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Revision: 65986
at February 20, 2014 22:09 by biiont
Updated Code 
ping -A -c 3 -M do -s 1472 google.com
ping -A -c 3 -M do -s 1473 google.com

Revision: 65985
at February 20, 2014 22:06 by biiont
Initial Code 
ping -c 3 -A -M do -s 1472 google.com
ping -c 3p -M do -s 1473 google.com
Initial URL 

                                

                                                            

                                    

                                        

                                        Initial Description
                                        

                                    

                                    
This script allows to determine MaxTranssmitUnit size for current network.

Argument "-M" selects Path MTU Discovery strategy:
- "do" means prohibit  fragmentation, even  local one;
- "want" do PMTU discovery, fragment locally when packet size is large;
- "dont" do not set DF flag.

Argument "-s" specifies payload size. Value 1472 produces frames of 1500 bytes. And value 1473 is for frames 1501 byte which is more than usual MTU.

Arguments "-c 3 -A" are used to send 3 packets as fast as possible (adaptive ping).

                                

                                                            

                                    

                                        

                                        Initial Title
                                        

                                    

                                    
Determining MTU With Ping

                                

                                                            

                                    

                                        

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