# Supported behavior

Know the current baseline before depending on the core for a broader 5G workflow.

Product: 5G Core

Human documentation: https://www.1sc.dev/docs/core/behavior

Documentation index: https://www.1sc.dev/llms.txt

## Default SA path

The current core targets a narrow but real 5G SA lab path: registration, authentication, slice selection, PDU-session establishment, SMF-to-UPF session programming, and N3 user-plane handling.

| Area | Current baseline |
| --- | --- |
| Subscriber/auth | Lab subscriber authentication through AUSF, UDM, and UDR. |
| Slice/policy | Single default slice and DNN policy through NSSF and PCF. |
| Session | Default PDU session flow through AMF and SMF. |
| User plane | UPF N3 GTP-U handling for the supported lab tunnel. |
| Interop target | UERANSIM-centered lab behavior; broad hardware compatibility is not claimed. |

## Default values

| Field | Default lab value |
| --- | --- |
| DNN | internet |
| Slice | sst=1, sd=010203 |
| PDU session ID | 1 |
| UE IPv4 pool | 10.45.0.0/24 |
| Built-in user-plane target | 10.0.0.1 |