What is the mtu and can it be changed?

tienes un problema emn el router pero intenta directamenti sin el router

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.

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

I have been through this before, I learned how to change my mtu but that did not work. I wound up getting a new modem. And thats what worked

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

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/

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

1. From the System area, , select Network Settings.
2. Select Edit Settings.
3. Select Additional Settings, and then select PPPoE Settings.

1. Enter the PPPoE information provided by .........on the screens for: .......
2. User Name ......

• Password
• Service Name

1. Select Done. When prompted, select Test Xbox Live Connection.

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