On Tue, 12 Nov 2019, Toke Høiland-Jørgensen wrote:

> I'm not on the nanog list, but feel free to cross-post; would be good to 
> actually get to the bottom of this issue! Marek and I already had an 
> off-list back-and-forth after that original thread, and we couldn't find 
> anything wrong on the Cloudflare side. And the RSTs have a higher TTL 
> than the actual traffic, indicating an in-path problem...

tcptraceroute supports setting/clearing ECN bits (-E), would be very 
interesting to see difference between those tcptraceroutes?

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se