NVIDIA Docs Hub Homepage NVIDIA Networking Networking Software Adapter Firmware NVIDIA ConnectX-6 DE Adapter Cards Firmware Release Notes v22.43.4100 LTS (2024 LTS U4) Known Issues

Known Issues

VF Network Function Limitations in SRIOV Legacy Mode

Dual Port Device	Single Port Device
127 VF per PF (254 functions)	127

VF Network Function Limitations in Switchdev Mode

Dual Port Device	Single Port Device
127 VF per PF (254 functions)	127

VF+SF Network Function Limitations in Switchdev Mode

Dual Port Device	Single Port Device
127 VF per PF (254 functions) 512 PF+VF+SF per PF (1024 functions)	127 VF (127 functions) 512 PF+VF+SF per PF (512 functions)

Known Issues

ConnectX-6 DE has the same feature set and limitations as ConnectX-6 adapter card. For the list of ConnectX-6 Known Issues, please go to https://docs.nvidia.com/networking/category/connectx6fw.

The below are limitations related to ConnectX-6 DE only.

Internal Ref.	Issue
4402045	Description: When using programmable congestion control instead of hardware-based congestion control, internal loopback traffic is limited to wire speed.
	Workaround: To revert to hardware congestion control and achieve higher bandwidth for internal loopback traffic, use the following command: `mlxconfig -d /dev/mst/mt4127_pciconf0 -y s ROCE_CC_LEGACY_DCQCN=1`
	Keywords: Congestion Control, PCC, HW CC
	Discovered in Version: 22.43.2026
3525865	Description: Unexpected system behavior might be observed if the driver is loaded while reset is in progress.
	Workaround: N/A
	Keywords: Sync 1 reset, firmware reset
	Discovered in Version: 22.39.1002
2878841	Description: Firmware rollback fails for the signature retransmit flow if the QPN field is configured in the mkey (as it only allows the given QP to use this Mkey) as the firmware rollback flow relies on an internal QP that uses the mkey.
	Workaround: N/A
	Keywords: Signature retransmit flow
	Discovered in Version: 22.37.1014
3329109	Description: MFS1S50-H003E cable supports only HDR rate when used as a split cable.
	Workaround: N/A
	Keywords: HDR, split cable, MFS1S50-H003E
	Discovered in Version: 22.36.1010
3200779	Description: Changing dynamic PCIe link width is not supported.
	Workaround: N/A
	Keywords: PCIe
	Discovered in Version: 20.34.1002
-	Description: A wrong device ID is presented When running the “dev_id” command for ConnectX-6 DE. The device ID shown is the ConnectX-6 Dx instead.
	Workaround: To be able to identify the ConnectX-6 DE ID, run one of the commands below: mlxfwmanager mlxvpd (or mlxburn -vpd)
	Keywords: Device ID
	Discovered in Version: 22.32.2306
2850003	Description: Occasionally, when rising a logical link, the link recovery counter is increase by 1.
	Workaround: N/A
	Keywords: Link recovery counter
	Discovered in Version: 22.32.2306