KVM Windows Connection Problems

[sozie]

Hello,

I'm asking for your help, because I'm sincerely lost.

With a Windows KVM, I have 200-400Mbps instead of 1Gbps. My connection is perfect on the LXC, but on my KVM, despite all the options I could change :
- Network card
- Firewall disabled
- Drivers reinstalled, and up to date
- IP configuration correct

I still have an abnormal connection. On the main NODE, no problem, the speed is 1Gbps. What bothers me a bit is that I will soon be able to upgrade to 10Gbps. So it's a bit annoying to be stuck on 400Mbps.

Thanks in advance,
Rémi.

 

[Moayad]

Hi,

- Have you tested another OS (like Linux) and how tested it?

- How is your Windows VM config look like?

- Could you please post your network configuration (cat /etc/network/interfaces) also the output of pveversion -v as well

 

[sozie]

Hello,

I'm sorry for the delay in responding. I have been very busy the last few weeks.

Here is the information requested:

- Have you tested another OS (like Linux) and how tested it?
Yes, I even know someone who has the same problem as me (Debian, Pfsense, ..)

- How is your Windows VM config look like?

- Could you please post your network configuration (cat /etc/network/interfaces) also the output of pveversion -v as well

root@node1:~# pveversion -v
proxmox-ve: 6.4-1 (running kernel: 5.4.106-1-pve)
pve-manager: 6.4-4 (running version: 6.4-4/337d6701)
pve-kernel-5.4: 6.4-1
pve-kernel-helper: 6.4-1
pve-kernel-5.4.106-1-pve: 5.4.106-1
pve-kernel-5.4.73-1-pve: 5.4.73-1
ceph-fuse: 12.2.11+dfsg1-2.1+b1
corosync: 3.1.2-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: residual config
ifupdown2: 3.0.0-1+pve3
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.20-pve1
libproxmox-acme-perl: 1.0.8
libproxmox-backup-qemu0: 1.0.3-1
libpve-access-control: 6.4-1
libpve-apiclient-perl: 3.1-3
libpve-common-perl: 6.4-2
libpve-guest-common-perl: 3.1-5
libpve-http-server-perl: 3.2-1
libpve-storage-perl: 6.4-1
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.6-2
lxcfs: 4.0.6-pve1
novnc-pve: 1.1.0-1
proxmox-backup-client: 1.1.5-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.5-3
pve-cluster: 6.4-1
pve-container: 3.3-5
pve-docs: 6.4-1
pve-edk2-firmware: 2.20200531-1
pve-firewall: 4.1-3
pve-firmware: 3.2-2
pve-ha-manager: 3.1-1
pve-i18n: 2.3-1
pve-qemu-kvm: 5.2.0-6
pve-xtermjs: 4.7.0-3
qemu-server: 6.4-1
smartmontools: 7.2-pve2
spiceterm: 3.1-1
vncterm: 1.6-2
zfsutils-linux: 2.0.4-pve1

Thank you for your help.

Sincerely,
Rémi.

 

[Moayad]

Hello,

Can you share how you tested the network performance, which tool are you used for the testing?

 

[sozie]

Hello,

I performed the tests with SpeedTest and nPerf on 10Gbps servers and a 40Gbps server.

 

[Moayad]

Could you please test it using the iperf3 tool?

 

[sozie]

With iperf3 I can reach 10Gbps on the node. Same for the LXC. On the other hand, 300Mbps-400Mbps on the KVM.

 

[sozie]

UP ?