Slow speed when connecting to Internet with 5Gbit USB dongle [Solved (nofix)]

RouterOS General
1

Dear all,

My fiber box speed is 2.5gbit download and 700mbit upload.
I am using Debian GNU/Linux on my laptop with an embedded 1Gbit network and 5Gbit USB3 dongle.

I use a CCR2004-1G-12S+2XS router with a CRS312-4C+8XG switch.
All devices are connected to the CRS312 configured as a switch and the CCR2004 as a router.
All running RouterOS 7.1 rc5 (same was happening with previous RC releases).
MTU is 1500 on all devices.

When connecting from a Synology NAS, I can reach fiber speed:
iperf3 -R -p 5205 -c ping.online.net

Connecting to host ping.online.net, port 5205
Reverse mode, remote host ping.online.net is sending

[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 2.54 GBytes 2.18 Gbits/sec 7 sender
[ 5] 0.00-10.00 sec 2.53 GBytes 2.18 Gbits/sec receiver

However, when using my laptop with USB 5Gbit dongle, I can only reach slow speed:

iperf3 -R -p 5205 -c ping.online.net
Connecting to host ping.online.net, port 5205
Reverse mode, remote host ping.online.net is sending
[ 5] 8.00-8.62 sec 11.1 MBytes 150 Mbits/sec

To reach download speed, I need to query 10 threads simultaneously:

iperf3 -R -P 10 -p 5205 -c ping.online.net
Connecting to host ping.online.net, port 5205
Reverse mode, remote host ping.online.net is sending
[SUM] 0.00-10.00 sec 2.39 GBytes 2.05 Gbits/sec 9422 sender
[SUM] 0.00-10.00 sec 2.38 GBytes 2.04 Gbits/sec receiver

However, I can reach 2.19 Gbit on one thread on local network, so the USB3 5gbit dongle is working.

iperf3 -R -c 10.90.40.4
Connecting to host 10.90.40.4, port 5201
Reverse mode, remote host 10.90.40.4 is sending

[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 2.55 GBytes 2.19 Gbits/sec 1984 sender
[ 5] 0.00-10.00 sec 2.54 GBytes 2.19 Gbits/sec receiver

If I connect using the embedded 1Gbit RJ-45 on my laptop, I can reach 1Gbit download.

iperf3 -R -p 5205 -c ping.online.net
Connecting to host ping.online.net, port 5205
Reverse mode, remote host ping.online.net is sending

[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 1.09 GBytes 939 Mbits/sec 1001 sender
[ 5] 0.00-10.00 sec 1.09 GBytes 933 Mbits/sec receiver

Connecting to the Internet using the USB3 5gbit dongle is tremendously slow and I would like to understand why.
At first, I suspected the USB3 dongle, but it is working as expected as I can iperf3 the local NAS.

So how can I debug to see what is going on?

Kind regards,
FF

2

To be honest, USB networking has never been very fast or reliable. It’s very much up to the quality of the driver and the USB controller.

3

testing shows that the USB3 dongle is limited to 3.5gbit. It is also quite unstable.
As written before, this kind of hardware is not suited to elaborate an analysis, so I am stopping here.

4

Did you try and disable “Auto Negotiation” ?

5

Good point, thanks.
Speed was negotiated automatically at 5Gb.
I will test with 2.5 Gb and report.

6

Good point, thanks.
Speed was negotiated automatically at 5Gb.
I will test with 2.5 Gb and report.
I think I will disable 5Gb to allow 2.5Gb and 1Gb speeds.

7

I connected at 2.5Gb speed autonegociation and the results in downloading are still bad:

iperf3 -R -p 5209 -c ping.online.net
Connecting to host ping.online.net, port 5209
Reverse mode, remote host ping.online.net is sending
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 92.0 MBytes 77.2 Mbits/sec 441 sender
[ 5] 0.00-10.00 sec 91.7 MBytes 77.0 Mbits/sec receiver

However, the results in uploading are good (I have 700Mbit upload):

iperf3 -p 9220 -c paris.testdebit.info
Connecting to host paris.testdebit.info, port 9220
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 805 MBytes 676 Mbits/sec 4 sender
[ 5] 0.00-10.02 sec 803 MBytes 673 Mbits/sec receiver

I am giving up with those USB dongles.

Downloading with the Intel gigabit Ethernet RJ-45 is 1Gb/s.

