[luau] Re: Configuring Router

Warren Togami warren at togami.com
Fri Jul 26 21:02:01 PDT 2002


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.






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