> > Hmm. I don't think so. Take an AP for example. It gets a lot of packets > > from stations. Now, if you're not QoS capable then all is well. But i > > you are and some stations are as well then all those stations send QoS > > packets (+2 bytes). Or take an AP connected via wireless (WPS), WPS has > > +6 bytes so I get all incoming upstream traffic with such unaligned > > headers. > > The question is does this actually change all the time. Let's > say you took a random sample of a second worth of IP packets > over wireless, what proportion of them are going to have the > same hardware header length modulo 4? I'd think that totally depends on the traffic. If you have a non-QoS AP with WPS upstream connection, then the traffic to stations will be four-byte aligned while the WPS upstream will be at a 2-byte-mod-4 boundary. And you'll have all packets from stations come in aligned and all response packets from wherever come in as WPS. johannes
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