On Oct 23, 2015, Richard Smith <smithbone@gmail.com> wrote:

On 10/23/2015 02:41 PM, Michael Richardson wrote:

Richard Smith <smithbone@gmail.com> wrote:

My test setup:

Laptop<--1000BaseT-->DUT<--1000baseT-->Server

So, given that the DUT is the only real constraint in the network, what
do you expect to see from this setup?

Given that the probably DUT can't forward at Gb/s, and it certainly can't
shape anything, it's gonna drop packets, and it's probably gonna drop them in
Rx, having overrun the Rx-queue (so tail-drop). If there is too much ram
(bufferbloated), then you'll see different results...

Setting ingress/egress to 10Mbit/s I expected to see the speed
measurements bounce around those limits with the ping times staying in
the low double digits of ms. What I saw however, was the data rates
going well past 10Mbit limit and pings up to 2000 ms.

This is what I've seen in prior rrul testing using a the 50/10 cable
link at our office and my 25(ish)/6 link at my apartment and a well
connected server on the net. That however was using QoS and not SQM.

Its that a reasonable expectation?