Stephan Balmer wrote at 2010-02-12 02:21 -0600: > > Frankly, use could be anything, available bandwidth could be anything. So I'm > > not seeking a perfect shaping solution but just something to, at least > > somewhat, control usage. And limit usage on the unsecured wireless interface > > too! > > The solutions most people use, including me, require you to know the > downstream and upstream bandwidth. If you don't, you can't very well move > the bottleneck to your router, so your shaping won't do anything. An automatic detection of down/up bandwidth would be great, but it is not necessary. Hmm, is there a way to set up something to test pseudo-automatically, like try wget download while the box is booting... [snip excellent ingress/egress explanation/graphics] > Yes, some people use the terms 'ingress interface' and 'egress interface'. > Please don't do this, it's confusing when we talk about traffic shaping. > > > It seems peculiar that egress delaying on the local interface (of forwarded > > packets) is encouraged but ingress delaying in the WAN interface is 'wrong'. > > Are they not essentially the same thing? > > (I'm assuming you mean ingress shaping on either the incoming or the > outgoing interface of the router.) > > Yes, they are the same thing. Both are discouraged because your router is > behind the bottleneck and you have only indirect control over what other > people send you. Another diagram: Okay, makes sense. [snip excellent ingress bottleneck explanation/graphics] > Now most ISP couldn't give a shit about interactivity. They advertise a > certain bitrate, and they will deliver that bitrate. This is best done > by maintaining a huge packet queue. If you want to beat that you have to > move the bottleneck to your gateway, which means lowering throughput by > around 10% compared to the pipe. This way, most implementations figure out > the link is congested before the huge buffer on the remote side starts > filling up. If the remote buffer ever starts filling up, you will get poor > interactivity, period. So, I just need to do ingress policing on WAN interface at 10% less than tested down bitrate... > > I basically have this (a Soekris net5501), but it acts as a wireless AP also; > > four interfaces bridged on the LAN side. > > Good. Now if you don't want to patch IMQ into your system, find a > distribution where it's included and use that. I used OpenWRT in the past, > but these days I only do egress shaping which is easily done with stock > Debian. ...And egress shaping on WAN interface. I see another message with some more tips for that, and of course examples online also. Thanks.
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