On 3/9/24, 10:04, "Sebastian Moeller" <[email protected] 
<mailto:[email protected]>> wrote:
> [SM] ...a big (probably the biggest) DOCSIS ISP in the USA had been remarking 
> a noticeable fraction of packets to CS1 for years (which at a time was 
> defined to mean background or lower priority and is treated as such by 
> default WiFi APs) causing issues at end users' home networks. (Said ISP, to 
> its credit, did fix the issue recently, but it tool a few years...).

[JL] Once the issue was escalated to me (thank you), it was fixed very quickly. 
;-) 

> [SM] Since I have your attention, if I try comcast's bespoke networkQuality 
> server (from your L4S tests)...I saw ECT(1) marking on my egressing packets, 
> but none on the ingressing packets... that does not seem to be in line with 
> the L4S RFCs (giving another example why RFC text alone is not sufficient for 
> much). 

[JL] That is far from a production server and we've been making config changes 
to that box all last week as we prepare for more testing - I would not trust 
any recent results. But in any case, if you are not seeing ECN marks on packets 
coming back to you, and you are off-net, then something on the path back to you 
is bleaching. Feel free to send me a traceroute privately and we can continue 
to discuss it. 

Jason


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