How To Change MTU Settings on ASUS Router?

How To Change MTU Settings on ASUS Router?

Technical evolution is happening all around the globe, revolutionizing the world of technology and making it beneficial for human beings. The router, mesh WiFi system, and home-based networking equipment are also getting more advanced. Therefore, it’s our duty to optimize the routers and modems in our home and get the most out of their peak potential. We have researched and noticed that many houses aren’t well aware of optimizing the internet speeds on the ASUS routers and mesh WiFi system. 

Suppose you’re facing lag or low internet speed on your devices even though a good-quality ASUS router is being used as a networking device. In such a case, this post is beneficial for you. This post discusses how to change MTU settings on ASUS router, tips for better internet speed, cautions, and more. Changing the MTU setting on your router can help improve your internet speed and stability, especially if you are experiencing issues with large file transfers or streaming. Let’s optimize the MTU settings!

What is MTU or Maximum Transmission Unit?

When data is transmitted over the internet, it is divided into smaller pieces called packets. These packets are sent separately to their destination and are reassembled into the original data once they arrive. This allows for more efficient data transmission over the internet, as packets can be sent over different routes and transmitted in parallel rather than sending the entire data as one large block.

For example, when you request a webpage from a server, the server sends the webpage to your computer as a series of packets. Your computer then reassembles these packets into the original webpage you can view in your web browser. This process happens whenever you access a webpage or any other online content.

The MTU (Maximum Transmission Unit) is the maximum size of a single data packet that can be transmitted over a network. The largest amount of data can be transmitted in one go without being fragmented into smaller packets. When data packets are too large for the network to handle, they must be divided into smaller packets and reassembled at the other end via the process called fragmentation.

In general, a larger MTU size can result in faster internet speeds since it allows more data to be transmitted simultaneously. However, if the MTU size is too large, it can cause problems with network performance and stability problems. It’s crucial to find the right balance between a large enough MTU to improve speed and a small enough MTU to avoid problems. Let’s do the same things in the next post’s section! 

How To Change MTU Settings on ASUS Router?

ASUS routers support a variety of WAN (Wide Area Network) connection types to allow users to connect to the internet in different ways. PPPoE (Point-to-Point Protocol over Ethernet) is a type of WAN (Wide Area Network) connection that is often used to connect to the internet. Broadband service providers commonly use it to provide internet access over a standard Ethernet connection. The MTU is a sub-unit category in the PPPoE WAN connection type. 

Therefore, we’ll use the PPPoE WAN type to adjust and optimize the MTU value on the ASUS router. For your information, we’ll select PPPoE as the WAN connection type on an ASUS router since the broadband service provider requires it and change the MTU value using it. But you will need to login into the router settings, access the MTU under the PPPoE WAN type, set an optimized value, save the settings, and close the window. Let’s see this in detail!

Step 1: Set Up a Wired Connection on the Wireless Router.

First, connect our computer to the wireless router with the help of a particular wired connection. Your setup may vary depending on your router, its ports, and other specifications. But I have the RT-AC66U B1 ASUS router, so I’ll use this as an example. The setup is given as follows:

  • Plugin the modem’s AC adaptor’s right end into the DC-IN port while the other end is into the power outlet (wall socket).
  • Plugin one end of the wireless router’s AC adapter into DC-IN and the other into the power input, as we did in the previous step. 
  • Take two network cables. Use one to connect the modem to the router’s WAN port and the second to connect your computer to the router’s LAN port

Step 2: Login into the ASUS’s Web GUI

Once you have connected your computer to the wireless router via an adequate wired connection, it’s time to access ASUS’s Web GUI. For this

  • Click on this link, [], to launch a web browser and access the login page.
  • Once on the login page, enter your username and password and click sign in to access your account. 

Step 3: Access the PPPoE WAN Connection Type.

The next step is to access the PPPoE WAN connection type. For this

  • Locate Advanced Settings > WAN; you may have to scroll down your page to find these settings. 
  • Go to Internet Connection > Basic Config > WAN Connection Type.
  • Select the PPPoE from the drop-down menu as your connection type.

Note: There would also be several other connections type for different types of utilities. But since we want to access the MTU settings, we must select PPPoE as our primary connection type.   

Step 4: Set Up Your Desired MTU Settings.

 You can do several things from the PPPoE connection’s page setup. But since we want to change the MTU value or settings, we’ll discuss only the relevant stuff. 

  • MTU default value: The default MTU value is “1492”, according to ASUS. But you can change this if your ISP requires it. 
  • Maximum MTU value: According to the auto MTU discovery, the maximum MTU value could be “1492”, but this isn’t optimal.
  • Once you have changed the MTU settings, click “Apply” to save the new setting. 

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