Two more data points. Shaped my connection to 250Mbit out of the advertised 250Mbit (my usual setting) and shaped to 200Mbit out of the 250Mbit. This is a pre-linux-net-next cake running on an Edgemax ER4 with kernel 3.10.107-UBNT.

The regular spikes in ICMP ping is due to the crappy Puma 6 chipset in the cable modem. UDP is not affected.

On 21 July 2018 at 19:20, Georgios Amanakis <gamanakis@gmail.com> wrote:
On Sat, 2018-07-21 at 09:09 -0700, Dave Taht wrote:
>
> 1) Can someone else on a cablemodem (even without the latest cake,
> this happens to me on older cake and fq_codel) try this test?
>

I just tried this on my cable comcast connection. I set ingress to ~80%
of what fast.com reports when no shaper is in place.

#tc qdisc add dev ens4 root handle 8011 cake bandwidth 16000kbit dual-
dsthost docsis ingress
#tc qdisc add dev ens3 root handle 8012 cake bandwidth 2500kbit dual-
srchost nat docsis ack-filter

I got the same result as you. This is using latest cake.

Georgios

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