srsRAN_Project and srsRAN_4G software suites include a virtual radio which uses the ZeroMQ networking library to transfer radio samples between applications. Therefore, in order to use U-Plane's DN (Data Network) as a trial, I built a simulation environment for the 5GC mobile network. This briefly describes the overall and configuration files in the Virtualbox VM environment.
- Overview of Open5GS 5GC Simulation Mobile Network
- Changes in configuration files of Open5GS 5GC and srsRAN 5G ZMQ UE / RAN
- Network settings of Open5GS 5GC
- Build Open5GS and srsRAN 5G ZMQ UE / RAN
- Run Open5GS 5GC and srsRAN 5G ZMQ UE / RAN
- Ping google.com
- Changelog (summary)
I created a 5GC mobile network (Internet reachable) for simulation with the aim of creating an environment in which packets can be sent end-to-end with one DN for one DNN.
The following minimum configuration was set as a condition.
- Only one each for C-Plane, U-Plane and UE.
The built simulation environment is as follows.
The 5GC / UE / RAN used are as follows.
- 5GC - Open5GS v2.7.0 (2024.03.24) - https://github.com/open5gs/open5gs
- RAN - srsRAN Project (2024.03.25) - https://github.com/srsran/srsRAN_Project
- UE (NR-UE) - srsRAN 4G (2024.02.01) - https://github.com/srsran/srsRAN_4G
Each VMs are as follows.
| VM | SW & Role | IP address | OS | CPU (Min) |
Memory (Min) |
HDD (Min) |
|---|---|---|---|---|---|---|
| VM1 | Open5GS 5GC C-Plane | 192.168.0.111/24 | Ubuntu 22.04 | 1 | 2GB | 20GB |
| VM2 | Open5GS 5GC U-Plane | 192.168.0.112/24 | Ubuntu 22.04 | 1 | 1GB | 20GB |
| VM3 | srsRAN Project ZMQ RAN (gNodeB) |
192.168.0.121/24 | Ubuntu 22.04 | 2 | 4GB | 10GB |
| VM4 | srsRAN 4G ZMQ UE (NR-UE) |
192.168.0.122/24 | Ubuntu 22.04 | 1 | 2GB | 10GB |
AMF & SMF addresses are as follows.
| NF | IP address | IP address on SBI | Supported S-NSSAI |
|---|---|---|---|
| AMF | 192.168.0.111 | 127.0.0.5 | SST:1, SD:0x000001 |
| SMF | 192.168.0.111 | 127.0.0.4 | SST:1, SD:0x000001 |
Subscriber Information (other information is the same) is as follows.
| UE | IMSI | DNN | OP/OPc | S-NSSAI |
|---|---|---|---|---|
| UE (NR-UE) | 001010000000000 | internet | OPc | SST:1, SD:0x000001 |
I registered these information with the Open5GS WebUI. In addition, 3GPP TS 35.208 "4.3 Test Sets" is published by 3GPP as test data for the 3GPP authentication and key generation functions (MILENAGE).
DN is as follows.
| DN | S-NSSAI | TUNnel interface of DN | DNN | TUNnel interface of UE |
|---|---|---|---|---|
| 10.45.0.0/16 | SST:1 SD:0x000001 |
ogstun | internet | tun_srsue |
The main information of gNodeB is as follows.
| MCC | MNC | TAC | gNodeB ID |
|---|---|---|---|
| 001 | 01 | 1 | 0x19b |
Additional information.
Open5GS 5GC U-Plane worked fine on Raspberry Pi 4 Model B. I used Ubuntu 20.04 (64bit) for Raspberry Pi 4 as the OS. I think it would be convenient to place a compact U-Plane in the edge environment and use it as an end-point for DN.
In addition, I have not confirmed the communication performance.
Please refer to the following for building Open5GS and srsRAN 5G ZMQ UE / RAN respectively.
