Bonjour,
Je reviens sur ce mode WPA2/3 compatibilité.
Suite au changement de ma Freebox Delta 5 GHz par une 6 GHz j'ai également modifié le mode WPA pour passer de transition à compatibilité. Sans surprise tous les équipements se connectent en WPA2 sauf ceux qui sont sur la bande 6 GHz. Cependant j'ai constaté avec un PC portable de 2020 des performances déplorables, et j'ai rapidement fait le lien avec ce mode compatibilité. J'ai joué du ping, et c'est sans appel :
PING linuxfr.org (213.36.253.103) 56(84) bytes of data.
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=1 ttl=60 time=9.70 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=2 ttl=60 time=29.0 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=5 ttl=60 time=5686 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=6 ttl=60 time=4662 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=7 ttl=60 time=3639 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=8 ttl=60 time=2615 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=9 ttl=60 time=1591 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=10 ttl=60 time=567 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=11 ttl=60 time=4125 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=12 ttl=60 time=3079 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=13 ttl=60 time=2055 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=14 ttl=60 time=1032 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=15 ttl=60 time=11.5 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=16 ttl=60 time=10.1 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=17 ttl=60 time=16.9 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=18 ttl=60 time=16.6 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=19 ttl=60 time=10.9 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=20 ttl=60 time=10.8 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=21 ttl=60 time=10.5 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=22 ttl=60 time=9.84 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=23 ttl=60 time=10.4 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=24 ttl=60 time=10.2 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=25 ttl=60 time=10.4 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=26 ttl=60 time=11.6 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=27 ttl=60 time=11.2 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=28 ttl=60 time=10.6 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=29 ttl=60 time=112 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=30 ttl=60 time=37.3 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=31 ttl=60 time=90.8 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=32 ttl=60 time=11.0 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=33 ttl=60 time=11.2 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=34 ttl=60 time=11.4 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=35 ttl=60 time=5264 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=36 ttl=60 time=4238 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=37 ttl=60 time=3214 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=38 ttl=60 time=2190 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=39 ttl=60 time=1166 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=40 ttl=60 time=142 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=44 ttl=60 time=6372 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=45 ttl=60 time=5347 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=46 ttl=60 time=4324 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=47 ttl=60 time=3300 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=48 ttl=60 time=2277 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=49 ttl=60 time=1253 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=50 ttl=60 time=229 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=74 ttl=60 time=4529 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=75 ttl=60 time=3505 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=76 ttl=60 time=2481 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=77 ttl=60 time=1457 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=78 ttl=60 time=433 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=79 ttl=60 time=1643 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=80 ttl=60 time=597 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=81 ttl=60 time=11.5 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=82 ttl=60 time=22.3 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=83 ttl=60 time=11.4 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=84 ttl=60 time=10.6 ms
64 bytes from zobe.linuxfr.org (213.36.253.103): icmp_seq=85 ttl=60 time=21.4 ms
Voici la carte Wifi de ce PC :
Realtek Semiconductor Co., Ltd. RTL8822CE 802.11ac PCIe Wireless Network Adapter
J'ai repassé la Freebox en mode transition, la plupart des équipements se connectent à nouveau en WPA3 et les performances sont redevenues normales sur ce PC.