5GIWK Active Sessions Count Support in ePDG

Feature Summary and Revison History

Summary Data

Applicable Product(s) or Functional Area

eDPG

Applicable Platform(s)

VPC-DI

Feature Default

Disabled - License Required

Related Changes in This Release

Not Applicable

Related Documentation

  • Command Line Interface Reference

  • ePDG Administration Guide

  • Statistics and Counters Reference

Revision History

Revision Details

Release

ePDG is enhanced to support 5G Active sessions count through Bulkstats counters and show command output.

2024.02.0

Feature Description

ePDG enables mobile operators to provide secure access to the EPC (EvolvedPacket Core) and to interwork with 5G SA Core from an untrusted non-3GPP IP access network.

Since Interworking with 5G SA Core functionality requires purchase of an extra ePDG 5G Sessions license, the ePDG 5G Active Sessions Count feature supports new counters for the total number of Active 5G Sessions and number of Active 5G Sessions of PDN types IPv4, IPv6, and Dual (IPv4v6).

These counters are provided as part of the command show epdg-service statistics and epdg-interworking-5g schema.

This enhancement to the Bulkstats counters and show command output allow the mobile operators to track and monitor the current usage against the installed 5G license.

The Core-Network-Restrictions AVP received from the AAA server in the Diameter EAP Answer (DEA) message is used to determine whether a subscriber session is 5G or 4G.

When this Core-Network-Restrictions AVP does not restrict access to the 5G Core the session gets treated as 5G with the following exceptions:

  • 5G Session License is not installed or 5G interworking functionality is not enabled.

  • 5G Interworking feature is enabled, the custom pgw-selection select pgw 4gonly-ue CLI is configured, and UE is not N1 Mode Capable.

  • 5G Interworking feature is enabled, the custom pgw-selection select pgw no-5gs-interworking CLI is configured, and Interworking-5gs-indicator AVP is “NOT SUBSCRIBED” for the subscriber.

  • 5G Interworking feature is enabled and the custom pgw-selection select pgw smf-not-configured CLI is configured.


Note
In the show epdg-service statistics CLI command there will not be any change in the existing cumulative (4G and 5G) Active Session counts. Upon successful Session Recovery, respective 5G Active Session counters get incremented based on the number of 5G sessions recovered successfully.

Relationships to Other Features

ePDG Interworking with SMF+P-GW-IWK Support: For Information Element and AVP Support, Custom CLIs, and 5G Interworking support details, refer the ePDG Interworking with SMF+P-GW-IWK Support chapter in the ePDG Administration Guide.

Configuring ePDG 5G Interworking Bulk Statistics

Use the following existing configuration command to configure the epdg-interworking-5g bulkstats schema at the system-level. This configuration is only available upon license and 5G interworking is enabled. 

configure 
     bulkstat mode  
          [ no ] epdg-interworking-5g schema schema_name format <format_string> active-only format <format_string>
          end

Note
epdg-interworking-5g schema schema_name format format_string active-only format <format_string>

Allows ePDG to capture 5G interworking related bulk statistics.

no: Deletes bulkstats schema configuration for 5G interworking statistics.

Monitoring and Troubleshooting

This section provides information to monitor and troubleshoot this feature using show commands.

Show Command(s) and/or Outputs

This section provides information about the show commands and outputs for the 5GIWK Active Sessions Count feature.

show epdg-service statistics interworking-5g

The show epdg-service statistics interworking-5g command displays output of Interworking 5G statistics at system-level.

The ePDG 5G Interworking statistics for all services command displays output of Interworking 5G statistics for all ePDG-services. The interworking-5g option is available only with ePDG 5G license.

The following 5G session variables are newly added to the existing list of variables and counters of show epdg-service statistics interworking-5g command.


Note

For more information about the existing list of counters/variables, refer to the Monitoring and Troubleshooting section of the ePDG Interworking with SMF+P-GW-IWK Support chapter.

Table 1. show epdg-service statistics interworking-5g Command Output Descriptions

Field

Description

5G Sessions – Counter for sessions with access to 5G core not restricted and exceptions as specified in the Limitation section.

Active

Total number of 5G Active Sessions.

PDN-Type IPv4

Total number of 5G Active Sessions of PDN type IPv4.

PDN-Type IPv6

Total number of 5G Active Sessions of PDN type IPv6.

PDN-Type IPv4v6

Total number of 5G Active Sessions of PDN type Dual.

clear epdg-service statistics interworking-5g

The clear epdg-service statistics interworking-5g command does not clear newly introduced statistics as part of this feature.

Bulk Statistics

This section provides information on the bulk statistics variables for the epdg-interworking-5g schema. This schema is available upon installing 5G license.

show bulkstats variables epdg-interworking-5g

Use this command to display the list of bulk statistics variables supported by epdg-interworking-5g schema .

The following 5G session bulkstats variables are newly added to the existing list of variables and counters of show bulkstats variables epdg-interworking-5g command.


Note

For more information about the existing list of counters/variables, refer to the Monitoring and Troubleshooting section of the ePDG Interworking with SMF+P-GW-IWK Support chapter.

Bulk Statistics Variables

Description

5G Sessions:

iwk5g-pdn-active

The total number 5G active sessions.

iwk5g-pdn-ipv4-active

The total number of 5G active sessions of PDN type IPv4.

iwk5g-pdn-ipv6-active

The total number of 5G active sessions of PDN type IPv6.

iwk5g-pdn-ipv4v6-active

The total number of 5G Active sessions of PDN type Dual.