[Cerowrt-devel] [Cerowrt-users] QOS settings vs speedboost and random bandwidth
jg at freedesktop.org
Mon Nov 26 10:35:04 EST 2012
On Mon, Nov 26, 2012 at 9:22 AM, Michael Richardson <mcr at sandelman.ca>wrote:
> >>>>> "Dave" == Dave Taht <dave.taht at gmail.com> writes:
> Dave> to move the fq_codel algorithm into the cable modem, OR to have
> Dave> cable modem exert flow control like ADSL modems do. Then have the
> Dave> smarter device (the router) then do smarter queuing.
> I was unaware that DSL models were doing this... is this with GbE
> ethernet level XON/XOFF? Should I assume that any DSL model with less
> than a GbE sync doesn't/can't have it? Any brands you'd like to
We don't know that all DSL modems do this.
However, in corresponding with Michael Tremer about his results (documented
it appears that a DSL modem commonly used in Germany does implement
Ethernet flow control (or he could not have gotten the results he reports
there at all; all he did was turn on fq_codel on the x86 geode router he is
using for IPfire). Whether this is "standard" in DSL modems, I have no
clue (anyone want to plow through DSL standards documents?).
I've been unable to find a supplier in the U.S. for this particular DSL
modem. Short of bidding on ebay in Europe, I was defeated (despite there
being 10's of millions of them in Germany); this isn't too surprising, as
the modem is supplied by the carrier in this case.
Note that I'm testing a DGN3500 this week with John Crispin (blogic) which
has an integrated Lantiq DSL chip (along with Atheros radios) running
fq_codel that John maintains. That may be a better option for DSL, as it
can be purchased easily via Amazon. Wish us luck (though John's early data
looks really nice).
> ] He who is tired of Weird Al is tired of life! |
> firewalls [
> ] Michael Richardson, Sandelman Software Works, Ottawa, ON |net
> ] mcr at sandelman.ottawa.on.ca http://www.sandelman.ottawa.on.ca/
> |device driver[
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