Re: shaping: dividing bandwidth between router & NAT hosts

green wrote at 2010-03-04 22:35 -0600:
> Alex Samad wrote at 2010-03-04 16:18 -0700:
> > On Thu, 2010-03-04 at 15:17 -0700, green wrote:
> > > green wrote at 2010-02-12 08:03 -0700:
> > > > An automatic detection of down/up bandwidth would be great...
> > >
> > > Is it even possible to implement traffic shaping without knowing the available
> > > bandwidth?
> >
> > If you setting to fix limits why not ?
>
> I'm not setting fixed limits, I am prioritizing traffic by type/connection/IP.
>
> > > For example, can I set up egress shaping on the internet interface without ever
> > > specifying a bandwidth limit? In that case will the queues be always empty?

At some point in my research, I seem to have answered my question. Some of
this came from LARTC and some from elsewhere (which I can't find now).

For the root qdisc, shaping must occur when a high speed interface is connected
to a slower device (like a cable modem). Otherwise the queue is in the cable
modem rather than in the Linux device.

I am assuming then that shaping is not necessary when the interface is to a
client device, like ethernet or wireless to another host. That is, something
like SFQ will work without being under a HTB rate-limiting qdisc.

(I think there is a proper way to differentiate between these two types of a
connections...?)