Question about Arris SURFboard SB5120 Modem

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Sb5120 xbox360 connection problem

Im having problems trying to get xboxlive but they keep saying that my MTU is to low and that i need to change it .But the problem is that i dont know how to change it.Please help!

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I know i may seem stupid but im having this same problem and have no idea Where to type that code......Adress bar _ this isnt where i would type like www.fixya.com is it?

Posted on Sep 29, 2008

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Try unpluginy the power suply wire for about a min. then plug it back. that seems to work on mine.

Posted on Aug 25, 2008

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Type 192.168.0.1 on your address bar.
look for any settings that say MTU and change whatever is there to any number between 1400 and 1500.
Save your settings.

Posted on Aug 24, 2008

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1 Answer

Where do you go on the ladtop to change mtu settings


Hello,

You cannot change the MTU settings in the laptop. You will have to log in to your modem/router using your laptop(when modem/router is connected through a cable).

Hope this helped.

Jan 29, 2011 | Arris SURFboard SB5120 Modem

1 Answer

I recently purchase comcast internet and cable. I have a motorola surfboard SB5101U cable modem and when I try 2 connect my xbox to xboxlive, it says that my network doesn't have a sufficient MTU setting....


You actually should call comcast and tell them about the issue, They have a backdoor into your modem that they can troubleshoot it for you. The issue with their modems is they are usually locked with some weird password they use.

Usually with a modem or router you can dial an internal page but there system like Time Warner is set to their needs so that they can keep that back-door open.

Comcast phone number is 1-800-266-2278 or 1-800-Comcast same numbers thats just the way they word it on their site.

Oct 21, 2010 | Arris SURFboard® SB5101 Cable Modem

1 Answer

Change MTU settings on an RCA DCW 725


  • There are no user configurable options to cable modems, everything is based off the configuration file that your ISP pushes to the modem during registration.

  • Try connecting your XBOX directly

Apr 07, 2010 | RCA DCM425 DIGITAL CABLE MODEM (RCADCM425)

1 Answer

Cant find the RESET button on the SB5102


the Surfboards do not have a reset button. The only sure way to reset it is to disconnect the power and any other cables for at least 12 hours to allow the board to completely discharge.

Mar 07, 2010 | Arris SURFboard SB5120 Modem

1 Answer

Cox says my SB5120 is resetting 12 pulse times a


May be firmware get corrupted due to power-cut or an excess voltage or surge problem.
At times when there is thunder-storm a lot of excess volatge is generated on the phone wire which is link down to the modem
Ok
try to download recent firmware from manufacturer and see if it can be updated.
Cheers
Uttam

Jan 14, 2010 | Arris SURFboard SB5120 Modem

1 Answer

Modem is plugged directly into laptop but still not able to surf net. when looking at network connections it says it is connected but there is no sign of connection meaning the laptop cannot browse...


Re-boot your modem. unplug it wait about 10-15 seconds, plug it back in and it should get your laptop's address. Did you have the modem connected to another device? for example a Desktop pc or a xbox360 or ps3. if you did, everytime you switch devices, you need to re-boot your modem.

Sep 14, 2009 | Arris SURFboard SB5120 Modem

1 Answer

MTU settings


where do i go to change the mtu settin on a comtrend ct-5364a

Sep 11, 2009 | Modems

2 Answers

My x box says change mtu to auto or 1364 how do i do this


My MTU is at 1500 and I get the same message. I don't think it's up yet.

Jun 17, 2009 | Arris SB5100 SURFboard DOCSIS 2.0 Cable...

1 Answer

Motorola SURFboard SB5120 MTU problem


do a hard reset.
hold the reset button for 15 seconds plugged in.
keep pressing the button and unplug the modem.
keep pressing for 15 seconds.
plug it back in but keep pressing for another 15 seconds.

This should have hard reseted the modem.
now try the 192.168.0.1

Aug 25, 2008 | Arris SURFboard SB5120 Modem

3 Answers

Changing the MTU setting


Log into modem using 192.168.2.1 in your browser and go to modem utility through browser.

May 18, 2008 | Siemens SpeedStream Modem (4100) (SS4100)

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