NVIDIA Docs Hub NVIDIA Networking Networking Software Adapter Firmware NVIDIA ConnectX-8 SuperNIC Firmware Release Notes v40.45.1200 Known Issues

Known Issues

VF Network Function Limitations in SR-IOV Legacy Mode & 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)

ConnectX-8 has the same feature set and limitations as ConnectX-7 adapter card. For the list of ConnectX-7 Known Issues, please go to https://docs.nvidia.com/networking/software/adapter-firmware/index.html#connectx-7.

The below are limitations related to ConnectX-8 only.

Internal Ref.	Issue
4412310	Description: Split operation (port splitting) on the second port is not supported on the ConnectX-8 SuperNIC model 900-9X81Q-00CN-ST0.
	Workaround: N/A
	Keywords: Port splitting
	Detected in version: 40.45.1020
4394475	Description: The existing congestion control configuration applies globally, rather than on a per-priority basis.
	Workaround: Ensure that the configuration values for all priorities are aligned in either `mlxconfig ROCE_CC_PRIO_MASK_P$port` or `sysfs ecn/roce_rp/enable/$port`.
	Keywords: Congestion control, ROCE_CC_PRIO
	Detected in version: 40.45.1020
4366117	Description: Configuring a small MTU leads to fragmentation of packets critical for the PXE boot process. As a result, the PXE boot filters mistakenly discard these packets, causing the PXE boot to fail.
	Workaround: If this capability is not disabled by default on your adapter cards (`pxe_boot_filter_en=1/TRUE` in the bios HII), take the following actions: Reduce the TFTP block size to a value that prevents packet fragmentation. Manually disable the PXE filter.
	Keywords: PXE boot filters
	Detected in version: 40.45.1020
4240828	Description: Simultaneous access to the same PDDR module info page is not supported.
	Workaround: N/A
	Keywords: PDDR module
	Detected in version: 40.45.1020
4318063	Description: When running the PTP4L application, the path delay displays inconsistent values after each fwreset and rerun, resulting in a non-constant PPS offset that fails to meet Class B/C requirements.
	Workaround: Manually perform a port link reset after fwreset.
	Keywords: PTP
	Detected in version: 40.45.1020
4163634	Description: When connecting a Quantum-3 switch system (with a port split into 8 ports) to a ConnectX-8 single port SuperNIC, the link will not be established.
	Workaround: Configure the Quantum-3 switch system port to be split into 2 or 4 ports, or set the ConnectX-8 to operate in multiplane mode.
	Keywords: Port split, Quantum-3
	Detected in version: 40.44.0212
4230775	Description: Due to a known issue, telemetry rate must be set to lower than 3 minutes.
	Workaround: N/A
	Keywords: Telemetry rate
	Detected in version: 40.44.0212
4230775	Description:
	Workaround: N/A
	Keywords:
	Detected in version: 40.44.0212
4208960	Description: A packet may be parsed incorrectly, if a driver uses the `header_length_field_mask` when creating a `PARSE_GRAPH_NODE` object, and the mask value is not composed of continuous bits or does not commence at the least significant bit.
	Workaround: Insert the `header_length_field_mask` with continuous bits and commence at the least significant bit.
	Keywords: PARSE GRAPH NODE, Flex Parser
	Detected in version: 40.44.0208
4201405	Description: Upgrading to firmware 40.44.0xxx from any previous Engineering Sample version requires power cycling the driver and not just resetting it (using mlxfwreset).
	Workaround: N/A
	Keywords: Upgrade, power cycle, reset
	Detected in version: 40.44.0208