[c-nsp] Ping test with DF bit and MTU / IP MTU value

[Gert Doering]

Hi,

On Wed, Jan 19, 2011 at 10:20:41AM +0800, Muhammad Atif Jauhar wrote:
>                                              ip mtu 1520
> 
> *Kindly let me know, why I am not able to ping with DF bit with size more
> than 1520 (MTU value). How can I troubleshoot the issue. *

"DF" says "don't fragment", so what is the box supposed to *do* with a
packet that is larger than the "Maximum Transmission Unit", MTU.

Either fragment, or drop.  Don't fragment -> drop.  No ping.

There's nothing to troubleshoot here, this is fully expected behaviour.

gert
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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