1
vote
1answer
285 views

Why might my HP C7200 printer appear to have an MTU of 1498?

On my wireless network, I can tracepath to a mac using MTU of 1500 on Ubuntu linux 12.04. (Mac MTU is set to 1470 for some reason, but reply frames are not that big so this does not matter) When I ...
1
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1answer
1k views

OS X Failure in Path Maximum Transmission Unit (PMTU) Black Hole Router Detection

This all started when I was trying to download a podcast on my Mac. This happens in both Snow Leopard and Lion when the Ethernet interface is set to use Jumbo Frames. prompt> curl -v -o x.mpg ...
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votes
5answers
6k views

Why does Mac OS X insist on changing my MTU to 1500?

Recently (I think after updating to 10.6.4) Mac OS X has insisted on changing my MTU to 1500, even though the router which my Mac connects to directly has an MTU of 1472. I've noticed that manually ...