[Bloat] Really getting 1G out of ISP?

Sebastian Moeller moeller0 at gmx.de
Tue Jun 22 02:12:14 EDT 2021

On 22 June 2021 06:00:48 CEST, Stephen Hemminger <stephen at networkplumber.org> wrote:
>Is there any consumer hardware that can actually keep up and do AQM at

        Over in the OpenWrt forums the same question pops up routinely once per week. The best answer ATM seems to be a combination of a raspberry pi4B with a decent USB3 gigabit ethernet dongle, a managed switch and any capable (OpenWrt) AP of the user's liking. With 4 arm A72 cores the will traffic shape up to a gigabit as reported by multiple users.

>It seems everyone seems obsessed with gamer Wifi 6. But can only do
>300Mbit single
>stream with any kind of QoS.

IIUC most commercial home routers/APs bet on offload engines to do most of the heavy lifting, but as far as I understand only the NSS cores have a shaper and fq_codel module....

>It doesn't help that all the local ISP's claim 10Mbit upload even with
>1G download.
>Is this a head end provisioning problem or related to Docsis 3.0 (or
>later) modems?

For DOCSIS the issue seems to be an unfortunate frequency split between up and downstream and use of lower efficiency coding schemes .
Over here the incumbent cable isp provisions  fifty Mbps for upstream and plans to increase that to hundred once the upstream is switched to docsis 3.1.
I believe one issue is that since most of the upstream is required for the reverse ACK traffic for the download and hence it can not be oversubscribed too much.... but I think we have real docsis experts on the list, so I will stop my speculation here...


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