Hello!

 

I am experiencing some odd network speeds from a Windows 10 VM hosted on UNRAID. I can't seem to narrow down what is going on.  I have tried multiple Windows 10 configurations with similar results. I also searched all threads I could find without any solution.  Has anyone run across this and knows how to resolve it?

There appears to be 2 separate issues but they may be related.

 

Issue #1: Windows 10 VMs network performance is dramatically slower in an IPERF test to the UNRAID server when compared to an equivalent UBUNTU VM.

 

Issue #2: Internet speed tests with VMS (UBUNTU or UNRAID) is significantly slower than expected.

 

 

M/B: Hewlett-Packard - 0AECh
CPU: 2x Intel® Xeon® CPU X5660 @ 2.80GHz
HVM: Enabled
IOMMU: Enabled
Cache: 384 kB, 1536 kB, 12288 kB
Memory: 64 GB (max. installable capacity 96 GB)
Network: eth0: 10000 Mb/s, full duplex, mtu 1500 
Kernel: Linux 4.18.20-unRAID x86_64
OpenSSL: 1.1.1a

 

IPERF Command used: iperf3 -c TOWER -i 1 -t 30

 

Windows 10 Bare Metal Configuration comparison only:

• i-7 8700K 3.7Ghz
• 16 GB Ram
• 10 Gbps Mellanox ConnectX-2

SpeedTest.net results

• Download: 788
• Upload: 797
• Ping: 0

Iperf summary:

• [ ID] Interval           Transfer     Bandwidth
• [  4]   0.00-30.00  sec  22.4 GBytes  6.42 Gbits/sec                  sender
• [  4]   0.00-30.00  sec  22.4 GBytes  6.42 Gbits/sec                  receiver

 

Unraid Windows 10 VM configuration:

• VM is on a SSD outside of array
• Network Drive: Red Hat,. Inc
• Driver Date: 8/3/2018
• Driver Version: 100.76.104.16000
• 10 vCPU
• 8 GB ram
• Network Bridge: br0 / 10 Gbps Mellanox ConnectX-2

SpeedTest.net results

• Download: 85
• Upload: 490
• Ping: 1

Iperf summary:

• [ ID] Interval           Transfer     Bandwidth
• [  4]   0.00-30.01  sec  9.53 GBytes  2.73 Gbits/sec                  sender
• [  4]   0.00-30.01  sec  9.53 GBytes  2.73 Gbits/sec                  receiver

 

Unraid Ubuntu VM configuration:

• VM is on a SSD outside of array
• 8 vCPU
• 8 GB ram
• Network Bridge: br0 / 10 Gbps Mellanox ConnectX-2

SpeedTest.net results

• Download: 405
• Upload: 351
• Ping: 3

Iperf summary:

• [ ID] Interval           Transfer     Bandwidth
• [  4]   0.00-30.00  sec  27.1 GBytes  7.77 Gbits/sec                  sender
• [  4]   0.00-30.00 sec  27.1 GBytes  7.77 Gbits/sec                  receiver

 

 

tower-diagnostics-20190112-1435.zip

Edited January 12, 20197 yr by cyberd

Probably will need to post the Diagnostics file from the server to get details...

15 hours ago, Warrentheo said:

Probably will need to post the Diagnostics file from the server to get details...

Good point. Added to the original topic.

 

Thanks!

I'm afraid your setup is too complicated for me to make sense of personally 😞

 

From my reading, my current best guess is something to do with the routing in your setup...  Sorry I couldn't help more...