8

Qnap indicates that to reach 5Gb/s it is recommended to set jumbo frames with MTU 9000.
https://www.qnap.com/en-us/product/qna-uc5g1t

Does it sound reasonable?

here is the kernel information:
odinfo aqc111
filename: /lib/modules/5.10.0-8-rt-amd64/kernel/drivers/net/usb/aqc111.ko
license: GPL
description: Aquantia AQtion USB to 5/2.5GbE Controllers
alias: usb:v1C04p0015ddcdscdpic02isc06ip00in*
alias: usb:v1C04p0015ddcdscdpicFFiscipin*
alias: usb:v20F4pE05Addcdscdpic02isc06ip00in*
alias: usb:v20F4pE05AddcdscdpicFFiscipin*
alias: usb:v0B95p2791ddcdscdpic02isc06ip00in*
alias: usb:v0B95p2791ddcdscdpicFFiscipin*
alias: usb:v0B95p2790ddcdscdpic02isc06ip00in*
alias: usb:v0B95p2790ddcdscdpicFFiscipin*
alias: usb:v2ECApC101ddcdscdpic02isc06ip00in*
alias: usb:v2ECApC101ddcdscdpicFFiscipin*
depends: usbnet,usbcore
retpoline: Y
intree: Y
name: aqc111
vermagic: 5.10.0-8-rt-amd64 SMP preempt_rt mod_unload modversions
sig_id: PKCS#7
signer: Debian Secure Boot CA
sig_key: 4B:6E:F5:AB:CA:66:98:25:17:8E:05:2C:84:66:7C:CB:C0:53:1F:8C
sig_hashalgo: sha256
signature: 5E:BD:CD:64:11:70:24:9A:1C:EF:2C:1A:9E:15:34:A1:CA:B5:CB:FC:
CE:3F:A6:12:8A:13:19:25:F2:E7:E4:02:DB:65:1D:CA:07:1D:1C:50:
A7:E3:C3:26:AC:25:09:BF:C3:AD:A9:50:C5:8E:42:59:7E:D2:1C:D6:
9D:3D:70:E8:A0:04:92:99:1E:77:78:74:46:7A:7E:62:99:B5:26:62:
56:8A:EB:E8:D9:95:28:BE:26:E4:2C:F0:ED:BB:E5:92:2E:E0:0C:CD:
28:52:07:33:43:E2:BB:C8:D0:00:29:E7:8B:5D:85:F2:6F:CA:9D:24:
70:FF:72:B3:D2:56:36:05:C1:75:97:66:44:D8:89:C4:18:31:0F:2A:
57:E7:44:74:23:2C:59:C6:56:F9:4A:8A:B3:10:B3:47:C8:E6:EE:F7:
02:54:69:80:5F:78:68:01:21:47:45:E9:27:01:69:65:1B:C7:A6:D8:
22:43:13:B1:93:84:4A:55:A8:72:9C:59:1C:22:89:DE:0D:ED:E8:CC:
36:F6:7F:C2:A8:64:2A:C7:BB:5B:86:1C:85:EE:F8:3C:1D:B4:35:C5:
42:21:C2:95:B5:35:67:C5:C3:95:24:13:E4:B4:15:8A:0D:8D:00:82:
9E:52:CA:E9:BA:CB:65:9D:B7:FB:6E:BA:59:33:67:BB

9

Hmmm…
Whats the Model of your USB-Adapter?


At work we use SoNNeT Solo 10 G Thunderbolt 3 adapters
I used them with Mikrotik before , no problems

10

This is a QNAP QNA-UC5G1T USB 3 dongle:
https://www.qnap.com/fr-fr/product/qna-uc5g1t

Unfortunately, I don’t have a thunderbolt interface.
Maybe when I switch laptop…

11

I am no LinuxOS expert …

If this would be a Windows-Laptop , i would

  • Uninstall all AQC111U driver from Marvell
  • Install/Update USB-Drivers for Laptop
  • Reboot
  • Install latest AQC111U driver from Marvell
  • Reconnect Adapter
  • Test again

But i don’t know if Linux sufers from the same problems as Windows =)

12

No this is Debian GNU/Linux.
I never use Windows.

My laptop is a Lenovo x270 with USB 3.1 gen1.
I will get a x280 USB3 gen2 with USB 3.1 gen2 and 40 Gs/s thunderbolt.
This will allow me to use a 10Gb/s thunderbolt to sfp+ with fiber adapter.