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Hello my mtu is sayin its failed

I am trying to hook up my xbox live and i keep recieving mtu failed i do not kno what to do i been told numerous times to call the verizon, linskys and xbox and i am fed up i just want to get this thing working already its been 5 months since christmas

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  • k b Sep 29, 2008

    I have the same problem but it just recently came up, my live used to work on the same exact modem, but just one time when i plugged it in the MTU failed. now I don't know why this would happen, but if there is anyway to reset the MTU or just change it to a higher setting please let me know.


  • Anonymous Mar 07, 2009

    i have the same problem to it keeps sayin it failed

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The MTU(Maximum Transmission Unit) failure when testing the xbox's connection can be do to a few things because Xbox live requires a minimum MTU setting of 1364. Sharing a slower internet connection with other PC's in the house can cause this error, The incorrect MTU setting in your routers programming can cause this error, The lack of firmware updates to your router can cause this error, an older modem from your service provider can cause this. Old or worn network cables and jacks and or RG(coax) cables if you have cable internet could cause this. Your Router or gateway could be incompatible with Xbox live.

Try a direct connection to the Xbox without a router and reset your modem before doing it. If your able to connect then you know its the router. If not you know its the modem or cables or jacks or even your Xbox if you havent tested it elsewhere.
You can tell your ISP to mail you the newest updated modem... sometimes they will have a guy just drop one off.

Posted on May 02, 2008

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I had the same MTU error issue with the SBG1000 and XBOX. The issue is your firewall settings. There are a number of ways to resolve. If you want to verify this, temporarily turn off the firewall on the router settings, should work.

SBG1000 Settings:
1. Forward ports, 53, 3074 and 88. (You must also open these ports in the custom firewall settings)hello my mtu is sayin its failed - 56f4cf0.jpg

OR
2. Set the Xbox IP to be in a Gaming DMZ
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Search the internet for firewall settings with Xbox for step by step.
The following may be a good primer: http://portforward.com/english/routers/port_forwarding/Motorola/SBG1000/Xbox_Live_360.htm

Posted on Jan 05, 2009

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