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MTU: Difference between revisions
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→What is my MTU?
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For example:
Linux
ping -c1 -M do -s 1472 81.187.81.187
On OSX (Apple):
ping -c1 -D -s 1472 81.187.81.187
Windows:
ping -n 1 -f -l 1472 81.187.81.187
^^ That's the ping command to remember. The rest of this section is a bit of info about that command.
==Explanation:==
'''-c1 / -n 1''' In these examples, we've only used a count of one ping using the -c option
'''-M do / -f''' Means don't fragment the ping packet
''' -s 1472 / -l 1472''' The option for payload size is -s, or -l on Windows. When setting size in ping, the size printed is the payload size - not the full packet size. '''The full packet size is''' <syntaxhighlight inline> payload (1472) + IP header (20) + ICMP header (8) </syntaxhighlight>, so this is 1500 in total!
Note: ping is slightly different on different operating systems, the above is a Debian machine.
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