free5gc-stage-2

free5GC v3.0.0 Installation Guide

Minimum Requirement

• Software
  • OS: Ubuntu 18.04 or later versions
  • gcc 7.3.0
  • Go 1.12.9 linux/amd64
  • QEMU emulator 2.11.1
  • kernel version 5.0.0-23-generic (MUST for UPF)

Note: Please use Ubuntu 18.04 or later versions and go 1.12.9 linux/amd64

You can use go version to check your current Go version.

- Hardware
    - CPU: Intel i5 processor
    - RAM: 4GB
    - Hard drive: 160G
    - NIC card: 1Gbps ethernet card

- Hardware recommended
    - CPU: Intel i7 processor
    - RAM: 8GB
    - Hard drive: 160G
    - NIC card: 10Gbps ethernet card

Hardware Tested

There are no gNB and UE for standalone 5GC available in the market yet.

Installation

A. Pre-requisite

1. Required packages for control plane

   sudo apt -y update
   sudo apt -y install mongodb wget git
   sudo systemctl start mongodb
   

2. Required packages for user plane

   sudo apt -y update
   sudo apt -y install git gcc cmake autoconf libtool pkg-config libmnl-dev libyaml-dev
   go get -u github.com/sirupsen/logrus
   

B. Install Control Plane Entities

1. Go installation

   • If another version of Go is installed
     • Please remove the previous Go version
       • sudo rm -rf /usr/local/go
     • Install Go 1.12.9

       wget https://dl.google.com/go/go1.12.9.linux-amd64.tar.gz
       sudo tar -C /usr/local -zxvf go1.12.9.linux-amd64.tar.gz
       

   • Clean installation
     • Install Go 1.12.9

       wget https://dl.google.com/go/go1.12.9.linux-amd64.tar.gz
       sudo tar -C /usr/local -zxvf go1.12.9.linux-amd64.tar.gz
       mkdir -p ~/go/{bin,pkg,src}
       echo 'export GOPATH=$HOME/go' >> ~/.bashrc
       echo 'export GOROOT=/usr/local/go' >> ~/.bashrc
       echo 'export PATH=$PATH:$GOPATH/bin:$GOROOT/bin' >> ~/.bashrc
       echo 'export GO111MODULE=off' >> ~/.bashrc
       source ~/.bashrc
       

2. Clone free5GC project in $GOPATH/src

   cd $GOPATH/src
   git clone https://github.com/free5gc/free5gc.git
   

   In step 3, the folder name should remain free5gc. Please do not modify it or the compilation would fail.

3. Run the script to install dependent packages

   cd $GOPATH/src/free5gc
   chmod +x ./install_env.sh
   ./install_env.sh
   
   Please ignore error messages during the package dependencies installation process.
   

4. Extract the free5gc_libs.tar.gz to setup the environment for compiling

   cd $GOPATH/src/free5gc
   tar -C $GOPATH -zxvf free5gc_libs.tar.gz
   

5. Compile network function services in $GOPATH/src/free5gc individually, e.g. AMF (redo this step for each NF), or

   cd $GOPATH/src/free5gc
   go build -o bin/amf -x src/amf/amf.go
   

   To build all network functions in one command

   ./build.sh
   

C. Install User Plane Function (UPF)

1. Please check Linux kernel version if it is 5.0.0-23-generic

   uname -r
   

   Get Linux kernel module 5G GTP-U

   git clone https://github.com/PrinzOwO/gtp5g.git
   cd gtp5g
   make
   sudo make install
   

2. Build from sources

   cd $GOPATH/src/free5gc/src/upf
   mkdir build
   cd build
   cmake ..
   make -j`nproc`
   

3. Run UPF library test (In directory: $GOPATH/src/free5gc/src/upf/build)

   sudo ./bin/testgtpv1
   

Note: Config is located at $GOPATH/src/free5gc/src/upf/build/config/upfcfg.yaml

Configuration

A. Configure SMF with S-NSSAI

1. Configure NF Registration SMF S-NSSAI in smfcfg.conf

snssai_info:
- sNssai:
    sst: 1
    sd: 010203
  dnnSmfInfoList:
    - dnn: internet
- sNssai:
    sst: 1
    sd: 112233
  dnnSmfInfoList:
    - dnn: internet

