# Installing DOCA 3.7 on ubuntu - no DPU interfaces

**URL:** <https://forums.developer.nvidia.com/t/installing-doca-3-7-on-ubuntu-no-dpu-interfaces/191170>\
**Category:** Getting Started & Resources\
**Created:** [October 4, 2021, 3:27pm UTC](https://forums.developer.nvidia.com/t/installing-doca-3-7-on-ubuntu-no-dpu-interfaces/191170 "2021-10-04T15:27:38Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![monty.mcgraw](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@monty.mcgraw](https://forums.developer.nvidia.com/u/monty.mcgraw)\
**Post date:** [October 4, 2021, 3:27pm UTC](https://forums.developer.nvidia.com/t/installing-doca-3-7-on-ubuntu-no-dpu-interfaces/191170/1 "2021-10-04T15:27:38Z")

</div>

I followed the DPU Installation Guide for v3.7 using Ubuntu 20.0.4 on the server with BF2 and installed SDKManager and used it to update the host and DPU. When it completed, I can see that the DPU has Port1 and OOB connectivity - but the host has lost all connectivity. And an OS error message pops up that netplan script is corrupt…

I think I have run into a known SDK release note issue:  
27301  
57  
Description: Kernel upgrade is not currently supported on BlueField as there are out of tree kernel modules (e.g., ConnectX drivers that will stop working after kernel upgrade).

Workaround: Kernel can be upgraded if there is a matching DOCA repository that includes all the drivers compiled with the new kernel or as a part of the new BFB package.

Keywords: Kernel; upgrade  
Discovered in version: 3.7.0

I fixed the host network connectivity by having netplan generate a new config file - but that file only has one embedded host NIC and the tmfifo NIC.

I don’t see any instructions to follow the release note workaround. It sounds like the BF2 host drivers need to be rebuilt with the current kernel.

How do I do that?

---

<div class="post-metadata">

**Author:** ![jubetz](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/jubetz/32/14047_2.png) [@jubetz](https://forums.developer.nvidia.com/u/jubetz)\
**Post date:** [November 17, 2021, 7:38pm UTC](https://forums.developer.nvidia.com/t/installing-doca-3-7-on-ubuntu-no-dpu-interfaces/191170/2 "2021-11-17T19:38:41Z")

</div>

Hi Monty, have you made any progress on this? I’ve never heard of issues with an SDKManager install that produces this problem, but I’d recommend trying a manual install and ensure that you perform the steps to reset the nvconfig params: `sudo mlxconfig -d /dev/mst/<device> -y reset` and then also that the firmware is up to date (on the DPU you run `sudo /opt/mellanox/mlnx-fw-updater/mlnx_fw_updater.pl`)

The complete manual installation steps are here in our guide: [Installation Guide :: NVIDIA DOCA SDK Documentation](https://docs.nvidia.com/doca/sdk/installation-guide/index.html#qsg)

---

<div class="post-metadata">

**Author:** ![monty.mcgraw](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@monty.mcgraw](https://forums.developer.nvidia.com/u/monty.mcgraw)\
**Post date:** [November 17, 2021, 7:51pm UTC](https://forums.developer.nvidia.com/t/installing-doca-3-7-on-ubuntu-no-dpu-interfaces/191170/3 "2021-11-17T19:51:14Z")

</div>

Justin, yes I reinstalled following the installation guide and problem was resolved. Thanks!