- Open5GS v2.7.0 (2024.03.24) - https://open5gs.org/open5gs/docs/guide/02-building-open5gs-from-sources/
- srsRAN Project (RAN) (2024.03.25) - https://github.com/s5uishida/build_srsran_5g_zmq
- srsRAN 4G (UE) (2024.02.01) - https://github.com/s5uishida/build_srsran_4g_zmq_disable_rf_plugins
The following parameters can be used in the logic that selects UPF as the connection destination by PFCP.
- DNN
- TAC (Tracking Area Code)
- nr_CellID
For the sake of simplicity, I used only DNN this time.
open5gs/install/etc/open5gs/amf.yaml
--- amf.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ amf.yaml 2024-03-29 22:14:08.359119294 +0900
@@ -19,29 +19,30 @@
- uri: http://127.0.0.200:7777
ngap:
server:
- - address: 127.0.0.5
+ - address: 192.168.0.111
metrics:
server:
- address: 127.0.0.5
port: 9090
guami:
- plmn_id:
- mcc: 999
- mnc: 70
+ mcc: 001
+ mnc: 01
amf_id:
region: 2
set: 1
tai:
- plmn_id:
- mcc: 999
- mnc: 70
+ mcc: 001
+ mnc: 01
tac: 1
plmn_support:
- plmn_id:
- mcc: 999
- mnc: 70
+ mcc: 001
+ mnc: 01
s_nssai:
- sst: 1
+ sd: 000001
security:
integrity_order : [ NIA2, NIA1, NIA0 ]
ciphering_order : [ NEA0, NEA1, NEA2 ]open5gs/install/etc/open5gs/nrf.yaml
--- nrf.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ nrf.yaml 2024-03-29 22:38:40.866371099 +0900
@@ -10,8 +10,8 @@
nrf:
serving: # 5G roaming requires PLMN in NRF
- plmn_id:
- mcc: 999
- mnc: 70
+ mcc: 001
+ mnc: 01
sbi:
server:
- address: 127.0.0.10open5gs/install/etc/open5gs/smf.yaml
--- smf.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ smf.yaml 2024-03-31 22:45:18.892357262 +0900
@@ -19,35 +19,31 @@
- uri: http://127.0.0.200:7777
pfcp:
server:
- - address: 127.0.0.4
+ - address: 192.168.0.111
client:
upf:
- - address: 127.0.0.7
- gtpc:
- server:
- - address: 127.0.0.4
+ - address: 192.168.0.112
+ dnn: internet
gtpu:
server:
- - address: 127.0.0.4
+ - address: 192.168.0.111
metrics:
server:
- address: 127.0.0.4
port: 9090
session:
- subnet: 10.45.0.1/16
- - subnet: 2001:db8:cafe::1/48
+ dnn: internet
dns:
- 8.8.8.8
- 8.8.4.4
- - 2001:4860:4860::8888
- - 2001:4860:4860::8844
mtu: 1400
# p-cscf:
# - 127.0.0.1
# - ::1
# ctf:
# enabled: auto # auto(default)|yes|no
- freeDiameter: /root/open5gs/install/etc/freeDiameter/smf.conf
+# freeDiameter: /root/open5gs/install/etc/freeDiameter/smf.conf
################################################################################
# SMF Infoopen5gs/install/etc/open5gs/upf.yaml
--- upf.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ upf.yaml 2024-03-29 22:18:51.683148805 +0900
@@ -10,16 +10,17 @@
upf:
pfcp:
server:
- - address: 127.0.0.7
+ - address: 192.168.0.112
client:
# smf: # UPF PFCP Client try to associate SMF PFCP Server
# - address: 127.0.0.4
gtpu:
server:
- - address: 127.0.0.7
+ - address: 192.168.0.112
session:
- subnet: 10.45.0.1/16
- - subnet: 2001:db8:cafe::1/48
+ dnn: internet
+ dev: ogstun
metrics:
server:
- address: 127.0.0.7See here for the original files.
srsRAN_Project/build/apps/gnb/gnb_zmq.yaml
--- gnb_zmq.yaml.orig 2024-04-23 20:02:09.000000000 +0900
+++ gnb_zmq.yaml 2024-05-12 16:05:48.650203165 +0900
@@ -3,13 +3,21 @@
# To run the srsRAN Project gNB with this config, use the following command:
# sudo ./gnb -c gnb_zmq.yaml
+gnb_id: 0x19B
+
+slicing:
+ - sst: 1
+ sd: 1
+
amf:
- addr: 10.53.1.2 # The address or hostname of the AMF.
