NVIDIA ConnectX-6 Lx Adapter Cards Firmware Release Notes v26.43.2026 LTS

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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
26.43.1014
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
Jump from NIC_TX to FDB_TX	Added `'table_type_valid'` and `'table_type'` fields to the steering action (STC) "Jump To Flow" table parameters to enable the user to jump from NIC_TX to FDB_TX and bypass the ACL table.
Jump to TIR or queue from FDB on Tx	Enabled hop reduction by bypassing NIC domain in various use cases. Such action r educes the number of hops (improves PPS) to deal with mass number of flows and devices. To enable this new capability, a new STC action type "JUMP_TO_FDB_RX" was added to allow jumping into the RX side of a table.
Bug Fixes	See Bug Fixes in this Firmware Version section.

Feature/Change	Description
26.42.1000
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
26.41.1000
TRNG FIPS Compliance	Implemented Deterministic Random Bit Generator (DRBG) algorithm on top of firmware TRNG (the source for raw data input) in accordance with NIST SP800-90A.
vDPA Live Migration	Added support for vDPA virtual queue state change from suspend to ready, and discrete mkey for descriptor. vDPA Live Migration uses these two new capabilities to reduce downtime since vq can go back to ready state for traffic and descriptor-only-mkey can help reduce mkey mapping time.
NVConfig	Added a new NVConfig option to copy AR bit from the BTH header to the DHCP header.
Steering	Added the option provide field's offset and length in Steering add_action option.
Steering Match	Added support for steering match on packet l4_type through FTG/FTE.
Flex Parser Merge Mechanism	Extended Flex Parser merge mechanism to support hardware capabilities.
Flex Parser	Enabled the option to disable the native parser when the parse graph node is configured with the same conditions.
Flex Parser	Added support for father/son headers parsing.
LRO	Added support for tunnel_offload in LRO.
Bug Fixes	See Bug Fixes in this Firmware Version section.

Feature/Change	Description
26.40.1000
ACL	Added support for egress ACL to the uplink by adding a new bit to the Set Flow Table Entry: allow_fdb_uplink_hairpin.
Bug Fixes	See Bug Fixes in this Firmware Version section.

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