The Motorola SURFboard SB6121 router has No WiFi, 1 N/A ETH-ports and 0 USB-ports.
It is also known as the Motorola Motorola SB6121 SURFboard DOCSIS 3.0 Cable Modem.
SURFboard SB6121 router specifications (specs)
RAM: 32 MiB
Flash: 8 MiB
Custom firmwares: None
WiFi: No ()
WiFi bands: n/a
WiFi throughput: n/a
ETH: 1 x N/A port
Hard reset instructions for Motorola SURFboard SB6121
If your SURFboard SB6121 router is not working as it should, dropping connections or not
responsive, you should first do a reset of the router to see if the problems persist. Other
scenarios where you might want to reset your router is if you've forgotten the password or
misconfigured it and can't get access anymore.
Your can reset your Motorola SURFboard SB6121 in the following way(s):
The 30-30-30 resetThere are no specific instructions for this model yet, but you can always do the 30-30-30 reset as follows:
- When router is powered on, press the reset button and hold for 30 seconds. (Use a paper clip or something sharp)
- While holding the reset button pressed, unplug the power of the router and hold the reset button for 30 seconds
- While still holding the reset button down, turn on the power to the unit again and hold for another 30 seconds.
This process usually works for resetting any router to it's factory setting.
Note: It is worth reading more about how to reset routers with the 30 30 30 reset and what the risks and considerations are when resetting your router this way, instead of just rebooting it.
Default factory settings for Motorola SURFboard SB6121
If you have performed a reset of your SURFboard SB6121 device or not changed the defaults, you should be able to access it with the following settings:
Default subnet mask: 255.255.255.0
Default DNS server: 192.168.100.1
Note: If you are using the default settings you should change them to increase security and prevent unathorized access to your network.
SURFboard SB6121 Firmwares
Staying up to date with the latest firmware is a good idea to keep your router even more
from various security flaws.
If you want to squeeze a little bit of extra functionality out of your router, consider flashing an open-source firmware like dd-wrt, openWRT or LEDE. Flashing a custom ROM can greatly increase the stability and functionality of your old router.
Following are the firmwares that we have identified existing for the Motorola SURFboard SB6121:
Motorola stock firmware for the SURFboard SB6121
Stock firmwares for the SURFboard SB6121 are available under the download section on the modem's support page. You can also refer to the router's manual for instructions on how to upgrade the firmware.
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