- bind_addr: 10.53.1.1 # A local IP that the gNB binds to for traffic from the AMF.
+ addr: 192.168.0.111 # The address or hostname of the AMF.
+# bind_addr: 10.53.1.1 # A local IP that the gNB binds to for traffic from the AMF.
+ n2_bind_addr: 192.168.0.121 # Optional TEXT. Sets local IP address to bind for N2 interface. Format: IPV4 or IPV6 IP address.
+ n3_bind_addr: 192.168.0.121 # Optional TEXT. Sets local IP address to bind for N3 interface. Format: IPV4 or IPV6 IP address.
ru_sdr:
device_driver: zmq # The RF driver name.
- device_args: tx_port=tcp://127.0.0.1:2000,rx_port=tcp://127.0.0.1:2001,base_srate=23.04e6 # Optionally pass arguments to the selected RF driver.
+ device_args: tx_port=tcp://192.168.0.121:2000,rx_port=tcp://192.168.0.122:2001,base_srate=23.04e6 # Optionally pass arguments to the selected RF driver.
srate: 23.04 # RF sample rate might need to be adjusted according to selected bandwidth.
tx_gain: 75 # Transmit gain of the RF might need to adjusted to the given situation.
rx_gain: 75 # Receive gain of the RF might need to adjusted to the given situation.
@@ -20,7 +28,7 @@
channel_bandwidth_MHz: 20 # Bandwith in MHz. Number of PRBs will be automatically derived.
common_scs: 15 # Subcarrier spacing in kHz used for data.
plmn: "00101" # PLMN broadcasted by the gNB.
- tac: 7 # Tracking area code (needs to match the core configuration).
+ tac: 1 # Tracking area code (needs to match the core configuration).
pdcch:
common:
ss0_index: 0 # Set search space zero index to match srsUE capabilitiesSee here for the original files.
srsRAN_4G/build/srsue/ue_zmq.conf
--- ue_zmq.conf.orig 2023-12-07 03:04:57.000000000 +0900
+++ ue_zmq.conf 2024-03-29 22:41:01.107838116 +0900
@@ -6,7 +6,7 @@
nof_antennas = 1
device_name = zmq
-device_args = tx_port=tcp://127.0.0.1:2001,rx_port=tcp://127.0.0.1:2000,base_srate=23.04e6
+device_args = tx_port=tcp://192.168.0.122:2001,rx_port=tcp://192.168.0.121:2000,base_srate=23.04e6
[rat.eutra]
dl_earfcn = 2850
@@ -34,9 +34,9 @@
[usim]
mode = soft
algo = milenage
-opc = 63BFA50EE6523365FF14C1F45F88737D
-k = 00112233445566778899aabbccddeeff
-imsi = 001010123456780
+opc = E8ED289DEBA952E4283B54E88E6183CA
+k = 465B5CE8B199B49FAA5F0A2EE238A6BC
+imsi = 001010000000000
imei = 353490069873319
[rrc]
@@ -44,11 +44,16 @@
ue_category = 4
[nas]
-apn = srsapn
+apn = internet
apn_protocol = ipv4
+[slicing]
+enable = true
+nssai-sst = 1
+nssai-sd = 1
+
[gw]
-netns = ue1
+#netns = ue1
ip_devname = tun_srsue
ip_netmask = 255.255.255.0
First, uncomment the next line in the /etc/sysctl.conf file and reflect it in the OS.
net.ipv4.ip_forward=1
# sysctl -p
Next, configure the TUNnel interface and NAPT.
ip tuntap add name ogstun mode tun
ip addr add 10.45.0.1/16 dev ogstun
ip link set ogstun up
iptables -t nat -A POSTROUTING -s 10.45.0.0/16 ! -o ogstun -j MASQUERADE
Please refer to the following for building Open5GS and srsRAN 5G ZMQ UE / RAN respectively.
