The bandwidth of VM aggregation is too low On VirtualBox

[kuoxinxin]

Expected Behavior

The bandwidth of the Macbook speed test is the same as that of the Host OS.

Current Behavior

Action 1:

1. On the hostOS, start the OpenMPTCProuter guestOS;
2. Configure 3 Mobile SIM network adapters on the guestOS as eth1, eth2, and eth3;
3. On the hostOS, use speedtest-cli to test the speed: [Network]-[MPTCP]-[Bandwidth]-[Download] show the result： eth1(master): 47.88Mbps; eth2: 28.46Mpbs; eth3: 29.44Mbps; Total: 102.17Mbps;

Speedtest-cli download result: 92.05Mpbs.

Action 2:

1. On the hostOS, start the OpenMPTCProuter guestOS;
2. Configure 3 Mobile SIM devices network adapters on the guestOS as eth1, eth2, and eth3;
3. Use a Macbook to connect to eth0 of the host through a network cable, and obtain a dynamic IP address through OMR;
4. On your Macbook, use speedtest-cli for speed test: [Network]-[MPTCP]-[Bandwidth]-[Download] show the result: eth1(master): 83.36Mbps; eth2: 21.78Mpbs; eth3: 23.85Mbps; Total: 141.32Mbps;

Speedtest download result: 0.76Mpbs.

Details:

Host OS speed

MacBook speed

[Ysurac]

So you seems to aggregate correctly on both case but speed displayed in speedtest seems slower ? Really strange result... Your MacBook is connected via ethernet or wifi ? Can you try same test with nperf.com if you can find a good server ?

[kuoxinxin]

So you seems to aggregate correctly on both case but speed displayed in speedtest seems slower ？ Yes, it is. Using the same speedtest node, Macbook speedtest is too different from the host test.

Your MacBook is connected via ethernet or wifi? My MacBook connects to omr via ethernet.

Can you try same test with nperf.com if you can find a good server ? I use nperf.com to test bandwidth, but I can't select the Chinese mainland node in the test, I can only use the HK node, and the test result is as follows: Macbook test: download: 2.487 Mbps HostOS test: download: 20.42Mbps remark：the main reason for the low efficiency of the host bandwidth is that the node does not belong to China mainland node.

In addition to speedtest-cli, I use [https://www.speedtest.cn/] to test bandwidth. result as follow: Macbook test download bandwidth: 3.17Mbps HostOS test download bandwidth: 113.77Mbps

[Ysurac]

Do you have another device than a Mac to test ? I don't know if the problem is on the mac end or on HostOS when something is connected.

[kuoxinxin]

I used an Ubuntu 20.04.6 LTS desktop and the results of the tests were the same.Also, I tested the local network bandwidth with iperf3 as follows: hostOS <--> guestOS bandwidth: (down:1000Mbps; up:1000Mbps); macbook<-->hostOS bandwidth: (down:936Mbps;up:932Mbps) macbook<-->guestos (down:156Kbps;up:4.56Mbps)

From the above tests, it can be seen that OMR on guestOS may have problems with network transmission. What could be the cause of this problem?

[Ysurac]

What is your network configuration in VirtualBox ?

[kuoxinxin]

My Virtualbox network configuration as follows:

eth0:

eth1-3:

usb1,usb2,ubs3 is 3 mobile SIM network adapters.