This Ndv2 page[1] mentions that the 4.7-1.0.0.1 Mellanox OFED driver is what should be used when enabling infiniband on Standard_ND40rs_v2 VMs. However the ubuntu-hpc 18.04 images come pre-installed with v4.9-3.1.5.0 [2], and 20.04 images pre-installed come with v5.6-1.0.3.3 [3].
Problem – Is there a way to safely downgrade the Mellanox OFED driver without corrupting (or causing mismatches with) existing drivers? I have successfully tried uninstalling the pre-installed version. But when I try to install v4.7-1.0.0.1, i get the following error message (i have also attached the log file232050-mlnx.log):
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SOLUTION
From the details and error shared, the mlnx.log shows a build error (Failed to build mlnx-ofed-kernel DEB).
The NDv2 series supports latest OFED version. Please use “5.6-1.0.3.3” version of MOFED.
There are two Ubuntu HPC 18.04 images
- 18.04 image that supports MOFED LTS version 4.9-3.1.5.0 suitable for CX3-pro cards
- 18.04 image that is suitable for NDv2/ NDv4/ NCv4 and it has MOFED 5.6-1.0.3.3 installed.
Please refer to this link for installation steps. Additionally, you can use Ubuntu HPC 18.04 image directly (microsoft-dsvm:ubuntu-hpc:1804:latest) on an NDv2 SKU.
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