Hello
Avec l'ONT et mon routeur Ubiquiti Cloud Gateway Fiber, il y a un outil ISP speedtest dans l'UX pour tester le debit depuis le routeur, qui semble cappé à 5Gbps.
Pourtant je suis connecté au port RJ45 qui supporte 10Gbps et la négociation affiche bien 10Gbps.
D'après mes recherches l'ONT négocie en 1 ou 10Gbps, mais pas 5Gbps de toute façon.
Sans l'ONT, la prise fibre optique en direct sur la Bbox et mon ordi sur le port 10G me permet d'atteindre presque 8Gpbs sur speedtest.
Est-ce que ceux qui ont cet ONT peuvent me confirmer avoir leur 8Gbps svp ?
EDIT 14 janvier 2026:
En me connectant en SSH sur mon routeur Cloud Gateway Fiber, voici un exemple d'iPerf3 (comme je suis bridé à 1Gbps en upload, je fais un test descendant uniquement) :
iperf3 -c poi.bbr.iperf.bytel.fr -p 9201 -R
Connecting to host poi.bbr.iperf.bytel.fr, port 9201
Reverse mode, remote host poi.bbr.iperf.bytel.fr is sending
[ 5] local 2001:..... port 40194 connected to 2001:864:f00b::3:1 port 9201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 509 MBytes 4.27 Gbits/sec
[ 5] 1.00-2.00 sec 536 MBytes 4.50 Gbits/sec
[ 5] 2.00-3.00 sec 544 MBytes 4.56 Gbits/sec
[ 5] 3.00-4.00 sec 544 MBytes 4.56 Gbits/sec
[ 5] 4.00-5.00 sec 544 MBytes 4.56 Gbits/sec
[ 5] 5.00-6.00 sec 543 MBytes 4.55 Gbits/sec
[ 5] 6.00-7.00 sec 538 MBytes 4.51 Gbits/sec
[ 5] 7.00-8.00 sec 543 MBytes 4.55 Gbits/sec
[ 5] 8.00-9.00 sec 549 MBytes 4.60 Gbits/sec
[ 5] 9.00-10.00 sec 523 MBytes 4.39 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.01 sec 5.26 GBytes 4.51 Gbits/sec 277 sender
[ 5] 0.00-10.00 sec 5.25 GBytes 4.51 Gbits/sec receiver
iperf Done.
EDIT 15 janvier 2026:
Bien qu'une 1ère réponse du support Ubiquiti pointait plutôt vers un problème de mes autres appareils ( ONT, ordi ), après escalation et pointé une autre réponse du SAV publiée sur Reddit, le support a en effet indiqué:
« Hi,
Hope you are doing well! I am Harris from the UniFi Routing & Switching Escalation team, and I will continue to assist you.
Based on our review and your observations, the behavior you are seeing is expected and related to how the UniFi gateway handles traffic distribution across CPU cores. A single large TCP connection, often called an “elephant flow”, is processed by a single CPU core. This means that the throughput for one flow is limited by that core’s capacity, even though the gateway has multiple cores available.
In contrast, multi-core routing distributes multiple flows across several cores, which is why you see higher overall throughput when multiple simultaneous connections are active. For example, total throughput across multiple clients or concurrent streams will typically approach full line rate.
A few additional points to note:
For inter-VLAN routing, using a Layer 3 switch is recommended to maximize total performance and reduce CPU load on the gateway.
There is a known difference in single-core performance between download and upload traffic, where upload tends to perform slightly better.
Our team is actively working on improving single-core download performance in upcoming version releases, although this will not impact upload behavior.
We appreciate the time you have taken to test and share results, and your feedback has been very valuable to our ongoing optimization efforts.
If you have any further queries/Issues, please feel free to reach out.
Best,
Harris P.
Ubiquiti Inc. »