- Open5GS v2.7.0 (2024.03.24) - https://open5gs.org/open5gs/docs/guide/02-building-open5gs-from-sources/
- srsRAN Project (RAN) (2024.03.25) - https://github.com/s5uishida/build_srsran_5g_zmq
- srsRAN 4G (UE) (2024.02.01) - https://github.com/s5uishida/build_srsran_4g_zmq_disable_rf_plugins
Install MongoDB on Open5GS 5GC C-Plane machine. It is not necessary to install MongoDB on Open5GS 5GC U-Plane machines. MongoDB Compass is a convenient tool to look at the MongoDB database.
First run the 5GC, then the RAN, and the UE.
First, run Open5GS 5GC C-Plane.
- Open5GS 5GC C-Plane
./install/bin/open5gs-nrfd &
sleep 2
./install/bin/open5gs-scpd &
sleep 2
./install/bin/open5gs-amfd &
sleep 2
./install/bin/open5gs-smfd &
./install/bin/open5gs-ausfd &
./install/bin/open5gs-udmd &
./install/bin/open5gs-udrd &
./install/bin/open5gs-pcfd &
./install/bin/open5gs-nssfd &
./install/bin/open5gs-bsfd &
Next, run Open5GS 5GC U-Plane.
- Open5GS 5GC U-Plane
./install/bin/open5gs-upfd &
Run srsRAN 5G ZMQ RAN and connect to Open5GS 5GC.
# cd srsRAN_Project/build/apps/gnb
# ./gnb -c gnb_zmq.yaml
The PRACH detector will not meet the performance requirements with the configuration {Format 0, ZCZ 0, SCS 1.25kHz, Rx ports 1}.
Lower PHY in executor blocking mode.
--== srsRAN gNB (commit 2f90c8b60) ==--
Connecting to AMF on 192.168.0.111:38412
Available radio types: zmq.
Cell pci=1, bw=20 MHz, dl_arfcn=368500 (n3), dl_freq=1842.5 MHz, dl_ssb_arfcn=368410, ul_freq=1747.5 MHz
==== gNodeB started ===
Type <t> to view trace
The Open5GS C-Plane log when executed is as follows.
03/30 00:09:23.278: [amf] INFO: gNB-N2 accepted[192.168.0.121]:39830 in ng-path module (../src/amf/ngap-sctp.c:113)
03/30 00:09:23.278: [amf] INFO: gNB-N2 accepted[192.168.0.121] in master_sm module (../src/amf/amf-sm.c:754)
03/30 00:09:23.284: [amf] INFO: [Added] Number of gNBs is now 1 (../src/amf/context.c:1236)
03/30 00:09:23.284: [amf] INFO: gNB-N2[192.168.0.121] max_num_of_ostreams : 30 (../src/amf/amf-sm.c:793)
Run srsRAN 5G ZMQ UE and connect to Open5GS 5GC.
# cd srsRAN_4G/build/srsue
# ./src/srsue ue_zmq.conf
Reading configuration file ue_zmq.conf...
Built in Release mode using commit ec29b0c1f on branch master.
Opening 1 channels in RF device=zmq with args=tx_port=tcp://192.168.0.122:2001,rx_port=tcp://192.168.0.121:2000,base_srate=23.04e6
Supported RF device list: zmq file
CHx base_srate=23.04e6
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
CH0 rx_port=tcp://192.168.0.121:2000
CH0 tx_port=tcp://192.168.0.122:2001
Current sample rate is 23.04 MHz with a base rate of 23.04 MHz (x1 decimation)
Current sample rate is 23.04 MHz with a base rate of 23.04 MHz (x1 decimation)
Waiting PHY to initialize ... done!
Attaching UE...
Random Access Transmission: prach_occasion=0, preamble_index=0, ra-rnti=0x39, tti=174
Random Access Complete. c-rnti=0x4601, ta=0
RRC Connected
PDU Session Establishment successful. IP: 10.45.0.2
RRC NR reconfiguration successful.
