Disable RoCE Processing from Firmware in ConnectX

Infrastructure & Networking DOCA Enterprise Networking
1

Is there a way to completely disable RoCE processing in the firmware of ConnectX .we can avoid roce by un loading mlx5_ib but i doubt it disables processing of RoCEv2 ( udp port 4791 ), this packet should be seen as normal packet to NIC.

2

Hi Palok,

Thanks for writing us.

Yes there is a way you can disable RoCE processing in ConnectX firmware.

You can use this command:

echo 0 > /sys/devices/{pci-bus-address}/roce_enable

Just replace {pci-bus-address} with your actual PCI address.

This will result in:

  • The firmware completely stops treating UDP port 4791 as RoCE traffic

  • Your packets will flow through as normal Ethernet

  • The mlx5_ib driver automatically reloads to match the new state

To make sure it worked you can verify with this command:

cat /sys/devices/{pci-bus-address}/roce_enable

You should get 0

Thanks,

Ilan.

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