Re: ECN

Saku Ytti via NANOG <nanog@lists.nanog.org> writes:

Even if it is unicasted, performance is destroyed due to reordering. All modern TCP stacks use cubic for congestion control, which considers reorder a packet loss.

This is not quite true any longer. Linux implements RACK-TLP (RFC8985) which prevents short-term reordering (such as that caused by ECMP) from being interpreted as a congestion event. It seems Windows does too, these days: https://techcommunity.microsoft.com/blog/networkingblog/algorithmic-improvem... -Toke