Known Issues

NVIDIA ConnectX-5 Adapter Cards Firmware Release Notes v16.35.3502 LTS

The following sections describe known issues in firmware releases and possible workarounds.

Internal Ref.



Description: Currently, on cables that perform polarity inversion there is no link up.

Workaround: N/A

Keywords: Cables, Polarity Inversion

Discovered in Version: 31.2010.3118


Description: In some cases, MMS4X00-NL1.2 may have low BER.

Workaround: N/A

Keywords: Signal Integrity

Discovered in Version: 31.2010.2110


Description: Using NDR speed with Optical Transceivers causes bandwidth to be 350Gb/s instead of 400Gb/s in small packets.

Workaround: N/A

Keywords: Optical Transceivers

Discovered in Version: 31.2010.1310


Description: When using Optical Transceiver, toggling a port in a cage may toggle the adjacent port in the cage.

Workaround: N/A

Keywords: Optical Transceivers, Port Toggle

Discovered in Version: 31.2010.1310


Description: VL_HIGH_LIMIT is not affecting the VL arbiter as expected.

Workaround: Arbitration table should be set using only the low priority VL arbitration table.

Keywords: VL Arbitration

Discovered in Version: 31.2010.1310


Description: Configuring weight "0" for VL, results in unexpected behavior.

Workaround: Arbitration table should be configured with weights other than "0".

Keywords: VL Arbitration

Discovered in Version: 31.2010.1310


Description: Congestion profiles in VS-MAD PortProfileSetting support only fixed mode. Percentage mode is not supported.

Workaround: N/A

Keywords: InfiniBand Congestion Control

Discovered in Version: 31.2010.1310

Unsupported Features

Features that are not yet supported in the NVIDIA Quantum-2 systems:

  • IB Router

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