Re: [Bloat] [Ecn-sane] quick question

[Sebastian Moeller <moeller0@gmx.de>]

Hi Jonathan, hi Erik,

that was helpful, thanks!


I now played around with tcpdump a bit an apparently:

tcpdump -i pppoe-wan -v -n 'tcp[tcpflags] & (tcp-ece|tcp-cwr) != 0' # TCP ECN flags, ECN in action

will allow me to quickly see whether I get ECE or CWR flags in my traffic, so I will use this for the next steam download to see whether there is any ECN activity. I guess ECN echos will be apparent as these are from my host, so I might simply reduce the logging to CWR.


> On Aug 26, 2023, at 14:51, Jonathan Morton <chromatix99@gmail.com> wrote:
> 
>> On 26 Aug, 2023, at 3:42 pm, Erik Auerswald <auerswal@unix-ag.uni-kl.de> wrote:
>> 
>> I find the attached screenshot quite unreadable.
> 
> Yeah, I forgot to prevent Apple Mail from auto-shrinking it.  

	[SM] I run into this same issue from time to time ;), but even the reduced screen shot and the surrounding informatin was enough to find that "page" in the RFC.

Regards
	Sebastian



> Here's the original:
> 
> <Screenshot 2023-08-26 at 3.03.03 pm.png>
> 
> I also rearranged the formula and made log-log plots over the range of likely RTTs and bandwidths:
> <Screenshot 2023-08-26 at 3.49.14 pm.png>
> 
>  - Jonathan Morton