I cant connect to xbox live cause of my mtu setting

An MTU is the largest physical packet size, measure in Bytes that a network is capable of transmitting.. If messages are larger than the MTU they are divided into smaller packets before they can be sent. All networks have different MTU's which the owner of the network set at what they want to set it at. 576 is a very common MTU if you connect through PPP. 1500 is the most common MTU for Ethernet connections. The Xbox Live system requires your network to have a certain Maximum Transmission Unit (MTU). MTU values are important to the performance of online games. If this test fails, you can adjust the MTU setting on your network router or equivalent device to resolve the problem. Xbox live requires the network you use to have a maximum MTU. This is key to online gamesing. If the MTU fails then you have to adjust the router you are using. If you cannot access the router to adjust the MTU the you will not be able to play online games.

Two things needs to be cleared:

1) Which connection did you talking about LAN/WAN?

2) Xbox live may not be up yet, can you verify it?

Most home gateway routers can only change WAM MTU for certain connection type (PPPOE), and cannot set MTU for LAN and other WAN connection.

To change MTU for PPPOE, going to WAN connection setting, and you will see the MTU options box. But do not change it unless your ISP told you to do so.
So make sure Xbox live is online -- I am no Xbox fun so I have no idea how it works, but just guess from your message.

Today would be a bad time to test for a connection issue with XBox Live. It is down today for maintenance, if it worked before today, I would just wait until tomorrow and try again.

http://www.product-reviews.net/2009/06/16/xbox-live-down-on-june-16-maintenance-also-for-zune/

You may have to use trial and error to find the best MTU fit:

MTU Default of 1500 to 1492
Tart the setting the MTU @ 1400

MTU setting. Xbox LIVE requires a minimum MTU setting of 1364.
The information your console sends and receives is broken up into "packets" for transmission over your network. MTU is a setting that controls the size of these packets. If it's too small, you won't be able to connect to Xbox LIVE.
Top Solutions Try these solutions in order. If you give each one a shot and you still can't connect, contact Xbox Customer Support. Note that they will ask you try the suggestions on this page first.
Solution 1: Check your router MTU settings Xbox LIVE requires a minimum MTU setting of 1364. Usually, you can change your MTU setting from your router configuration web page, which is supplied by your router manufacturer.
Learn how to find and use your router configuration page
Look for the MTU setting on the router configuration page. When you find it, set it to Auto or 1364 (or higher), save your settings, and then try to connect to Xbox LIVE again on your console.

Solution 2: Connect directly to the modem If your router's MTU is set correctly, try bypassing it by connecting your console directly to the modem. This will help determine whether there's a problem with your router or something else on your network.
Note
This may require you to move your console to a location close to your modem. This is a temporary arrangement, meant only to troubleshoot your connection. If your console is connected wirelessly, you'll need an Ethernet cable for this step.
To connect your console directly to your modem (wired connection):

1. Find the Ethernet cable that runs between your console and the router.
2. Unplug the cable from the router, leaving it connected to the console.
3. Find the Ethernet cable that runs between the router and the modem.
4. Unplug the cable from the modem, and plug the cable from your console in its place.

To connect your console directly to your modem (wireless connection):

1. Unplug the USB connector for your adapter from the console. The adapter can remain attached to the console.
2. Plug an Ethernet cable into the Ethernet port on the back of the console.
3. Find the Ethernet cable that runs between your router and the modem.
4. Unplug the cable from the modem, and plug the cable from your console in its place.

Try to connect to Xbox LIVE again. If it works, there may be an issue with your router. Double-check the MTU setting in solution 1 above. Also confirm that you're using a compatible router, and make sure it has the latest updates from the manufacturer. If the problem persists, you may want to try a different router.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe


I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

mtu is not working cant hook up xbox live

Access the routers setup page by typing 192.168.1.1 (ip address of the router) on the address bar on IE.

then on basic setup page at the bottom part of the page you will see MTU normally its on auto,
to change the value set it to manual. ask your isp what is their prefferred value for the mtu you can go as high as 1300 to 1500.

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.

Hi can you please help me i was on xbox live tryed to connect with a router and now my 360 is askin for an ip address,but we do not no it can you please help thanks Paul

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.

Make an account offline that should work.