B. Configure Uplink Classifier (ULCL) information in SMF

1. Enable ULCL feature in smfcfg.conf

    ulcl:true

1. Configure UE routing path in uerouting.yaml

ueRoutingInfo:
  - SUPI: imsi-2089300007487
    AN: 10.200.200.101
    PathList:
      - DestinationIP: 60.60.0.101
        DestinationPort: 8888
        UPF: !!seq
          - BranchingUPF
          - AnchorUPF1

      - DestinationIP: 60.60.0.103
        DestinationPort: 9999
        UPF: !!seq
          - BranchingUPF
          - AnchorUPF2

:::info

• DestinationIP and DestinationPort will be the packet destination.
• UPF field will be the packet datapath when it match the destination above. :::

Run

A. Run Core Network

Option 1. Run network function service individually, e.g. AMF (redo this for each NF), or

cd $GOPATH/src/free5gc
./bin/amf

Note: For N3IWF needs specific configuration in section B

Option 2. Run whole core network with command

./run.sh

B. Run N3IWF (Individually)

To run N3IWF, make sure the machine is equipped with three network interfaces. (one is for connecting AMF, another is for connecting UPF, the other is for IKE daemon)

We need to configure each interface with a suitable IP address.

We have to create an interface for IPSec traffic:

# replace <...> to suitable value
sudo ip link add ipsec0 type vti local <IKEBindAddress> remote 0.0.0.0 key <IPSecInterfaceMark>

Assign an address to this interface, then bring it up:

# replace <...> to suitable value
sudo ip address add <IPSecInterfaceAddress/CIDRPrefix> dev ipsec0
sudo ip link set dev ipsec0 up

Run N3IWF (root privilege is required):

cd $GOPATH/src/free5gc/
sudo ./bin/n3iwf

Test

Start Wireshark to capture any interface with pfcp||icmp||gtp filter and run the tests below to simulate the procedures:

cd $GOPATH/src/free5gc
chmod +x ./test.sh

a. TestRegistration

(In directory: $GOPATH/src/free5gc)
./test.sh TestRegistration

b. TestServiceRequest

./test.sh TestServiceRequest

c. TestXnHandover

./test.sh TestXnHandover

d. TestDeregistration

./test.sh TestDeregistration

e. TestPDUSessionReleaseRequest

./test.sh TestPDUSessionReleaseRequest

f. TestPaging

./test.sh TestPaging

g. TestN2Handover

./test.sh TestN2Handover

h. TestNon3GPP

./test.sh TestNon3GPP

i. TestULCL

./test_ulcl.sh -om 3 TestRegistration

Appendix A: OAM

1. Run the OAM server

cd webconsole
go run server.go

1. Access the OAM by

URL: http://localhost:5000
Username: admin
Password: free5gc

1. Now you can see the information of currently registered UEs (e.g. Supi, connected state, etc.) in the core network at the tab "DASHBOARD" of free5GC webconsole

Note: You can add the subscribers here too

Appendix B: Orchestrator

Please refer to here

Appendix C: IPTV

Please refer to here

Appendix D: System Environment Cleaning

The below commands may be helpful for development purposes.

1. Remove POSIX message queues
   • ls /dev/mqueue/
   • rm /dev/mqueue/*
2. Remove gtp5g tunnels (using tools in libgtp5gnl)
   • cd ./src/upf/lib/libgtp5gnl/tools
   • ./gtp5g-tunnel list pdr
   • ./gtp5g-tunnel list far
3. Remove gtp5g devices (using tools in libgtp5gnl)
   • cd ./src/upf/lib/libgtp5gnl/tools
   • sudo ./gtp5g-link del {Dev-Name}

Appendix E: Change Kernel Version

1. Check the previous kernel version: uname -r
2. Search specific kernel version and install, take 5.0.0-23-generic for example

sudo apt search 'linux-image-5.0.0-23-generic'
sudo apt install 'linux-image-5.0.0-23-generic'
sudo apt install 'linux-headers-5.0.0-23-generic'

