Known Issues

4970263 / 4989004

Description: A high-temperature assert may be reported only the first time the chip reaches the thermal threshold.

Workaround: N/A

Keywords: Temperature

Detected in version:

82.49.1014

4983905

Description: NVConfig TLV read operations may fail due to a flash access timeout.

Workaround: N/A

Keywords: NVConfig TLV read operations

Detected in version:

82.49.1014

5025449 / 5056985

Description: H-RH8ENH-NGL does not support the precoding preference CDB, so precoding is disabled by default.

Workaround: To bring up the link, manually enable precoding.

Keywords: Precoding

Detected in version:

82.50.1002

5234743 / 5145460

Description: Query Port Telemetry v2 (CMD 0x14) reports tag 0x20 (rx_los_mask), which should not be populated.

Workaround: N/A

Keywords: Query Port Telemetry v2

Detected in version:

82.50.1002

5234750

Description: The Plug Voltage sensor does not read the value from the second module.

Workaround: N/A

Keywords: Plug Voltage sensor

Detected in version:

82.50.1002

5226500

Description: For STC PACKET_OP, immediate ICRC recalculation is supported only when the reparse bit is enabled. If ICRC recalculation is requested without enabling reparse, the resulting ICRC may differ from the expected value.

Workaround: Enable STC PACKET_OP reparse whenever ICRC recalculation is requested.

Keywords: STC PACKET_OP, ICRC recalculation

Detected in version:

82.50.1002

5230758 / 4553130 / 5231785

Description: For LPO cables, link-up may fail after the port on the peer device is toggled.

Workaround: Toggle the port on the SuperNIC side.

Keywords: LPO cables

Detected in version:

82.50.1002

4901395 / 4919262

Description: When PXE is enabled for both Legacy (FlexBoot) and UEFI drivers, the UEFI driver supports only a single TFTP session after the DHCP handshake.

Workaround: For scenarios that require multiple concurrent TFTP sessions, disable PXE filters via the HCA HII menu.

Keywords: PXE, Filter enabled, UEFI

Detected in version: 82.48.1000

5072222

Description: In DirectNIC and SocketDirect topologies, PCIe TLP Analyzer visibility is limited to the host’s management domain. Traffic passing through an unmanaged host link, such as a DirectNIC connection to a GPU, is not visible to the local tracer.

Workaround: N/A

Keywords: PCIe TLP Analyzer

Detected in version: 82.49.1014

4893639

Description: Direct Memory Access (DMA) protection is not supported in the ipxe.efi driver.

Workaround: N/A

Keywords: DMA

Detected in version: 82.49.1014

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_mst
mlxconfig -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: 

1. Disable the drivers before starting the Lane Margin test.

2. Set an error threshold of 2. 

3. If the connection drops or performance degrades, re-run the process.

Keywords: Lane Margin

Detected in version: 82.48.1000

4806964 / 4829338 / 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