# Radio attach

Use the generated handoff data and distinguish hosted test proof from hardware readiness.

Product: Hosted Core

Human documentation: https://www.1sc.dev/docs/radio-attach

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

## Required handoff data

- AMF N2 hostname and SCTP port 38412.
- UPF N3 hostname and UDP port 2152.
- Allowed radio source CIDR.
- PLMN, TAC, S-NSSAI, DNN, and subscriber credentials.
- gNB link and advertise addresses appropriate for the radio network.

> **Firewall scope:** Do not replace the radio source CIDR with 0.0.0.0/0. N2 and N3 should accept traffic only from the expected radio source.

## Run hosted validation

| Action | Result |
| --- | --- |
| Run hosted attach test | Spawns UERANSIM against the hosted core. |
| Wait for verified | Confirms registration, PDU session setup, UE IP assignment, and packet flow. |
| Review attach proof | Shows registration, PDU session, UE IP, packet loss, RTT, and raw proof JSON. |

## What passing means

- UERANSIM registered.
- A PDU session was established.
- The UE tunnel received 10.45.0.2.
- ICMP to 10.0.0.1 passed.

> **Separate gates:** A passing hosted test does not prove external N6 forwarding or compatibility with a physical gNB.