1. Update initramfs and grub

sudo update-initramfs -u -k all
sudo update-grub

1. Reboot, enter grub and choose kernel version 5.0.0-23-generic

sudo reboot

Optional: Remove Kernel Image

sudo apt remove 'linux-image-5.0.0-23-generic'
sudo apt remove 'linux-headers-5.0.0-23-generic'

Appendix F: Program the SIM Card

Install packages:

sudo apt-get install pcscd pcsc-tools libccid python-dev swig python-setuptools python-pip libpcsclite-dev
sudo pip install pycrypto

Download PySIM

git clone git://git.osmocom.org/pysim.git

Change to pyscard folder and install

cd <pyscard-path>
sudo /usr/bin/python setup.py build_ext install

Verify your reader is ready

sudo pcsc_scan

Check whether your reader can read the SIM card

cd <pysim-path>
./pySim-read.py –p 0

Program your SIM card information

./pySim-prog.py -p 0 -x 208 -y 93 -t sysmoUSIM-SJS1 -i 208930000000003 --op=8e27b6af0e692e750f32667a3b14605d -k 8baf473f2f8fd09487cccbd7097c6862 -s 8988211000000088313 -a 23605945

You can get your SIM card from sysmocom. You also need a card reader to write your SIM card. You can get a card reader from here or use other similar devices.

Trouble Shooting

1. ERROR: [SCTP] Failed to connect given AMF N3IWF=NGAP

   This error occured when N3IWF was started before AMF finishing initialization. This error usually appears when you run the TestNon3GPP in the first time.

   Rerun the test should be fine. If it still not be solved, larger the sleeping time in line 110 of test.sh.

2. TestNon3GPP will modify the config/amfcfg.conf. So, if you had killed the TestNon3GPP test before it finished, you might need to copy config/amfcfg.conf.bak back to config/amfcfg.conf to let other tests pass.

   cp config/amfcfg.conf.bak config/amfcfg.conf

Release Note

v3.0.0

• AMF
  • Support SMF selection at PDU session establishment
  • Fix SUCI handling procedure
• SMF
  • Feature
    • ULCL by config
    • Authorized QoS
  • Bugfix
    • PDU Session Establishment PDUAddress Information
    • PDU Session Establishment N1 Message
    • SMContext Release Procedure
• UPF:
  • ULCL feature
  • support SDF Filter
  • support N9 interface
• OAM
  • Get Registered UE Context API
  • OAM web UI to display Registered UE Context
• N3IWF
  • Support Registration procedure for untrusted non-3GPP access
  • Support UE Requested PDU Session Establishment via Untrusted non-3GPP Access
• UDM
  • SUCI to SUPI de-concealment
  • Notification
    • Callback notification to NF ( in SDM service)
    • UDM initiated deregistration notification to NF ( in UECM service)

v2.0.2

• Add debug mode on NFs
• Auto add Linux routing when UPF runs
• Add AMF consumer for AM policy
• Add SM policy
• Allow security NIA0 and NEA0
• Add handover feature
• Add webui
• Update license
• Bugfix for incorrect DNN
• Bugfix for NFs registering to NRF

v2.0.1

• Global

  • Update license and readme
  • Add Paging feature
  • Bugfix for AN release issue
  • Add URL for SBI in NFs' config

• AMF

  • Add Paging feature
  • Bugfix for SCTP PPID to 60
  • Bugfix for UE release in testing
  • Bugfix for too fast send UP data in testing
  • Bugfix for sync with defaultc config in testing

• SMF

  • Add Paging feature
  • Create PDR with FAR ID
  • Bugfix for selecting DNN fail handler

• UPF

  • Sync config default address with Go NFs
  • Remove GTP tunnel by removing PDR/FAR
  • Bugfix for PFCP association setup
  • Bugfix for new PDR/FAR creating
  • Bugfix for PFCP session report
  • Bugfix for getting from PDR
  • Bugfix for log format and update logger version

• PCF

  • Bugfix for lost field and method