Insufficient MTU issue

I've recently had XBox returned after a paid repair with MS, and figure it must be a refurbished model, as the firmware is several versions old.  Unfortunately there appears to be an issue with the network connection.  With my previous system, I didnt need to do anything other than connect it to my router, with this one, I had to set a permanent IP address, and now it's telling my I have an Insufficient MTU.  This was not an issue with the system I sent away, nor is it an issue with my PS3.  I've run through all of the guides and the issue remains.

 

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Last updated July 4, 2018 Views 0 Applies to:

Hey mate, can you please answer the bold questions listed here, to better help us help you? Also, just to be sure, have you worked through the steps in this guide?  

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Thanks.  Yep, gone through all of the steps there.  And there's no change to my network since the system I sent away was running on it.  Answers as follows.

What Country/State/Province do you live in? - Queensland Australia

Modem brand & model number: Unbranded Optus Cable modem

Router brand & model number: DLink  DIR 632

Network Connection Type: Wired

Things you have tried: Everything in the guide

Is UPnP Enabled? Unknown

Is NAT Type Open? Unknown

Any Error Codes you encounter: Insufficint MTU (currently unable to access xbox)

What type of internet do you have? CABLE

Who is your ISP(Internet Service Provider)? Optus

When you run "Test Xbox LIVE connection" what is the exact message shown on screen? Insufficient MTU (may be able to post when I get home later)

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Have you called your ISP, as that guide suggests if none of those steps resolve the issue? If so, what did they have to say?

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Yes, they advised there has been no change in my service, and there's no reason as far as they can tell as to why this console should be experiencing this issue.  I'm suspecting it must be an issue with the refurbished console, as it's never been a problem before.

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Sorry, I missed that the issue began as soon as you started using the returned console. In that case, it may be best to ring phone support, to see what they have to say about the issue, and possibly, a replacement. And just to be sure, have you tried connecting the Xbox 360 directly to the modem, to see if the issue persists then?

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Yep, all as per the guide.  No luck.  I'll call phone support.

Cheers

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