The Open5GS C-Plane log when executed is as follows.
03/30 00:09:27.594: [amf] INFO: InitialUEMessage (../src/amf/ngap-handler.c:401)
03/30 00:09:27.594: [amf] INFO: [Added] Number of gNB-UEs is now 1 (../src/amf/context.c:2656)
03/30 00:09:27.594: [amf] INFO: RAN_UE_NGAP_ID[0] AMF_UE_NGAP_ID[1] TAC[1] CellID[0x66c000] (../src/amf/ngap-handler.c:562)
03/30 00:09:27.594: [amf] INFO: [suci-0-001-01-0000-0-0-0000000000] Unknown UE by SUCI (../src/amf/context.c:1840)
03/30 00:09:27.594: [amf] INFO: [Added] Number of AMF-UEs is now 1 (../src/amf/context.c:1621)
03/30 00:09:27.594: [gmm] INFO: Registration request (../src/amf/gmm-sm.c:1224)
03/30 00:09:27.594: [gmm] INFO: [suci-0-001-01-0000-0-0-0000000000] SUCI (../src/amf/gmm-handler.c:172)
03/30 00:09:27.596: [sbi] WARNING: [UDM] (NRF-discover) NF has already been added [4f2a980e-edde-41ee-a832-ebcdb6a42829:1] (../lib/sbi/nnrf-handler.c:1162)
03/30 00:09:27.597: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.12:80] (../lib/sbi/context.c:2210)
03/30 00:09:27.597: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.12:7777] (../lib/sbi/context.c:1946)
03/30 00:09:27.597: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.12:7777] (../lib/sbi/context.c:1946)
03/30 00:09:27.597: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.12:7777] (../lib/sbi/context.c:1946)
03/30 00:09:27.597: [sbi] INFO: [UDM] (NF-discover) NF Profile updated [4f2a980e-edde-41ee-a832-ebcdb6a42829:1] (../lib/sbi/nnrf-handler.c:1200)
03/30 00:09:27.600: [sbi] INFO: [UDM] (SCP-discover) NF registered [4f2a980e-edde-41ee-a832-ebcdb6a42829:1] (../lib/sbi/path.c:211)
03/30 00:09:27.706: [sbi] WARNING: [UDR] (NRF-discover) NF has already been added [4f320f12-edde-41ee-aa40-170e22094cf8:1] (../lib/sbi/nnrf-handler.c:1162)
03/30 00:09:27.706: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.20:80] (../lib/sbi/context.c:2210)
03/30 00:09:27.707: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.20:7777] (../lib/sbi/context.c:1946)
03/30 00:09:27.707: [sbi] INFO: [UDR] (NF-discover) NF Profile updated [4f320f12-edde-41ee-aa40-170e22094cf8:1] (../lib/sbi/nnrf-handler.c:1200)
03/30 00:09:27.708: [sbi] INFO: [UDR] (SCP-discover) NF registered [4f320f12-edde-41ee-aa40-170e22094cf8:1] (../lib/sbi/path.c:211)
03/30 00:09:27.858: [gmm] INFO: [imsi-001010000000000] Registration complete (../src/amf/gmm-sm.c:2321)
03/30 00:09:27.858: [amf] INFO: [imsi-001010000000000] Configuration update command (../src/amf/nas-path.c:591)
03/30 00:09:27.858: [gmm] INFO: UTC [2024-03-29T15:09:27] Timezone[0]/DST[0] (../src/amf/gmm-build.c:558)
03/30 00:09:27.858: [gmm] INFO: LOCAL [2024-03-30T00:09:27] Timezone[32400]/DST[0] (../src/amf/gmm-build.c:563)
03/30 00:09:27.859: [amf] INFO: [Added] Number of AMF-Sessions is now 1 (../src/amf/context.c:2677)
03/30 00:09:27.859: [gmm] INFO: UE SUPI[imsi-001010000000000] DNN[internet] S_NSSAI[SST:1 SD:0x1] smContextRef [NULL] (../src/amf/gmm-handler.c:1285)
