On Fri, May 16, 2014 at 7:56 AM, Vinny Abello <vinny@abellohome.net> wrote:
I think he's questioning why packets from speedtest.comcast.net have CS1 if everything is supposedly equal, and what that is used for. A quick Wireshark shows that to be true right now running to your Plainfield, NJ speedtest site, and my network peers directly with Comcast.
are you measuring inside the (for this) comcast network or after your cable-modem? I recall that the cable-modem(s) often (by docsis config) impose some qos markings on the lan-side of the connection. I think they can do the same on the WAN side for traffic leaving your site to the tubes... but you probably can't measure that as easily as with wireshark on your pc. -chris (also, is there some other equipment between your wiresharker and the cable-modem? could that equipment be re-marking/marking as well?)