About vmxnet3

[Kelvin201807]

Hi buddies,

The upper limit of vmxnet3 is 10GB in practice? if vmware can support higher performance?

Thanks in advance.

[SupreetK]

Virtual NICs are just passthru. Depends on the bandwidth of your physical uplinks. Assuming you have a practical bandwidth of 1 Gbps, question is whether your storage is able to support such high network load.

Cheers,

Supreet

[Kelvin201807]

Hi SupreetK,

I add network controll type vmxnet3 when setting up guest OS . When login the guest OS, please check the screenshot, its speed is 10000Mb/s (10Gb/s).

Just want to confirm even if my physical NIC on the esci box is 40Gb/s, the speed of the vmxnet3 show below is still 10Gb/s, while its actual speed will be much higher than 10Gb/s (close to 40Gb/s)?

Appreicate your advice.

[SupreetK · Accepted solution]

VM will show the bandwidth as 10 GBps. However, the actual bandwidth will depend on your uplink speed. A physical CentOS or a Windows installation might show it as 40 GBps but, not the VMs. You will have to perform a bandwidth test to see how much you are getting in actual.

Please consider marking this answer as "correct" or "helpful" if you think your questions have been answered.

Cheers,

Supreet

[HassanAlKak88]

Hello,

kindly find the following: https://blogs.vmware.com/performance/2015/04/network-improvements-vsphere-6-boost-performance-40g-ni...

Network Improvements in vSphere 6 Boost Performance for 40G NICs - VMware VROOM! Blog - VMware Blogs

Please consider marking this answer "CORRECT" or "Helpful" if you think your question have been answered correctly.

Cheers,

VCIX6-NV|VCP-NV|VCP-DC|

@KakHassan

linkedin.com/in/hassanalkak