On Mon, 18 May 2009 20:50:51 +1000, Hesham Soliman <hesham@elevatemobile.com> wrote: >> For UDP, I think the flow label will default to zero. > > => Do you know why the same was not done for UDP? Flow is an application-layer-dependent notion. The UDP layer does not know about it, and should hence not try to guess either. -- Rémi Denis-Courmont