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Aug 16, 2014, 06:50 PM
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The latest theory was bandwidth limiting was the result of total usage + current bitrate going above a certain amount. If the current bitrate was always below a certain amount, maybe the total usage wouldn't be capped. The iwconfig rate command doesn't do anything anymore. The only way to limit your bitrate is now traffic shaping.

Traffic shaping in Linux is a very long, involved process, requiring in depth knowledge of the kernel. It's not supported on the phone itself. There is a tool called which hard codes the most useful configuration. When run on the pi router, it successfully limits bandwidth between wlan0 & eth0, but not bandwidth between wlan0 & another station. It has to be run on every station to limit its own wlan interface.

Traffic shaping is not bulletproof. It can't limit the rate packets come from the internet, so it tries to limit the rate of ACK packets. Bandwidth still often goes above the limit, then settles below the limit once the window is full. The problem is easier on Virgin's side, since they're on the giving end of most of the data.
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