Hi Dan,
> On Jan 9, 2023, at 20:56, dan via Rpm <rpm@lists.bufferbloat.net> wrote:
>
> You don't need to generate the traffic on a link to measure how
> much traffic a link can handle.
[SM] OK, I will bite, how do you measure achievable throughput without actually generating it? Packet-pair techniques are notoriously imprecise and have funny failure modes.
I am also looking forward to the full answer to this question. While one can infer when a link is saturated by mapping network topology onto latency sampling, it can have on the order of 30% error, given that there are multiple causes of increased latency beyond proximal congestion.
A question I commonly ask network engineers or academics is "How can I accurately distinguish a constraint in supply from a reduction in demand?"