rizzo at icir.org
Mon Dec 10 12:20:14 PST 2007
On Mon, Dec 10, 2007 at 11:22:33AM -0800, Chuck Swiger wrote:
> On Dec 10, 2007, at 8:56 AM, rihad wrote:
> > Hi,
> > I'm having a hard time to understand what pipe queues are with
> > respect to bandwidth limitation. ipfw(8) and dummynet(4) manuals
> > didn't help me much.
> Pipes and queues are two different things; a pipe simulates a network
> link, and a queue is used to hold packets which are backlogged because
> they are arriving faster than the outbound link (ie, a pipe) can
> transmit them.
> > How does dummynet's traffic shaping function?
> It uses a variant of weighted fair queuing.
actually the shaping uses a leaky bucket algorithm.
The weighted fair queuing is the queue management scheme used
when you have multiple queues attached to the same pipe
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