NVIDIA Docs Hub Homepage NVIDIA Networking Networking Software Adapter Firmware NVIDIA ConnectX-9 SuperNIC Firmware Release Notes v82.48.1000 (February 2026 GA Release) Known Issues

Known Issues

ConnectX-9 has the same feature set and limitations as the ConnectX-8 SuperNIC. For the list of ConnectX-8 known issues, refer to: https://docs.nvidia.com/networking/software/adapter-firmware/index.html#connectx-8.

The limitations listed below apply to ConnectX-9 only.

Internal Ref.	Issue
4835832	Description: In rare cases, certain module types may experience link-up failures.
	Workaround: Configure the requested speed using the following commands: `mlxconfig -d <device> set PHY_RATE_MASK_OVERRIDE_P<port>=1` `mlxfwreset -d <device> r -y --no_mstmlxconfig -d <device> set PHY_RATE_MASK_P<port>=<PTYS.speed_mask> (speed mask is defined in PRM)mlxfwreset -d <device> r -y --no_mst`
	Keywords: Cables
	Detected in version: 82.48.1000
4809493 / 4804815 / 4884845	Description: Running lane margin tests may disrupt traffic, cause connection drops, or degrade performance.
	Workaround: Disable the drivers before starting the Lane Margin test. Set an error threshold of 2. If the connection drops or performance degrades, re-run the process.
	Keywords: Lane Margin
	Detected in version: 82.48.1000
4806964 / 48293338 / 4843305 / 4857738	Description: When bringing up 800G_8x on ConnectX-9 with Spectrum-4 switch systems, switch firmware version xx.201.3916-020 or later is required; earlier versions may fail to link up at 800G_8x.
	Workaround: N/A
	Keywords: Linkup, cables, Spectrum-4, 800G_8x
	Detected in version: 82.48.1000
	Description: 200GbE per lane protocol is currently not supported.
	Workaround: N/A
	Keywords: 200GbE per lane
	Detected in version: 82.48.1000
4745177	Description: Connecting to systems with 25 or 50Gb/s per lane is not supported in the current release.
	Workaround: N/A
	Keywords: NRZ, Connectivity
	Detected in version: 82.48.1000