03/30 00:09:27.859: [gmm] INFO: SMF Instance [4f3d2294-edde-41ee-b281-f5004b2ffb48] (../src/amf/gmm-handler.c:1324)
03/30 00:09:27.860: [smf] INFO: [Added] Number of SMF-UEs is now 1 (../src/smf/context.c:1019)
03/30 00:09:27.860: [smf] INFO: [Added] Number of SMF-Sessions is now 1 (../src/smf/context.c:3090)
03/30 00:09:27.862: [sbi] WARNING: [UDM] (NRF-discover) NF has already been added [4f2a980e-edde-41ee-a832-ebcdb6a42829:1] (../lib/sbi/nnrf-handler.c:1162)
03/30 00:09:27.862: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.12:80] (../lib/sbi/context.c:2210)
03/30 00:09:27.862: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.12:7777] (../lib/sbi/context.c:1946)
03/30 00:09:27.862: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.12:7777] (../lib/sbi/context.c:1946)
03/30 00:09:27.862: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.12:7777] (../lib/sbi/context.c:1946)
03/30 00:09:27.862: [sbi] INFO: [UDM] (NF-discover) NF Profile updated [4f2a980e-edde-41ee-a832-ebcdb6a42829:1] (../lib/sbi/nnrf-handler.c:1200)
03/30 00:09:27.865: [sbi] INFO: [UDM] (SCP-discover) NF registered [4f2a980e-edde-41ee-a832-ebcdb6a42829:1] (../lib/sbi/path.c:211)
03/30 00:09:27.867: [sbi] WARNING: [PCF] (NRF-discover) NF has already been added [4f31c57a-edde-41ee-beb6-e328e008752e:1] (../lib/sbi/nnrf-handler.c:1162)
03/30 00:09:27.867: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.13:80] (../lib/sbi/context.c:2210)
03/30 00:09:27.867: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.13:7777] (../lib/sbi/context.c:1946)
03/30 00:09:27.867: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.13:7777] (../lib/sbi/context.c:1946)
03/30 00:09:27.867: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.13:7777] (../lib/sbi/context.c:1946)
03/30 00:09:27.867: [sbi] INFO: [PCF] (NF-discover) NF Profile updated [4f31c57a-edde-41ee-beb6-e328e008752e:1] (../lib/sbi/nnrf-handler.c:1200)
03/30 00:09:27.869: [sbi] WARNING: [UDR] (NRF-discover) NF has already been added [4f320f12-edde-41ee-aa40-170e22094cf8:1] (../lib/sbi/nnrf-handler.c:1162)
03/30 00:09:27.869: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.20:80] (../lib/sbi/context.c:2210)
03/30 00:09:27.869: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.20:7777] (../lib/sbi/context.c:1946)
03/30 00:09:27.869: [sbi] INFO: [UDR] (NF-discover) NF Profile updated [4f320f12-edde-41ee-aa40-170e22094cf8:1] (../lib/sbi/nnrf-handler.c:1200)
03/30 00:09:27.871: [sbi] WARNING: [UDR] (SCP-discover) NF has already been added [4f320f12-edde-41ee-aa40-170e22094cf8:2] (../lib/sbi/path.c:216)
03/30 00:09:27.872: [sbi] WARNING: [BSF] (NRF-discover) NF has already been added [4f2af72c-edde-41ee-9bf5-834c8a50b80e:1] (../lib/sbi/nnrf-handler.c:1162)
03/30 00:09:27.872: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.15:80] (../lib/sbi/context.c:2210)
03/30 00:09:27.872: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.15:7777] (../lib/sbi/context.c:1946)
