Posted by: Jeremy Benisek (CyberAxe) Don't Panic Business Technologies | November 18, 2010

MTU 1500 vs 1492 Website doesn’t load, over wifi, some pages work

I’ve just come across this problem in What I can tell Dell Laptops, this could also be in other systems too.

When in IE8 loading pages fails the icon just spins and spins. This might effect IE7 too, in Vista, Windows 7 32-bit/64-bit.

The problem seems to be with the Wireless of Dell XPS laptop we’re using. We’re using Qwest DSL internet, new modem, reloaded Windows 7, updated everything, new Qwest modem, checked cables. Non-of-these fixed this problem.


At CMD do below


interface ipv4 set subinterface “Wireless Network Connection” mtu=1492 store=persistent 


interface ipv4 set subinterface “Local Area Connection” mtu=1492 store=persistent

You could also try 1400 if 1458 or 1492 don’t work





  1. Thanks for the trackback, the issue would in fact affect any application that requested packets of sufficient size not just IE.

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