Hello,
I am trying to enable LEGACY_DCQCN for my ConnectX-6 NIC by setting the ROCE_CC_LEGACY_DCQCN parameter to 1 using mlxconfig. However, I encountered the following error:
sudo mlxconfig -d /dev/mst/mt4123_pciconf0 s ROCE_CC_LEGACY_DCQCN=0
Device #1:
----------
Device type: ConnectX6
Name: MCX653105A-ECA_Ax
Description: ConnectX-6 VPI adapter card; 100Gb/s (HDR100; EDR IB and 100GbE); single-port QSFP56; PCIe3.0 x16; tall bracket; ROHS R6
Device: /dev/mst/mt4123_pciconf0
Configurations: Next Boot New
-E- The Device doesn't support ROCE_CC_LEGACY_DCQCN parameter
My environment is as follows:
- OS: Ubuntu 24.04
- Kernel: 6.11.0
- MLNX_OFED version: MLNX_OFED_LINUX-24.10-2.1.8.0
- Firmware version: 20.42.1000
Has the ROCE_CC_LEGACY_DCQCN parameter been deprecated in recent OFED versions or firmware? If so, how can I enable LEGACY_DCQCN congestion control mode for RoCE traffic on my ConnectX-6 NIC?
Any guidance or confirmation regarding support for LEGACY_DCQCN in current OFED or firmware versions would be highly appreciated.
Thanks in advance!