A tool to find out maximum MTU size on an IPv4 path
A tool to probe the current MTU on an IPv4 path.
So far it's compatible with Linux only however it can very easily be adapted to any other operating system.
pip install mtuprobe
The default options are sane and should give you good results. Suppose that
you want to know the current effective MTU towards
wikipedia.org, in a shell
you can try:
% mtuprobe wikipedia.org Max packet size: 1464 Expected ethernet MTU: 1492
You can check out
mtuprobe -h to get the complete list of options.
- Max packet size — Max packet size specified to
ping, meaning the size of the data segment of the ICMP packet
- Expected ethernet MTU — That's what the MTU should be if you're transmitting over Ethernet and the header sizes are what is expected from such a setup. This should apply most of the time but surely some weird network setups could violate this.
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