[Guy Harris <guy@xxxxxxxxxxxx>]

Fabiana moreno wrote:
> im streaming an mpeg4 video with darwin streaming system to a client 
> computer in a wireless network....

So the machine sending the packets is using Darwin Streaming Server? 
What OS is that machine running?

> i need this id to perform qos 
> parameters measures. how can i set the flag off?

Whether you *can* get the OS's networking stack to set the IP ID to a 
value other than 0 (and presumably thus not to set the "don't fragment" 
flag), and, if so, how you would do it, depends on the operating system. 
 OS X doesn't appear to have a way to request that the flag be turned 
*on*, so I assume you're not doing this on OS X.  A quick look at the 
Linux 2.6.24.2 IPv4 stack doesn't show any immediately obvious way to 
request that the flag be turned on, either.