[Click] generating random destination IP packets?

[Eddie Kohler]

Hi Azeem,

You are missing one additional step: StoreIPAddress.

FastUDPSource -> SetRandIPAddress -> StoreIPAddress(16) -> 
SetUDPChecksum -> SetIPChecksum should do it.

If you are really trying to max out your outgoing bandwidth, you might 
want to alter FastUDPSource to set random destination IP addresses 
yourself, to avoid the additional checksums.  But don't optimize 
prematurely, of course: wait and see if you have a problem.

Eddie


Azeem Khan wrote:
> Hello everyone,
> 
>    I wish to generate UDP/IP packets with random destination IP addresses at different rates.  From reading the Click element documentation, I believe that FastUDPSource + SetRandIPAddress + SetUDPChecksum + SetIPChecksum should do the trick. Am I correct? 
> 
>    Will SetRandIPAddress also set the IP destination address randomly besides the annotation?
> 
>    If so, can anyone give me an example on how to use the SetRandIPAddress element? I cannot seem to get it right. I am not clear on what the arguments mean.
> 
> 
> Thank You.
> 
> Azeem Khan
> Bombay, India.
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