Release Notes for UCC SMF, Release 2026.01.2

First Customer Ship (FCS)

30-Jan-2026

End of Life (EoL)

30-Jan-2026

End of Software Maintenance (EoSM)

31-July-2027

End of Vulnerability and Security Support (EoVSS)

31-July-2027

Last Date of Support (LDoS)

31-July-2028

Software reliability

Duplicate static IP detection on Attach over Attach PDU sessions

This feature provides duplicate IP detection to be RAT-aware. The mechanism now restricts conflict detection to the same RAT type, preventing erroneous session rejection when users transition between 4G and 5G sessions.

Command introduced:

rat no-match and attributes session-type all — when both these commands are configured in the Event Management policy, the system rejects new session and releases the old session.

Software Reliability

3GPP-compliant Lawful Interception support for geo-redundant deployments

This support enables automatic replication of LI data across geo-redundant. For more information about this feature, contact Cisco account representative.

Software Reliability

2G and 3G session handling with legacy PCF/CHF support

SMF supports 2G and 3G sessions over N7 and N40 interfaces with PCF and CHF. For Release 15 and Release 16 PCF/CHF, the SMF excludes unsupported attributes (for example, RAT Type and ULI) and does not include the UserLocationInfoTime information element when ULI is not present, ensuring backward compatibility.

Software Reliability

3gpp-sbi-target-apiroot header for NRF

The 3GPP-SBI-target-APIroot header lets operators set a target API root URI for registration, deregistration, subscription, unsubscription, update, and discovery messages. SMF includes this header in each HTTP request to NRF, ensuring requests reach the desired destination based on deployment needs.

Command introduced:

·       profile message-handling nf-type nf_type { mh-profile mh_profile_name { service name type service_name_type { message type [ nf-register { header 3gpp-sbi target-apiroot api_root_uri } | nf-deregister { header 3gpp-sbi-target apiroot api_root_uri } | nf-update { header 3gpp-sbi-target-apiroot api_root_uri } | nf-status-subscribe { header 3gpp-sbi-target-apiroot api_root_uri } | nf-status unsubscribe { header 3gpp-sbi-target-apiroot api_root_uri } ] } } } — Used to configure the target API root URI for NF management messages.

·       profile message-handling nf-type nf_type { mh-profile mh_profile_name {service name type service_name_type {message type nf-discover {header 3gpp-sbi target-apiroot api_root_uri } } } }—Used to configure the target API root URI for NF discovery.

Default Setting: Disabled – Configuration Required

Incorrect PLMN_CH trigger in CHF update during inter-RAT HO [CSCwt35295]

Previous Behavior: During an inter-RAT handover (HO), the SMF was incorrectly sending a CHF Update with a PLMN_CH trigger to the CHF, even when no actual PLMN change had occurred.

New Behavior: The PLMN change detection logic has been corrected. The SMF now sends a CHF Update with a PLMN_CH trigger to the CHF only when a verified PLMN change is detected during an inter-RAT HO.

Customer Impact: This correction eliminates unnecessary signaling to the CHF, leading to improved system efficiency and reduced load on the CHF.

SMF

CSCwt01329

GeoPod TriggerGR takes more time when multiple etcd get operation timed-out

CSCwt29933

Add Retry mechanism to etcd Grant during setTTL.

CSCwt35295

PLMN_CH trigger getting armed for inter-RAT HO.

CSCwt39953

Debug message required when N16 update is suppressed.

CSCwt47973

Redirect URL sent from PCF is observed only in the FAR of the access side for 5G calls.

CSCwt51430

ConfigMap with null values seen as <no value> with scale config.

CSCwt53190

Upon session report with zero usage for online RG, CDR drop is not happening.

CSCwt55728

Incorrect BCM in Create PDP Context Response in SMF.

CSCwt68370

SMF does not handle create over create from different RAT (4G to wifi/5G).

IoT

CSCwt55728

Incorrect BCM in Create PDP Context Response in SMF.

IoT

CSCwt66542

GSN Address format is not correct in Create PDP Context response in SMF.

Ultra Cloud Core SMI

2026.01.1.i08

Ultra Cloud CDL

2.1

Ultra Cloud Core UPF

2026.01.0

Ultra Cloud cnSGWc

2026.01.2

ccg-2026.01.2.SPA.tgz

The SMF offline release signature package. This package contains the SMF deployment software, NED package, as well as the release signature, certificate, and verification information.

2026.01.2

ncs-6.4.8.2-ccg-nc-1.1. 2026.01.2.tar.SPA.tgz

The NETCONF NED package. This package includes all the yang files that are used for NF configuration.

Note that NSO is used for the NED file creation.

6.4.8.2

ncs-6.1.14-ccg-nc-1.1. 2026.01.2.tar.SPA.tgz

6.1.14

Microsoft Windows

Open a command line window and type the following command:

> certutil.exe -hashfile <filename.extension> SHA512

Apple MAC

Open a terminal window and type the following command:

$ shasum -a 512 <filename.extension>

Linux

Open a terminal window and type the following command:

$ sha512sum <filename.extension>

OR

$ shasum -a 512 <filename.extension>

Note:      <filename> is the name of the file. <extension> is the file type extension (for example, .zip or .tgz).

SMF documentation

Session Management Function

cnSGWc documentation

Serving Gateway Function

SMI documentation

Subscriber Microservices Infrastructure

UPF documentation

User Plane Function

Service request and additional information

Cisco Support