Is RDMA enabled by default of Azure Stack HCI?

Question

Is RDMA enabled by default of Azure Stack HCI?
Because I can’t find any RDMA setting in the https://learn.microsoft.com/en-us/azure-stack/hci/deploy/create-cluster-powershell

Answer 1

Hey,

I think it is more of a question to Network adapters you are using. You should install proper drivers of the NICs. Usually with drivers installations RDMA will be enabled by default. As an example: https://www.chelsio.com/wp-content/uploads/resources/s2d-hci-quickstartguide.pdf

You can use the following article to verify RDMA connection. https://learn.microsoft.com/en-us/windows-server/networking/technologies/conv-nic/cnic-app-troubleshoot

In addition StarWind rPerf tool can be used to verify RDMA throughput. https://www.starwindsoftware.com/blog/starwind-rperf-all-in-one-free-tool-for-ensuring-the-maximum-performance-level-of-your-rdma-network-connections

Cheers,

Alex Bykovskyi

StarWind Software

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Answer 2

Hi,

Apologies for the delay. It does appear RDMA is automatically enabled from the OS perspective. I confirmed this in my lab by running the Get-NetAdapterRdma cmdlet and verifying the 'Enabled' column listed 'True' next to the appropriate adapters. The dedicated management adapter should have RDMA disabled.

Best Regards,
Trent

Answer 3

I second to what Trent said. To add, it also depends upon the capability of the NIC driver whether it supports it or not and what version of RDMA (RoCE or iWARP or Both) is supported.

Answer 4

To Validate the RDMA on Azure Stack HCI cluster I can recommend to review the docs:
https://learn.microsoft.com/en-us/azure-stack/hci/deploy/validate