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How To Login Into Arris Motorola SB6121 Router

How To Login Into Arris Motorola SB6121 Router

Arris Motorola SB6121 router is an award-winning routing device that has been very popular over the years. You can use this router for creating a voice and networking gateway for homes and small offices. It has DOCSIS 3.0 standard which provides a high bandwidth data transfer for the users.

Also, it is a multi-functional device. You can call over it with the help of the EMTA technology which is known as Embedded Multimedia Terminal Adapter. The unique feature of this router is that it doubles up as a router. You can even connect a lot of devices with this modem. To work on this router, configure the modem properly. Hence, follow this article from top to bottom in order to log in to Arris Motorola SB6121. Therefore, walk through the steps described in the section below.

You also need to keep in mind some prerequisites in order to access the default login gateway of Arris Motorola SBS6121:

  • A laptop or desktop which is connected with a stable internet connection.
  • An updated version of the web browser should installed on your device.

Steps to Perform for Login Arris Motorola SBS6121 Router:

In order to login to Arris Motorola SBS6121, you need to go through the steps mentioned in the section below.

Step 1: Open a Web Browser

At the beginning of the process, you need to launch your favorite web browser and enter the default IP address in the address bar. The default IP address is You can then copy the IP address from here and paste it on the web browser.

Step 2: Enter the Default Username and Password

You will directly navigate to the router login screen when you enter the correct IP address for the modem. After that, enter the username and password in this section. Type in the username and password of the router that is default in order to access the router for the first time. The default username and password are written on the router box.

  • Default username: admin
  • Default password: motorola

Tips: Most of the time, this username and password combination was correct.

Step 3: Set up the Xfinity XB6 Login Details

One can easily predict the default username and password for the router. Hence, to avoid such a situation, you need to change the default username and password. You should also remember some points while changing the default username and password.

  • You need to create a password mixture of alphabets, numbers, and symbols as well.
  • The password should consist of 8-16 characters.
  • Create the password as simple as possible which is also easy to remember.
  • When it comes to the username, create the username user-friendly and keep it simple as possible.
  • When you set the username and password successfully, write down somewhere for further usage.

Step 4: Secure Arris Motorola SB6121 Cable Modem

Next, you need to set the encryption settings of the network which is present under the Default Gateway section. After that, set the encryption to WPA2-PSK in order to secure the modem.

Troubleshooting Methods for the Problems of Arris SB6121 Modem:

#1. Arris SB6121 Password Doesn’t Work

If the password that you have saved does not work properly, then it can occur when someone has changed the password. In most cases, the default password is the word ‘admin’ itself. Therefore, you need to reset the router by pressing the Reset button and hold the Reset button for a few seconds. You will find the Reset button on the backside of the router.

#2. Forgot Password to Arris SB6121 Modem

In case you forgot the password of the router, then, first of all, you need to find out the paper where you have written the username and password. In case, if you do not find the paper, you should contact the ISP or Xfinity forum. If you still do not have any proper solution, then you need to reset the router and change the password and username.

#3. How to Reset the Arris SB6121 Cable Modem to Default Settings

In case, you want to reset the Arris SB6121 Cable Modem, follow the steps mentioned in the under the section.

  • Press and hold the Reset button for a few seconds, when the modem is power on. You will get the Reset button on the backside of the router. 
  • Use a paper clip or something sharp in order to press the Reset button. After holding the Reset button, disconnect the power of the power and hold it for a few seconds.
  • When you successfully Reset the modem, turn on the power.