Expose AMF SCTP from free5GC docker-compose

free5gc_sctp.md

• you're running free5GC using docker-compose: https://github.com/free5gc/free5gc-compose
• you'd like to connect a gNodeB via network, but the free5GC host is not listening on NGAP/sctp

Add the following to the free5gc-amf section in docker-compose.yaml:

    ports:
      - "38412:38412/sctp"

So that the section looks like this:

free5gc-amf:
    container_name: amf
    build:
      context: .
      dockerfile: Dockerfile
    command: ./amf -amfcfg /config/amfcfg.conf
    expose:
      - "29518"
    ports:
      - "38412:38412/sctp"
    volumes:
      - "./config:/config"
    networks:
      privnet:
        ipv4_address: 10.100.200.3
    depends_on:
      - free5gc-nrf

Common errors:

• docker-compose must be up-to-date, since sctp support was added very recently
• use the full port format 38412:38412/sctp -- 38412/sctp will take a random port on the host side