What's new in AIX 7.3

Read about new or significantly changed information for the AIX 7.3 operating system.

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December 2025

The following information is a summary of the updates made to AIX® 7.3.4 documentation. To see AIX commands specific summary of updates, see What's new in Commands. For pre-installation checks and changes, see AIX 7.3 Release Notes.

Added information about NVMe disks in the Cluster repository topic.
Updated Limitations of encrypted PV section in the topic Encrypted physical volumes
Added information about the new policy CHKSHOBJS to the Security policies configuration topic.
Added information about the new policy CHKSHOBJS to the Trusted Signature Database topic.
Added new policy CHKSHOBJS to the tepolicies.dat File Format topic.
Added a note to the systemcfg.h File topic.
Added a note to the perfstat_process interfaces topic.
Added information about the procedure to configure SUMA to use the proxy settings in the Service Update Management Assistant (SUMA) topic.
Added a note to the Defining a SPOT resource topic.
Added a note to the AIX update access key topic.
Added information about the new idgeneration and domainid fields and updated the pwdalgorithm, defaulthomedirectory, and defaultloginshell fields in the ldap.cfg File Format topic.
Updated information about the LDAP_Value_Unit attribute in the topic LDAP Attribute-Mapping File Format
Added information about new Configuring AIX to work with AD through LDAP without the SFU plug-in topic.
Updated the Microsoft Active Directory section in the Supported LDAP servers topic.
Updated the note in the Limitations for storage data caching topic.
Added information about the NVMe over TCP/IP software initiator, Configuring NVMe over TCP/IP software initiator, Add a statically discovered NVMe over TCP/IP target into ODM, and Configuring multiple NVMe over TCP/IP software initiator devices topics.
Updated the Open issues section in the Live Library Update topic.
Added new restriction and updated the existing restrictions in the Restrictions of using llvupdate command for LLU operation section of the Live Library Update topic.
Updated the Miscellaneous restrictions section and I/O restrictions section in the Live Update restrictions topic.
Added information about the new mt_qk_io_recov tunable parameter in the Disk and disk adapter tunable parameters topic.
Added a note to the Creating additional interface attributes topic.
Added information about nvme disks in the Cluster repository topic.
Added information about new configure policy CHKSHOBJS in the Trusted Signature Database, Security policies configuration, and tepolicies.dat File Format page that checks the integrity of the shared objects (.o) file that belongs to the lib.tsd.dat file.

July 2025

The following information is a summary of the updates made to AIX 7.3.3, Service Pack 1 documentation. To see AIX commands specific summary of updates, see What's new in Commands. For pre-installation checks and changes, see AIX 7.3 Release Notes.

Updated information in the Enabling cryptographic authentication topic. Provides information about the NIM server and the client.
Added Peripheral Component Interconnect device attribute for storage IO 64K DMA page-size in the Disk and disk adapter tunable parameters section.

December 2024

The following information is a summary of the updates made to AIX 7.3.3 documentation. To see AIX commands specific summary of updates, see What's new in Commands. For pre-installation checks and changes, see AIX 7.3 Release Notes.

Added information about Diffie Hellman (DH) group 20 and 21 support that is added to IPsec in the Internet Key Exchange features page.
Added information about Auditing in the Live Update environment under the Auditing overview topic.
Added LKU broadcast message disablement new page under the Live Update topic.
Added information about the new di_free_minpc field that is added in the d_info structure in the d_map_init_ext Kernel Service topic.
Added Using NIM customer object type new page under the Using NIM resources topic.
Added a new Live Library Update (LLU) page under the Live Update topic. The LLU function eliminates downtime for workloads when the AIX operating system is updated.
Added information about the LDR_CNTRL tunable parameter in the Miscellaneous tunable parameters topic.
Added information about the ipsec_auto_migrate tunable parameter in the lvupdate.data file section in the Configuring resources for Live Update topic. The Live Update feature supports Internet Protocol Security (IPsec) with the help of ipsec_auto_migrate tunable parameter.
Added information about LV encryption support for preservation and migration installation in the BOS installation options page.