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NVIDIA ConnectX-6 Adapter Cards Firmware Release Notes v20.43.2026 LTS

NVIDIA Docs Hub NVIDIA Networking Networking Software Adapter Firmware NVIDIA ConnectX-6 Adapter Cards Firmware Release Notes v20.43.2026 LTS Changes and New Feature History

Changes and New Feature History

Note

This section includes history of 3 major releases back. For older releases history, please refer to the relevant firmware versions.

Feature/Change	Description
20.43.1014
RDMA Telemetry	Added the option to indicate an error CQE event on every selected function per eSwitch manager. This indication is defined as a new WQE including the relevant information about the error (such as: syndrome, function_id, timestamp, QPs num etc.). The feature is configured using a new general object: RDMA-Telemetry object, and depends on the following new caps: `HCA_CAP.rdma_telemetry_notification_types` and `HCA_CAP.rdma_telemetry`.
UID Permissions	Extended kernel lockdown permission set. The following sub-operations can now be called by tools (permission TOOLS_RESORCES) using new HCA capability bitmask field: tool_partial_cap. The 5 sub-operations are: QUERY_HCA_CAP with other function QUERY_VUID with direct data QUERY_ROCE_ADDRESS with other vport SET_HCA_CAP with other function POSTPONE_CONNECTED_QP_TIMEOUT with other vport The new added caps are: tool_partial_cap.postpone_conn_qp_timeout_other_vport, tool_partial_cap.set_hca_cap_other_func tool_partial_cap.query_roce_addr_other_vport tool_partial_cap.query_vuid_direct_data tool_partial_cap.query_hca_cap_other_func
Bug Fixes	See Bug Fixes in this Firmware Version section.

Feature/Change	Description
20.42.1000
Memory Slow Release	Added a new command interface "Memory slow release" to enable/disable holding memory pages for a defined period of time. Once the timer expires, the firmware will return the pages to the driver.
Kernel Lockdown	Added support for MVTS register via a miscellaneous driver using the access_register PRM command.
Bug Fixes	See Bug Fixes in this Firmware Version section.

Feature/Change	Description
20.41.1000
Steering Match	Added support for steering match on packet l4_type through FTG/FTE.
Bug Fixes	See Bug Fixes in this Firmware Version section.

Feature/Change	Description
20.40.1000
Bug Fixes	See Bug Fixes in this Firmware Version section.

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