Connection (ssh, screen console) to the BlueField is lost
The UART cable in the Accessories Kit (OPN: MBF20-DKIT) can be used to connect to the DPU console and identify the stage at which BlueField is hanging.
Follow this procedure:
Connect the UART cable to a USB socket, and find it in your USB devices.
For more information on the UART connectivity, please refer to the DPU's hardware user guide under Supported Interfaces > Interfaces Detailed Description > NC-SI Management Interface.
It is good practice to connect the other end of the NC-SI cable to a different host than the one on which the BlueField DPU is installed.
Install the minicom application.
Open the minicom application.
- Go to "Serial port setup"
- Enter "F" to change "Hardware Flow control" to NO
- Enter "A" and change to
/dev/ttyUSB0and press Enter
- Press ESC.
- Type on "Save setup as dfl"
Exit minicom by pressing Ctrl + a + z.
Driver not loading in host server
What this looks like in dmsg:
The driver on the host server is dependent on the Arm side. If the driver on Arm is up, then the driver on the host server will also be up.
Please verify that:
- The driver is loaded in the BlueField (Arm)
- The Arm is booted into OS
The Arm is not in UEFI Boot Menu
The Arm is not hanged
- Power cycle on the host server.
If the problem persists, please reset nvconfig (
sudo mlxconfig -d /dev/mst/<device> -y reset), and then power cycle the host.
If your DPU is VPI capable, please be aware that this configuration will reset the link type on the network ports to IB. To change the network port's link type to Ethernet, run:
- If this problem still persists, please make sure to install the latest bfb image and then restart the driver in host server. Please refer to "Upgrading NVIDIA BlueField DPU Software" for more information.
No connectivity between network interfaces of source host to destination device
Verify that the bridge is configured properly on the Arm side.
The following is an example for default configuration:
If no bridge configuration exists, please refer to "Virtual Switch on BlueField DPU".
Uplink in Arm down while uplink in host server up
Please check that the cables are connected properly into the network ports of the DPU and the peer device.