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What is an MTU and why is it important?

I'm having trouble connecting my Xbox to my wireless network because of MTU issue.?

  • I have just recently moved to this new house and I am still having trouble getting my Xbox to connect. I conduct a network test and it fails to connect to Xbox Live, and says that I have an invalid MTU setting. I have used Dr TCP, and have used "regedit" to modify my MTU settings and I configure my MTU to 1500 on both, but still my Xbox cannot connect. My router is a Bigpond Elite router; I can provide further details of the router's configuration if needed. Please help.

  • Answer:

    Have you tried disabling UPnP? It's an almost completely useless feature anyway unless one of your devices specifically requires it, plus the forum I'll link below seems to indicate that it may be the true cause of your problem. Read the forum for more information, but that should fix it. Otherwise, can I recommend that you buy a new router? Something from Linksys, D-link, Netgear or Belkin would undoubtedly work better. Oh yeah, and you should restore your MTU settings in regedit to default. MTU is chosen automatically by the router and device at time of connection. You should never need to change this setting.

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