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Author Topic: MTU test  (Read 1067 times)

Weaver

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Re: MTU test
« Reply #15 on: July 19, 2018, 05:03:09 AM »

It now works, perhaps iOS 11.4.1 or a possible accompanying Safari release fixed it, because I changed from iOS 11.4 TO 11.4.1 last Fri.
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boost

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Re: MTU test
« Reply #16 on: July 19, 2018, 08:25:35 PM »

You may be able to use the standard OS ping utility too?

Look for the options to set the DF bit 'do not fragment' and the size of the packet. For Windows, it's something like:

ping bbc.co.uk -f -l 1500

Just keep reducing it until you find the point where you don't receive the packet too big error, usually somewhere around 1472 for ICMP.

You should always get a response of some sort. If you see 'request timed out' you have problems :)
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