NVIDIA BlueField Virtio-net v24.07
NVIDIA BlueField Virtio-net v24.07

Failed to Start virtio-net-controller.service

The problem can be verified using the following commands:

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# virtnet list ERR: Can't connect to virtnet controller: [Errno 111] Connection refused Check 'systemctl status virtio-net-controller' Or controller is not ready to accept commands

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# systemctl status virtio-net-controller ● virtio-net-controller.service - Nvidia VirtIO Net Controller Daemon Loaded: loaded (/etc/systemd/system/virtio-net-controller.service; enabled; vendor preset: disabled) Active: inactive (dead) since Fri 2023-10-27 17:46:59 CDT; 2min 26s ago Docs: file:/opt/mellanox/mlnx_virtnet/README.md Process: 29652 ExecStart=/usr/sbin/virtio_net_manager (code=exited, status=0/SUCCESS) Main PID: 29652 (code=exited, status=0/SUCCESS)

The problem may happen due to the following reasons.

Virtio-net Not Enabled

  1. Check if mlxconfig has VIRTIO_NET_EMULATION_ENABLE enabled:

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    # mlxconfig -d 03:00.0 -e q | grep -i VIRTIO_NET_EMULATION_ENABLE * VIRTIO_NET_EMULATION_ENABLE False(0) True(1) True(1)

    Both 2 and 3 columns should appear as true.

  2. If they are not, perform the following from the BlueField Arm side:

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    # mlxconfig -d 03:00.0 s VIRTIO_NET_EMULATION_ENABLE=1

  3. Perform a BlueField system-level reset as documented in the BlueField software documentation.

Not Enough SFs Reserved

This can happen when more VIRTIO_NET_EMULATION_NUM_PF are reserved than PF_TOTAL_SF, as each virtio-net PF/VF requires a corresponding SF created:

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# mlxconfig -d 03:00.0 -e q | grep -iE 'PF_TOTAL_SF|VIRTIO_NET_EMULATION_NUM_PF' *        VIRTIO_NET_EMULATION_NUM_PF                 0               4               4 *        PF_TOTAL_SF                                 0               8             8

Info

By default, the BlueField creates an SF for each PF. Take this into consideration when reserving PF_TOTAL_SF.


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