Slow download on Windows 11 VM

[mcfly9]

Hi,

I have proxmox installed on a Dell T630 server and running a few VM's on it.

One VM is a pfsense install with an Intel X520 passed through connected to a 2GBps FTTH link. I also have a VirtIO network adatpter added to the VM connected to vmbr0.
I have an Ubuntu VM connected to vmbr0 and am able to push 2 gbps down and 1gbps up using speedtest CLI on this VM.
I have a Windows Server 2022 Core VM connected to the same vmbr0 and am also able to push 2 gbps down and 1gbps up using speedtest CLI on this VM.

I have a Windows 11 VM (guest agent and drivers installed) also connected to vmbr0 and see that speedtest only does around 150-300mbps down while still being able to push 1gbps up.

What am I missing? What could cause the slowdown on the Win11 box?

 

[Moayad]

Have you tried another network model on the Win 11 VM, e.g., E1000?

Can you provide us with the VM 11 config?

 

[mcfly9]

Have you tried another network model on the Win 11 VM, e.g., E1000?

Can you provide us with the VM 11 config?

Same with the E1000.

Config currently:

agent: 1
bios: ovmf
boot: order=virtio0;ide2;net0
cores: 4
cpu: host
efidisk0: VMDisk:vm-104-disk-0,efitype=4m,pre-enrolled-keys=1,size=4M
ide2: none,media=cdrom
machine: pc-q35-6.2
memory: 8192
meta: creation-qemu=6.2.0,ctime=1652126737
name: admin-ws
net0: e1000=F2:DF:E3:9F:5E:70,bridge=vmbr0,tag=20
numa: 0
onboot: 1
ostype: win11
scsihw: virtio-scsi-pci
smbios1: uuid=9bd1ec4c-f22b-422c-9f82-4ab1b3c24f53
sockets: 1
startup: up=120
tpmstate0: VMDisk:vm-104-disk-1,size=4M,version=v2.0
virtio0: VMDisk:vm-104-disk-2,size=127G
vmgenid: 1ff3b069-da27-4d00-848f-41c40a15f494