Xbox Live - MTU Error

Suggestion: <b>MTU Error</b>

This issue occurs if your router or the gateway is incompatible with Xbox Live, or if your router or the gateway has an incorrect MTU setting. Note: Xbox Live requires a minimum MTU setting of 1364. We recommend that you try out the steps shown below.

Things to try:
1. Ensure that you have properly setup your connection to Live by using the Connectivity Wizard http://www.xbox.com/en-US/support/connecttolive/xbox360/connectionmethods/webconnectivitywizard.htm
2. Visit the following Web site to determine whether you have the correct firmware version that has been certified as compatible: http://www.xbox.com/en-US/live/connect/routerlanding.htm
3. See the router or gateway instruction manual for information about how to change the MTU setting to 1364, to do this, or to determine whether your router supports this feature, see the router support documentation or contact support for your router device.
4. If you share a connection with a router and a modem, try a direct connection without the router.

For additional information on this topic refer to the following KB article: http://support.microsoft.com/kb/908882/

This issue occurs if your router or the gateway is incompatible with Xbox Live, or if your router or the gateway has an incorrect MTU setting. Note: Xbox Live requires a minimum MTU setting of 1364. We recommend that you try out the steps shown below.

Things to try:
1. Ensure that you have properly setup your connection to Live by using the Connectivity Wizard http://www.xbox.com/en-US/support/connecttolive/xbox360/connectionmethods/webconnectivitywizard.htm
2. Visit the following Web site to determine whether you have the correct firmware version that has been certified as compatible: http://www.xbox.com/en-US/live/connect/routerlanding.htm
3. See the router or gateway instruction manual for information about how to change the MTU setting to 1364, to do this, or to determine whether your router supports this feature, see the router support documentation or contact support for your router device.
4. If you share a connection with a router and a modem, try a direct connection without the router.

For additional information on this topic refer to the following KB article: http://support.microsoft.com/kb/908882/

MTU stands for "Maximum Transmission Connection". Some routers and/or network gateways are incompatible with Xbox LIVE, while others may be compatible but merely need to have a setting changed. If you compare your router to the list of routers at the following web address, you can confirm whether or not your hardware has been confirmed as compatible with Xbox LIVE by Microsoft:

http://www.xbox.com/en-US/support/connecttolive/xbox360/homenetworking/equipment.htm

Whether or not your hardware is listed as compatible, it would still be a good idea to check your instruction manual for the hardware you are using and see how (if possible) to change the MTU settings. Microsoft suggests that the MTU setting should be 1364. Using untested hardware or hardware not listed as compatible may still work, however, future updates to LIVE may suddenly make your hardware incompatible, as updates to LIVE and the Xbox console are made to work with the specifications of tested and listed compatible routers and gateways.

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.

What does MTU do on Xbox Live?

The MTU of your router or gateway must be greater than or equal to 1365. If it is less than 1365, you won’t be able to connect to Xbox Live.

To change the MTu login to your admin router panel:

1. Go to start>Run>cmd>type ipconfig
2. look for "default gateway" then type that address into your router login, usally the login is admin/admin if not look in your manual or call your router maker.
3. Now login locate the area to adjust the MTU if you cant find it, contact the router maker, or look in your manual.

More info:
http://www.xbox.com/en-US/support/connecttolive/xbox/connectionmethods/diagnosingconnections.htm

Good luck!
Cam