[aqm] ECN support and usage on the Internet

[Mirja Kühlewind <[e-mail]>]

Hi everybody,

we just published a paper on the state of ECN support and usage on the 
Internet. We performed a similar study than Bauer et al., probing webservers 
to get the current status. We found that about 30% of webservers (by Sep'12) 
support ECN. Unfortunately, still we saw a failure rate of 9% when checking
end-2-end path ECN usability (setting CE). Additionally, we analyzed NetFlow 
data to get a lower bound for the ECN usage which was below 1%. Then we also 
had a look at IPv6 (47,5% ECN support). At the same time we also monitored an 
increase in general IPv6 support on webserver over the IPv6 launch day last 
year (-> check the paper).

Kühlewind, M.; Neuner, S.; Trammell, B.: On the state of ECN and TCP Options 
on the Internet. Proceedings of the 14th Passive and Active Measurement 
conference (PAM 2013), Hong Kong, March 2013.

http://www.ikr.uni-stuttgart.de/Content/Publications/Archive/Kue_PAM13_40160.pdf

Do we need to start a campaign to further encourage greater ECN support (also 
of network providers)? Asking the content providers on the list(s): What are 
the reasons to not enable ECN support?

Mirja