Arris routers and modems are currently one of the best network devices in the market. The Arris Motorola SB6121 cable modem allows you to connect to the web, your home network, and the phone so you won’t need a separate wireless router.

The Arris modem has DOCSIS 3.0 standard which is the industry standard facilitating high bandwidth data transfer for users who have an existing cable TV system. The Arris Motorola SB6121 is a multi-functional device as you can make calls over it using the EMTA (Embedded Multimedia Terminal Adapter) technology. The unique thing about SB6121 is that it doubles as a router.

As a user, you will have to connect a lot of devices and may have to configure your modem. This article will help you log into the Arris Motorola SB6121 cable modem and router.

Prerequisites to Access the Default Login Gateway of Arris Motorola SB6121:

• A system connected to the home Wi-Fi.
• A personal computer to access a browser.

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5 Steps to Log in to Arris Motorola SB6121 Router

Step 1: Open the Web Browser

Enter the default IP address in the search bar/URL of your browser. The IP address for the Arris Motorola modem ls 192.168.2.1, you can also click on this link: http://192.268.2.1 to directly open the default gateway.

Step 2: Enter the Default Username and Password

If you enter the correct IP address for your modem, you will be able to view the login screen to enter the username and password. If you are operating the modem for the first time, use the default username and password, if not, look for the box of the F5D7230-4 model or the default credentials.

• Login Username: admin
• Login Password: Motorola

Note: The above username-password combination was correct in 100% of cases.

Step 3: Setting Up the Arris Motorola SB6121 Login Details

The default username and password of your modem can be easy for anyone to fiddle with thus the recommended need to change the default username and password. This will make the modem more secure from any suspicious login attempts.

Tips to Change your Username and Password:

• Your password should have a mixture of alphanumeric characters and special characters.
• Your password should be 8-16 characters long, complex yet easy to remember.
• Username should be user-friendly and simple.
• Username and password for Arris Motorola cable modem need to be written down somewhere as a precaution.

Step 4: Change SSID for Arris Motorola SB6121 Modem

The different Wi-Fi names that you see inside the network tab is called the Service Set Identifier (SSID). By default, the name that appears is of the brand which manufactures the modem so in this case, you may see the SSID as SB6121. 

You should change the default name because if you don’t then it will be easy for anyone to guess your details.

Quick Tips:

• Make the SSID short and simple.
• Don’t make it very fancy as it may backfire.
• Don’t use any personal information to set the name of your modem.

Step 5: Secure Arris Motorola SB6121 Cable Modem Settings

Inside the default gateway, see the encryption settings of your network. You need to set the encryption to WPA2-PSK which is currently the industry standard. It ensures that your modem operates at the best possible security level.

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Solutions to Arris SB6121 Modem Issues

1. Arris Motorola SB6121 Password Doesn’t Work

The default password is the word “admin”. In case it doesn’t work then most probably you or someone may have already changed the default password. The quick fix is to reset the modem. Press-and-hold the reset button for 30 seconds.

2. Forgot Password to Arris Motorola SB6121 Modem

Common sense dictates to try hard to remember or find the paper where you have written the password. If you don’t find anything then you may try to contact the ISP or Xfinity forums and look for a different set of default passwords to use. If nothing works, try doing a reset for your modem.

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

Press-and-hold the reset button for 30 seconds.

1. When the modem is powered on, press the reset button and hold for 30 seconds. (Use a paper clip or something sharp)
2. While holding the reset button pressed, unplug the power of the modem and hold the reset button for 30 seconds.
3. While still holding the reset button down, turn on the power to the unit again and hold for another 30 seconds.

Let us know in the comments if our five-step guide helped you solve your networking issues.