What's New in This Guide

This section lists the documentation updates for release 25.1.1xx.

Release 25.1.100- G18648-03, May 2025

Updated the description of the Discovery Parameter Value Based Skip SLF Lookup feature in the Discovery Parameter Value Based Skip SLF Lookup section.

Release 25.1.100- G18648-02, April 2025

Added the following alerts in the Service Level Alerts section:

Release 25.1.100- G18648-01, April 2025

Feature Updates

New Features:
- Discovery Parameter Value Based Skip SLF Lookup
  - Added the Discovery Parameter Value Based Skip SLF Lookup section to describe the functionality of the feature.
  - Updated the SLF Options section to include the following CNC Console parameters:
    - Value Based Skip SLF Lookup Parameters
    - Enable Value Based Skip SLF Lookup
  - Added the SkipSLFLookupValue dimension in the NRF Metrics section.
  - Added the SkipSLFLookupValue dimension to the ocnrf_nfDiscover_SLFlookup_skipped_total metric in the NRF SLF Metrics section.
- Dual Stack Support
  - Updated the Dual Stack section to describe the functionality of dual stack support feature in NRF with IPv6 over a dual stack with IPv4 preferred platform.
  - Added the following dimensions in the NRF Metrics section:
    - authority
    - BackendSvcAddressType
    - BackendSvc
    - destinationHostAddressType
    - dnsResolvedType
    - egressRoutingMode
    - receivedAddressType
  - Added the oc_ingressgateway_incoming_ip_type and oc_ingressgateway_outgoing_ip_type metrics in the Ingress Gateway Metrics section.
  - Added the oc_egressgateway_incoming_ip_type, oc_egressgateway_outgoing_ip_type, and oc_egressgateway_dualstack_ip_rejected_total metrics in the Egress Gateway Metrics section.
- Traffic Segregation
  - Added the Traffic Segregation section to describe the functionality.
  - Updated the Acronyms section.
- Egress Gateway Pod Throttling
  - Added the feature overview in the Egress Gateway Pod Throttling section.
  - Added the following metrics in the Egress Gateway Metrics section:
    - oc_egressgateway_podlevel_throttling_allowed_total
    - oc_egressgateway_podlevel_throttling_discarded_total
  - Added route_id dimension in the NRF Metrics section.
  - Added the following alerts in the Egress Gateway Pod Throttling section:
    - OcnrfEgressPerPodDiscardRateAboveCriticalThreshold
    - OcnrfEgressPerPodDiscardRateAboveMajorThreshold
  - Added the Egress Gateway Discards Due To Rate Limit KPI in the Egress Gateway Pod Throttling section.
Enhancements:
- Added the NRF Recommended Features section with the mandatory features to be enabled during the NRF deployment at the production-level.
- Updated the NF Screening section to replace Blacklist and Whitelist with Blocklist and Allowlist respectively.
- Updated the nrfSupportedFeatures section with the attributes supported by NRF.
- Added the Use Cases for Allow Duplicate Subscriptions section to include the use cases for allowDuplicateSubscriptions parameter.
- Updated the description of the Allow Duplicate Subscription and NRF Support For Profile Changes In Response parameters in the NF Management Options section.
- Updated the description of the following service operations in the NRF Supported Services section:
  - Retrieval of NF list (NFListRetrieval)
  - Retrieval of NF Profiles (NFProfileRetrieval)
- Updated the procedure for enabling the feature in the NRF Last Known Response section.
- Updated the NRF Metrics section with the following details:
  - Added EgressGatewayOverloaded as a possible value for the RejectionReason dimension.
  - Added a note for the HttpStatusCode dimension.
- Added the following metrics in the NRF NF Metrics section:
  - ocnrf_nfDiscover_tx_response_size_bytes
  - ocnrf_nf_profile_size_bytes
- Updated the System Level Alerts section with the following changes:
  - Added the following alerts:
  - Updated the critical configured threshold for the OcnrfTotalIngressTrafficRateAboveCriticalThreshold alert.
- Added the following KPIs:
  - Network Slice Specific KPIs
    - Empty [Nsi: {{ Nsi }}]
    - Empty [sNssai: {{ sNssai }}]
  - NRF Service KPIs
    - NF Profile Size
    - Discovery Response Size
- Added a note for removing the memory based overload control in the Overload Control Based on Percentage Discards section.

General Updates:

Added a note in the NRF Message Feed section to indicate that certain messages are not copied to the Data Director.
Updated the Enhanced NRF Set Based Deployment (NRF Growth) section with the following:
- Added step 10 in to mention that NRF Growth Forwarding feature should be enabled, if forwarding is applicable and rearranged the configuration procedure.
- Added a note in step 7 stating that one of the entries in staticNrfConfigList must contain the details of the local NRF Set.
Removed the note added for Horizontal POD Autoscaling (HPA) from the Ingress Gateway Pod Protection section as HPA is applicable for all the NRF pods.
Added the following dimensions in the NRF Metrics section:
- type
- TargetNrfFqdn
Added the NfFqdn and TargetNrfFqdn dimensions and removed the NrfFqdn dimension for the following metrics in the Network Slice Specific Metrics section:
- ocnrf_nfDiscover_tx_forwarded_requests_perSnssai_total
- ocnrf_nfDiscover_rx_success_forwarded_responses_perSnssai_total
- ocnrf_nfDiscover_rx_empty_forwarded_responses_perSnssai_total
- ocnrf_nfDiscover_rx_failure_forwarded_responses_perSnssai_total
- ocnrf_nfDiscover_tx_forwarded_requests_perNsi_total
- ocnrf_nfDiscover_rx_success_forwarded_responses_perNsi
- ocnrf_nfDiscover_rx_empty_forwarded_responses_perNsi
- ocnrf_nfDiscover_rx_failure_forwarded_responses_perNsi_total
Added the following sections to include the error codes for NF Discovery microservices:
- Unsupported HTTP Method for NFDiscover Service Operation
- Unsupported Media Type for NFDiscover Service Operation
Added the following error codes in the NFDiscover Service Operation section:
- ONRF-DIS-DISC-E0010
- ONRF-DIS-DISC-E0007
Added the command to apply the filter in each namespace for the server header propagation in the Adding Filters for Server Header Propagation section.