@Vivien :
Pour l'IPv4 c'est normal, comme je fais du dual WAN je passe par un routeur derrière la Freebox mais je n'ai pas de solution efficace aujourd'hui en IPv6 pour le multihoming donc dans l'immédiat je n'ai que de l'IPv4.
Certes Free fournit de l'IPv6 natif (et encapsule IPv4) mais ça ne change rien sur le débit.
Ci-dessous les tests en IPv6 puis en IPv4, en étant connecté directement sur la Freebox.
Les débits sont toujours merdiques, comme depuis le début... (Free ne veut rien faire, "tout est normal").
IPv6 (1 flux) :Connecting to host bouygues.testdebit.info, port 5201
[ 4] local 2a01:e0a:2d... port 49773 connected to 2001:860:deff:1000::2 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.01 sec 6.12 MBytes 51.0 Mbits/sec
[ 4] 1.01-2.00 sec 8.88 MBytes 75.0 Mbits/sec
[ 4] 2.00-3.00 sec 8.38 MBytes 70.3 Mbits/sec
[ 4] 3.00-4.00 sec 5.00 MBytes 41.9 Mbits/sec
[ 4] 4.00-5.00 sec 8.62 MBytes 72.4 Mbits/sec
[ 4] 5.00-6.00 sec 13.1 MBytes 110 Mbits/sec
[ 4] 6.00-7.01 sec 7.00 MBytes 58.4 Mbits/sec
[ 4] 7.01-8.01 sec 9.50 MBytes 80.0 Mbits/sec
[ 4] 8.01-9.00 sec 8.75 MBytes 73.8 Mbits/sec
[ 4] 9.00-10.00 sec 13.0 MBytes 109 Mbits/sec
[ 4] 10.00-11.01 sec 6.75 MBytes 55.9 Mbits/sec
[ 4] 11.01-12.01 sec 8.38 MBytes 70.7 Mbits/sec
[ 4] 12.01-13.01 sec 11.6 MBytes 96.8 Mbits/sec
[ 4] 13.01-14.00 sec 7.00 MBytes 59.6 Mbits/sec
[ 4] 14.00-15.01 sec 11.8 MBytes 97.8 Mbits/sec
[ 4] 15.01-16.01 sec 11.4 MBytes 94.8 Mbits/sec
[ 4] 16.01-17.00 sec 6.88 MBytes 58.3 Mbits/sec
[ 4] 17.00-18.00 sec 11.5 MBytes 96.7 Mbits/sec
[ 4] 18.00-19.00 sec 7.62 MBytes 64.0 Mbits/sec
[ 4] 19.00-20.00 sec 10.1 MBytes 84.9 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-20.00 sec 181 MBytes 76.1 Mbits/sec sender
[ 4] 0.00-20.00 sec 181 MBytes 76.1 Mbits/sec receiver
IPv6 2 flux : [SUM] 0.00-20.01 sec 281 MBytes 118 Mbits/sec sender
[SUM] 0.00-20.01 sec 281 MBytes 118 Mbits/sec receiver
IPv6 4 flux : [SUM] 0.00-20.00 sec 470 MBytes 197 Mbits/sec sender
[SUM] 0.00-20.00 sec 469 MBytes 197 Mbits/sec receiver
IPv6 8 flux :[SUM] 0.00-20.01 sec 651 MBytes 273 Mbits/sec sender
[SUM] 0.00-20.01 sec 650 MBytes 273 Mbits/sec receiver
IPv6 16 flux :[SUM] 0.00-20.00 sec 798 MBytes 335 Mbits/sec sender
[SUM] 0.00-20.00 sec 795 MBytes 334 Mbits/sec receiver
IPv4 (1 flux) :Connecting to host bouygues.testdebit.info, port 5201
[ 4] local 192.168.200.22 port 49876 connected to 89.84.1.222 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.01 sec 3.50 MBytes 29.1 Mbits/sec
[ 4] 1.01-2.00 sec 8.88 MBytes 75.1 Mbits/sec
[ 4] 2.00-3.00 sec 12.8 MBytes 107 Mbits/sec
[ 4] 3.00-4.00 sec 7.00 MBytes 58.9 Mbits/sec
[ 4] 4.00-5.01 sec 5.62 MBytes 46.7 Mbits/sec
[ 4] 5.01-6.01 sec 9.50 MBytes 80.1 Mbits/sec
[ 4] 6.01-7.01 sec 10.9 MBytes 91.5 Mbits/sec
[ 4] 7.01-8.01 sec 10.4 MBytes 86.2 Mbits/sec
[ 4] 8.01-9.00 sec 5.88 MBytes 50.0 Mbits/sec
[ 4] 9.00-10.00 sec 9.00 MBytes 75.4 Mbits/sec
[ 4] 10.00-11.01 sec 8.25 MBytes 68.8 Mbits/sec
[ 4] 11.01-12.00 sec 10.8 MBytes 90.7 Mbits/sec
[ 4] 12.00-13.01 sec 6.88 MBytes 57.1 Mbits/sec
[ 4] 13.01-14.01 sec 7.50 MBytes 63.0 Mbits/sec
[ 4] 14.01-15.01 sec 8.38 MBytes 70.4 Mbits/sec
[ 4] 15.01-16.01 sec 8.12 MBytes 68.3 Mbits/sec
[ 4] 16.01-17.00 sec 9.25 MBytes 77.8 Mbits/sec
[ 4] 17.00-18.01 sec 5.50 MBytes 45.9 Mbits/sec
[ 4] 18.01-19.01 sec 6.62 MBytes 55.6 Mbits/sec
[ 4] 19.01-20.00 sec 10.2 MBytes 86.2 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-20.00 sec 165 MBytes 69.1 Mbits/sec sender
[ 4] 0.00-20.00 sec 165 MBytes 69.1 Mbits/sec receiver
IPv4 2 flux :[SUM] 0.00-20.01 sec 270 MBytes 113 Mbits/sec sender
[SUM] 0.00-20.01 sec 270 MBytes 113 Mbits/sec receiver
IPv4 4 flux :[SUM] 0.00-20.01 sec 495 MBytes 207 Mbits/sec sender
[SUM] 0.00-20.01 sec 494 MBytes 207 Mbits/sec receiver
IPv4 8 flux :[SUM] 0.00-20.00 sec 657 MBytes 276 Mbits/sec sender
[SUM] 0.00-20.00 sec 656 MBytes 275 Mbits/sec receiver
IPv4 16 flux :[SUM] 0.00-20.00 sec 818 MBytes 343 Mbits/sec sender
[SUM] 0.00-20.00 sec 815 MBytes 342 Mbits/sec receiver
Edit : je viens de faire le test en bbr et c'est juste hallucinant...
Par contre sous Windows que ce soit en cubic, ctcp, dctcp ou newreno ça ne change strictement rien... débit de merde en upload.
Je ne sais pas ce qu'on peut en conclure... Saturation chez Free ?1 flux : [ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-20.00 sec 1.17 GBytes 503 Mbits/sec 89401 sender
[ 5] 0.00-20.04 sec 1.17 GBytes 501 Mbits/sec receiver
2 flux :[SUM] 0.00-20.00 sec 1.26 GBytes 542 Mbits/sec 122231 sender
[SUM] 0.00-20.03 sec 1.26 GBytes 539 Mbits/sec receiver
Pour les abonnés Free qui ont le même genre de désagréments n'hésitez-pas à voter ici : https://dev.freebox.fr/bugs/task/29953