03/30 00:09:27.872: [sbi] INFO: [BSF] (NF-discover) NF Profile updated [4f2af72c-edde-41ee-9bf5-834c8a50b80e:1] (../lib/sbi/nnrf-handler.c:1200)
03/30 00:09:27.873: [sbi] INFO: [BSF] (SCP-discover) NF registered [4f2af72c-edde-41ee-9bf5-834c8a50b80e:1] (../lib/sbi/path.c:211)
03/30 00:09:27.875: [sbi] INFO: [PCF] (SCP-discover) NF registered [4f31c57a-edde-41ee-beb6-e328e008752e:1] (../lib/sbi/path.c:211)
03/30 00:09:27.875: [smf] INFO: UE SUPI[imsi-001010000000000] DNN[internet] IPv4[10.45.0.2] IPv6[] (../src/smf/npcf-handler.c:542)
03/30 00:09:27.876: [gtp] INFO: gtp_connect() [192.168.0.112]:2152 (../lib/gtp/path.c:60)
03/30 00:09:28.014: [sbi] WARNING: [UDM] (NRF-discover) NF has already been added [4f2a980e-edde-41ee-a832-ebcdb6a42829:1] (../lib/sbi/nnrf-handler.c:1162)
03/30 00:09:28.014: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.12:80] (../lib/sbi/context.c:2210)
03/30 00:09:28.014: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.12:7777] (../lib/sbi/context.c:1946)
03/30 00:09:28.014: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.12:7777] (../lib/sbi/context.c:1946)
03/30 00:09:28.014: [sbi] WARNING: NF EndPoint(addr) updated [127.0.0.12:7777] (../lib/sbi/context.c:1946)
03/30 00:09:28.015: [sbi] INFO: [UDM] (NF-discover) NF Profile updated [4f2a980e-edde-41ee-a832-ebcdb6a42829:1] (../lib/sbi/nnrf-handler.c:1200)
03/30 00:09:28.016: [sbi] WARNING: [UDM] (SCP-discover) NF has already been added [4f2a980e-edde-41ee-a832-ebcdb6a42829:2] (../lib/sbi/path.c:216)
03/30 00:09:28.017: [amf] INFO: [imsi-001010000000000:1:11][0:0:NULL] /nsmf-pdusession/v1/sm-contexts/{smContextRef}/modify (../src/amf/nsmf-handler.c:867)
03/30 00:09:28.137: [gmm] INFO: [imsi-001010000000000] No GUTI allocated (../src/amf/gmm-sm.c:1599)
The Open5GS U-Plane log when executed is as follows.
03/30 00:09:27.828: [upf] INFO: [Added] Number of UPF-Sessions is now 1 (../src/upf/context.c:208)
03/30 00:09:27.828: [gtp] INFO: gtp_connect() [192.168.0.111]:2152 (../lib/gtp/path.c:60)
03/30 00:09:27.828: [upf] INFO: UE F-SEID[UP:0x80 CP:0xc81] APN[internet] PDN-Type[1] IPv4[10.45.0.2] IPv6[] (../src/upf/context.c:485)
03/30 00:09:27.828: [upf] INFO: UE F-SEID[UP:0x80 CP:0xc81] APN[internet] PDN-Type[1] IPv4[10.45.0.2] IPv6[] (../src/upf/context.c:485)
03/30 00:09:27.965: [gtp] INFO: gtp_connect() [192.168.0.121]:2152 (../lib/gtp/path.c:60)
The result of ip addr show on VM4 (UE) is as follows.
# ip addr show
...
11: tun_srsue: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 500
link/none
inet 10.45.0.2/24 scope global tun_srsue
valid_lft forever preferred_lft forever
...
Specify the TUN interface on VM4 (UE) and try ping.
Execute tcpdump on VM2 (U-Plane) and check that the packet goes through if=ogstun.
ping google.comon VM4 (UE)
# ping google.com -I tun_srsue -n
PING google.com (172.217.175.110) from 10.45.0.2 tun_srsue: 56(84) bytes of data.
