How to Chack Path MTU from your PC to www.anyone.com

[YANGCCIE4]

Morning Pros,

I have one way to check out the  path MTU from your pc to  any Internet site, use ping command,

anyone has other way, or software,

thank you for share,

Yang

[Sergei Vasilenko]

Hi Yang,

You migth try to use mturoute tool with '-t'.

It could downloaded from here, for example:

http://www.elifulkerson.com/projects/mturoute.php

"mturoute.exe - Debug the MTU values between you and a host."

...snip...

C:\mturoute-src\bin>mturoute -t www.slashdot.org
mturoute to www.slashdot.org, 30 hops max, variable sized packets
* ICMP Fragmentation is not permitted. *
* Maximum payload is 10000 bytes. *
 1  --+---+++-+++-++  host: 192.168.2.1  max: 1500 bytes
 2  --+---+++-+++-++  host: 10.90.160.1  max: 1500 bytes
 3  --+---+++-+++-++  host: 68.87.56.165  max: 1500 bytes
 4  --+---+++-+++-++  host: 68.87.56.213  max: 1500 bytes
 5  --+---+++-+++-++  host: 68.87.56.209  max: 1500 bytes
 6  --+---+++-+++-++  host: 68.87.56.201  max: 1500 bytes
 7  --+---+-+++++++  host: 68.87.56.197  max: 1472 bytes
 8  --+---+++-+++-++  host: 68.87.56.249  max: 1500 bytes
 9  --+---+++-+++-++  host: 68.87.56.253  max: 1500 bytes
10  --+---+++-+++-++  host: 68.87.19.177  max: 1500 bytes
11  --+---+++-+++-++  host: 12.118.149.13  max: 1500 bytes
12  -----+---+-+--  host: 12.123.3.14  max: 285 bytes
13  ---+----+-----  host: 12.123.3.109  max: 758 bytes
14  --+---+++-+++-++  host: 192.205.32.198  max: 1500 bytes
15  --+---+++-+++-++  host: 204.70.192.186  max: 1500 bytes
...

Thanks,
Sergey

[Ganesh Hariharan]

Morning Pros,
I have one way to check out the  path MTU from your pc to  any Internet site, use ping command,
anyone has other way, or software,
thank you for share,
Yang

Hi Yang,

mturoute.exe is a small command line application that uses ICMP pings of various sizes in order to determine the MTU values on the path between itself and the target system. It also includes a "traceroute" like mode where it will attempt to determine the lowest MTU between the local host and each hop in the communication.

The utility generates maybe 100 times as much traffic as a normal ping does, so you should exercise restraint when running it on networks you do not administer.

Hope to help

Ganesh.H