Mi sono procurato l'adattatore Ugreen 25052 USB-C Ethernet 2.5 con RTL8156BG e questi sono i risultati migliori che ho ottenuto in ipv4, tutto il resto come da test precedenti (FTTH Aruba IT3 da 2.5/1Gbps su OpenFiber, ONT ZTE F6005v3, Flint 2 con OpenWRT 24.10.4 senza SQM con Hardware flow offloading, PC con Linux)
Server: Aruba S.p.A. - Ponte San Pietro (id: 40519)
ISP: Aruba Broadband
Idle Latency: 7.41 ms (jitter: 0.07ms, low: 7.28ms, high: 7.47ms)
Download: 2341.50 Mbps (data used: 2.3 GB)
27.68 ms (jitter: 35.39ms, low: 7.24ms, high: 306.33ms)
Upload: 955.28 Mbps (data used: 738.4 MB)
9.70 ms (jitter: 1.47ms, low: 6.92ms, high: 46.19ms)
Packet Loss: 0.0%
Server: EOLO - Milan (id: 11427)
ISP: Aruba Broadband
Idle Latency: 8.96 ms (jitter: 0.24ms, low: 8.88ms, high: 9.71ms)
Download: 2330.27 Mbps (data used: 2.5 GB)
26.77 ms (jitter: 35.60ms, low: 8.74ms, high: 305.16ms)
Upload: 925.25 Mbps (data used: 792.4 MB)
10.86 ms (jitter: 1.24ms, low: 8.15ms, high: 47.45ms)
Packet Loss: 0.0%
Server: Wind Tre - Roma (id: 29317)
ISP: Aruba Broadband
Idle Latency: 23.93 ms (jitter: 0.20ms, low: 23.83ms, high: 24.07ms)
Download: 2302.40 Mbps (data used: 3.8 GB)
24.14 ms (jitter: 0.33ms, low: 23.32ms, high: 26.80ms)
Upload: 942.34 Mbps (data used: 1.1 GB)
39.24 ms (jitter: 3.62ms, low: 28.47ms, high: 114.45ms)
Packet Loss: 0.0%
Server: Fastweb SpA - Rome (id: 7898)
ISP: Aruba Broadband
Idle Latency: 17.93 ms (jitter: 0.34ms, low: 17.76ms, high: 18.18ms)
Download: 2352.32 Mbps (data used: 2.9 GB)
43.14 ms (jitter: 37.81ms, low: 16.65ms, high: 319.31ms)
Upload: 959.03 Mbps (data used: 1.1 GB)
21.82 ms (jitter: 1.45ms, low: 17.36ms, high: 66.29ms)
Packet Loss: 0.0%
Server: Grain Connect - Manchester (id: 59135)
ISP: Aruba Broadband
Idle Latency: 37.19 ms (jitter: 0.25ms, low: 36.97ms, high: 37.58ms)
Download: 2222.06 Mbps (data used: 3.7 GB)
36.94 ms (jitter: 0.37ms, low: 36.18ms, high: 38.82ms)
Upload: 930.28 Mbps (data used: 1.4 GB)
40.12 ms (jitter: 5.36ms, low: 36.85ms, high: 144.21ms)
Packet Loss: 0.0%
Server: Edgoo Networks - Madrid (id: 50902)
ISP: Aruba Broadband
Idle Latency: 38.32 ms (jitter: 0.22ms, low: 37.94ms, high: 38.55ms)
Download: 2071.63 Mbps (data used: 2.6 GB)
38.28 ms (jitter: 0.32ms, low: 37.50ms, high: 39.51ms)
Upload: 944.31 Mbps (data used: 1.1 GB)
65.30 ms (jitter: 13.58ms, low: 37.69ms, high: 152.09ms)
Packet Loss: 0.0%
Server: Telia Sweden AB - Stockholm (id: 45936)
ISP: Aruba Broadband
Idle Latency: 38.37 ms (jitter: 0.16ms, low: 38.10ms, high: 38.49ms)
Download: 2200.43 Mbps (data used: 3.8 GB)
40.11 ms (jitter: 0.39ms, low: 39.28ms, high: 41.87ms)
Upload: 946.17 Mbps (data used: 1.2 GB)
45.71 ms (jitter: 7.96ms, low: 36.28ms, high: 136.50ms)
Packet Loss: 0.0%
Server: Hyperoptic Limited - Manchester (id: 40628)
ISP: Aruba Broadband
Idle Latency: 33.36 ms (jitter: 0.27ms, low: 33.03ms, high: 33.70ms)
Download: 2234.26 Mbps (data used: 3.8 GB)