64 bytes from 172.217.175.110: icmp_seq=1 ttl=61 time=75.0 ms
64 bytes from 172.217.175.110: icmp_seq=2 ttl=61 time=90.5 ms
64 bytes from 172.217.175.110: icmp_seq=3 ttl=61 time=63.3 ms
- Run
tcpdumpon VM2 (U-Plane)
# tcpdump -i ogstun -n
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on ogstun, link-type RAW (Raw IP), snapshot length 262144 bytes
00:09:34.045185 IP 10.45.0.2 > 172.217.175.110: ICMP echo request, id 9, seq 1, length 64
00:09:34.063643 IP 172.217.175.110 > 10.45.0.2: ICMP echo reply, id 9, seq 1, length 64
00:09:35.056189 IP 10.45.0.2 > 172.217.175.110: ICMP echo request, id 9, seq 2, length 64
00:09:35.081234 IP 172.217.175.110 > 10.45.0.2: ICMP echo reply, id 9, seq 2, length 64
00:09:36.042112 IP 10.45.0.2 > 172.217.175.110: ICMP echo request, id 9, seq 3, length 64
00:09:36.057418 IP 172.217.175.110 > 10.45.0.2: ICMP echo reply, id 9, seq 3, length 64
In addition to ping, you may try to access the web by specifying the TUNnel interface with curl as follows.
curl google.comon VM4 (UE)
# curl --interface tun_srsue google.com
<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
<TITLE>301 Moved</TITLE></HEAD><BODY>
<H1>301 Moved</H1>
The document has moved
<A HREF="http://www.google.com/">here</A>.
</BODY></HTML>
- Run
tcpdumpon VM2 (U-Plane)
00:09:38.172434 IP 10.45.0.2.43418 > 172.217.175.110.80: Flags [S], seq 117491664, win 64240, options [mss 1460,sackOK,TS val 2512314474 ecr 0,nop,wscale 7], length 0
00:09:38.189808 IP 172.217.175.110.80 > 10.45.0.2.43418: Flags [S.], seq 18240001, ack 117491665, win 65535, options [mss 1460], length 0
00:09:38.266400 IP 10.45.0.2.43418 > 172.217.175.110.80: Flags [.], ack 1, win 64240, length 0
00:09:38.266562 IP 10.45.0.2.43418 > 172.217.175.110.80: Flags [P.], seq 1:75, ack 1, win 64240, length 74: HTTP: GET / HTTP/1.1
00:09:38.266667 IP 172.217.175.110.80 > 10.45.0.2.43418: Flags [.], ack 75, win 65535, length 0
00:09:38.326674 IP 172.217.175.110.80 > 10.45.0.2.43418: Flags [P.], seq 1:774, ack 75, win 65535, length 773: HTTP: HTTP/1.1 301 Moved Permanently
00:09:38.420663 IP 10.45.0.2.43418 > 172.217.175.110.80: Flags [.], ack 774, win 63467, length 0
00:09:38.420712 IP 10.45.0.2.43418 > 172.217.175.110.80: Flags [F.], seq 75, ack 774, win 63467, length 0
00:09:38.420826 IP 172.217.175.110.80 > 10.45.0.2.43418: Flags [.], ack 76, win 65535, length 0
00:09:38.436939 IP 172.217.175.110.80 > 10.45.0.2.43418: Flags [F.], seq 774, ack 76, win 65535, length 0
00:09:38.474196 IP 10.45.0.2.43418 > 172.217.175.110.80: Flags [.], ack 775, win 63467, length 0
You could now create the end-to-end TUN interface on the DN and send any packets on the network.
In investigating 5G SA, I have built a simulation environment and can now use a very useful system for investigating 5GC and MEC of 5G SA mobile network. I would like to thank the excellent developers and all the contributors of Open5GS, srsRAN Project and srsRAN 4G.
- [2024.03.31] This commit fixed the issue where SMF crashes without
gtpcsection insmf.yaml. So deleted thegtpcsection insmf.yamlfor 5G use. - [2024.03.29] Updated to Open5GS v2.7.0 (2024.03.24).
- [2023.11.02] Updated
gnb_zmq.yaml. - [2023.10.21] Updated
gnb_zmq.yamlaccording to srsRAN_Project 23.10 (2023.10.20). - [2023.10.11] Updated Open5GS v2.6.6 (2023.10.10) and srsRAN_Project (2023.09.20).
- [2023.08.26] Initial release.