Re: [Codel] [Bloat] The challenge

[David Woodhouse <dwmw2@infradead.org>]

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On Thu, 2012-05-10 at 09:54 +0300, Jonathan Morton wrote:
> I want to buy a modem that I can put Linux on, and that supports ADSL2
> + Annex M.  Where can I get one?

http://wiki.openwrt.org/doc/hardware/soc/soc.lantiq
http://www.traverse.com.au/productview.php?product_id=117
http://www.traverse.com.au/productview.php?product_id=120

> Vaguely acceptable solutions include CardBus or PCI/PCIe slot modems
> to put in a PowerBook or a PC. 

http://www.traverse.com.au/productview.php?range_id=2

>  I have enough spare hardware to make that work, and the lines here
> are underground and so not susceptible to lightning.
> 
> > As for the *ISP* end of the link, we could talk to the ISP about
> that.
> > Their LNS isn't running Linux though; it's their own code.
> 
> I suppose the downstream side of ADSL is less vexing for now.
> Eventually AQM and FQ needs to be in the DSLAM and cell tower by
> default, though.

Probably not the DSLAM, but the ISP's LNS (where my PPP session is
terminated, over L2TP). That's what's currently limiting my downstream
traffic to 1Mb/s per line (or whatever my crappy pieces of wet string
are actually synced at today).

If we overload the DSLAM, it drops one ATM cell out of N, which nixes
fairly much *every* IP packet by dropping a tiny part of each one, and
results in almost zero throughput. We don't let the DSLAM do
buffering :)

-- 
dwmw2

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