Thanks for the answers.
@ Toke
I was not clear on my first message but what I have in mind isn't individual shaping but more like a bandwidth limit identical for every dst-host, something like 50 mb/s by dst-host for every host instead of a global 1 Gb/s or 10 Gb/s without limit for everyone.
@Dave
Put a linux box before telecommunication hardware is what I had in mind. I will give a try with veth interfaces by customer.
As for network device, I personnaly think the objectif should then be to convice network chipset maker like Microchip, Cavium, Freescale, Broadcom, etc.
Ubnt all over this stuff ? Don't want to burst your bubble but airmax (test on M serie) use HTB + SFQ if traffic shaping is configured but default pfifo_fast if no traffic shaping is configured. On gen 2 AC, still pfifo without traffic shaping but don't know when traffic shaping is configured but I'm pretty sure it would be the same. I pretty sure airfiber line is also fifo only. I know codel is support in the edgemax router line but not compatible with cpu offload so won't be use by most except on X serie (line without cpu offload) that is often use as home/small office router. I doubt any WISP (Ubnt main market) using Edgerouter for routing would activate codel since it would hurt badly forwarding performance. Anyway, just like for CMTS, WISP bottleneck is the wireless radio, not the router.