Re: [Bloat] Comcast & L4S

[Sebastian Moeller <moeller0@gmx.de>]

Hi Rich,


> On 31. Jan 2025, at 14:20, Rich Brown via Bloat <bloat@lists.bufferbloat.net> wrote:
> 
> Google Alerts sent me this: https://www.webpronews.com/comcasts-latency-leap-a-game-changer-in-network-performance/
> 
> Key quote: "Compatibility and Ecosystem: For L4S to have a significant impact, it requires an ecosystem where both the network infrastructure and the end-user devices support the standard..."
> 
> Can anyone spell "boil the ocean"? :-)
> 
> Or am I missing someting?

Well, the whole safety mechanisms in L4$ are laughably inadequate... this "design" essentially exposes a priority scheduler* without meaningful admission control to the open internet. This is so optimistically naive that it almost is funny again. I wish all the effort and hard work to make L4$ happen, would have been put in a reasonable design... but at least I learned one of the IETF's failure modes, and that is at least something valuable ;) 


*) Just because something is not a strict preempting priority scheduler does not make it a good idea to expose it blindly... a conditional priority scheduler with e.g. L4$'  weight share of 10:1 already can do a lot of harm.


> 
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