On Fri, 2002-07-26 at 08:56, MonMotha wrote: > > Well, if you weren't uploading at the time, there was no cause for the > extreme packet loss on your end. I have seen upwards of 40% on my line, > but it was usually them doing "maintainance" (and it was scheduled for a > week in advance, so I believe them). However, if you see heavy packet > loss while you're uploading, there's a reason. The reason of course is > that when the line is maxed and you still want to send more, the device > just has to drop the packet once the queue gets full. > > This is why you commonly see terrible download speeds when uploading on > cabel modems. The TCP acks are being dropped, and the other end throttles. > > This is why people move the queue from the cable modem (which is usually > just a simple FIFO) to one one a linux box. The linux box can run a > different queue discipline that can prioritize packets much more > effectively. For example, give all TCP ACKs top end of the queue > priority to keep the downloads going at an acceptable level. > > More info availabel upon request, again ask warren to have me make a > wiki (I don't want to put up a wiki that RR wouldn't like, that's what > FreeNet is for :) > > --MonMotha
"move the queue from the cable modem to a linux box" I hope this doesn't require modification of the cable modem, because if so I would not support the publishing of this information. Otherwise if this is only Linux QoS, by all means that is good information and not RR specific.