33.00 ms (jitter: 0.39ms, low: 32.40ms, high: 41.83ms)
Upload: 933.82 Mbps (data used: 1.1 GB)
43.02 ms (jitter: 6.94ms, low: 32.39ms, high: 131.22ms)
Packet Loss: Not available.
Server: Orange Polska S.A. - Warsaw (id: 4166)
ISP: Aruba Broadband
Idle Latency: 35.96 ms (jitter: 0.07ms, low: 35.94ms, high: 36.15ms)
Download: 2272.84 Mbps (data used: 3.8 GB)
36.15 ms (jitter: 0.32ms, low: 35.47ms, high: 37.98ms)
Upload: 946.94 Mbps (data used: 1.1 GB)
47.57 ms (jitter: 4.82ms, low: 35.98ms, high: 139.21ms)
Packet Loss: 0.0%
Server: Blacknight - Dublin (id: 4604)
ISP: Aruba Broadband
Idle Latency: 41.15 ms (jitter: 0.22ms, low: 40.99ms, high: 41.41ms)
Download: 2211.87 Mbps (data used: 3.6 GB)
41.84 ms (jitter: 0.30ms, low: 41.20ms, high: 43.63ms)
Upload: 939.38 Mbps (data used: 1.2 GB)
72.07 ms (jitter: 8.90ms, low: 41.33ms, high: 138.09ms)
Packet Loss: 0.0%
Server: Surfshark Ltd - New York, NY (id: 36817)
ISP: Aruba Broadband
Idle Latency: 99.04 ms (jitter: 0.25ms, low: 98.75ms, high: 99.35ms)
Download: 1300.75 Mbps (data used: 2.1 GB)
152.74 ms (jitter: 49.63ms, low: 99.67ms, high: 198.48ms)
Upload: 812.52 Mbps (data used: 1.4 GB)
153.32 ms (jitter: 51.94ms, low: 100.32ms, high: 235.41ms)
Packet Loss: 0.0%
Server: Frontier - Chicago, IL (id: 14228)
ISP: Aruba Broadband
Idle Latency: 119.44 ms (jitter: 0.12ms, low: 119.37ms, high: 119.56ms)
Download: 1897.86 Mbps (data used: 2.7 GB)
179.88 ms (jitter: 58.42ms, low: 119.01ms, high: 370.10ms)
Upload: 701.50 Mbps (data used: 1.1 GB)
183.73 ms (jitter: 59.39ms, low: 118.90ms, high: 267.91ms)
Packet Loss: 0.0%
Server: University of Toronto - Toronto, ON (id: 22138)
ISP: Aruba Broadband
Idle Latency: 117.18 ms (jitter: 0.32ms, low: 116.97ms, high: 117.54ms)
Download: 1377.30 Mbps (data used: 2.2 GB)
174.30 ms (jitter: 56.92ms, low: 116.96ms, high: 232.63ms)
Upload: 698.05 Mbps (data used: 904.3 MB)
179.07 ms (jitter: 58.62ms, low: 117.39ms, high: 258.91ms)
Packet Loss: 0.0%
wget -O /dev/null http://speedtest.ams2.nl.leaseweb.net/10000mb.bin
/dev/null 100%[=======>] 9,77G 151MB/s in 70s
2025-12-12 18:57:17 (142 MB/s) - «/dev/null» salvato [10485760000/10485760000]

Rampa per andare alla velocità di regime più lenta rispetto ai risultati precedenti ma poi la velocità rimane costante.
A cosa può essere dovuto questo tempo superiore per raggiungere il regime?
wget -O /dev/null https://mil.download.datapacket.com/10000mb.bin
/dev/null 100%[========>] 9,31G 246MB/s in 40s
2025-12-12 19:00:52 (239 MB/s) - «/dev/null» salvato [10000000000/10000000000]

Direi ottimo.
Facendo invece dei test di download e upload contemporanei di file e speedtest le performance vengono sempre penalizzate:


E' un comportamento corretto?
A cosa è dovuto? Limite dell'ONT? Limiti banda aggregata download + upload impostati da qualche parte es. OLT, BNG, ecc...?
Oppure la causa o il collo di bottiglia potrebbe essere da cercare da qualche parte tra mio PC, Adattatore USB-Ethernet e Router?