" or "Apply" button to save the configuration.
⑤ Restart the router if necessary:
Some routers require a restart to take effect after changing the network configuration. Please follow the prompts or choose to restart the router yourself.

4. Verification Settings

① Check network connection:
Make sure that the network connection is normal after the router is restarted.
Use the ping command or other network tools to check whether the static IP address has been configured correctly.
② Access remote devices:
Attempt to access the router or connected device with a configured static IP address from a remote device.
Ensure that the network connection is stable and data transmission is normal.

5. Precautions

① Backup configuration:
Before making any network configuration changes, it is recommended to back up the current configuration just in case.
② Security:
Ensure the security of the username and password for the router's management interface.
Regularly update the firmware of the router to prevent security vulnerabilities.
③ Compatibility:
Different 4G cellular router brands and models may have different configuration interfaces and steps. Please be sure to refer to the user manual or online support document of the router for operation.
By setting the static IP address correctly, you can ensure the stability and security of the 4G cellular router in a specific network environment. This is crucial for building and managing industrial IoT applications. Hopefully, the guidance in this article will help you successfully complete the configuration task.