Open5GS EPC & srsRAN 4G with ZeroMQ UE / RAN Sample Configuration - Select nearby UPF(PGW-U) according to the connected eNodeB
On 2023.05.05, Open5GS MME has a function to select SMF(PGW-C) by TAC and e_CellID. Therefore I describe a very simple configuration that uses Open5GS and srsRAN 4G to select a nearby UPF(PGW-U) according to the connected eNodeB.
- Overview of Open5GS CUPS-enabled EPC Simulation Mobile Network
- Changes in configuration files of Open5GS EPC and srsRAN 4G ZMQ UE / RAN
- Network settings of Open5GS EPC and srsRAN 4G ZMQ UE / RAN
- Build Open5GS and srsRAN 4G ZMQ UE / RAN
- Run Open5GS EPC and srsRAN 4G ZMQ UE / RAN
- Changelog (summary)
The following minimum configuration was set as a condition.
- The pair of eNodeB and SGW-U/UPF(PGW-U) exists in the same location.
- The UE connected to eNodeB connects to PDN managed by SGW-U/UPF(PGW-U) in the same location.
In this example, TAC is matched to connect eNodeB and MME, and MME selects SGW-C/SMF(PGW-C) using TAC.
The built simulation environment is as follows.
The EPC / UE / RAN used are as follows.
- EPC - Open5GS v2.7.0 (2024.03.24) - https://github.com/open5gs/open5gs
- UE / RAN - srsRAN 4G (2024.02.01) - https://github.com/srsran/srsRAN_4G
Each VMs are as follows.
| VM# | SW & Role | IP address | OS | Memory (Min) | HDD (Min) |
|---|---|---|---|---|---|
| VM1 | Open5GS EPC C-Plane | 192.168.0.111/24 192.168.0.112/24 192.168.0.113/24 192.168.0.114/24 192.168.0.115/24 |
Ubuntu 22.04 | 2GB | 20GB |
| VM2 | Open5GS EPC U-Plane1 | 192.168.0.116/24 192.168.0.117/24 |
Ubuntu 22.04 | 1GB | 20GB |
| VM3 | Open5GS EPC U-Plane2 | 192.168.0.118/24 192.168.0.119/24 |
Ubuntu 22.04 | 1GB | 20GB |
| VM4 | srsRAN 4G ZMQ RAN (eNodeB1) | 192.168.0.121/24 | Ubuntu 22.04 | 2GB | 10GB |
| VM5 | srsRAN 4G ZMQ RAN (eNodeB2) | 192.168.0.122/24 | Ubuntu 22.04 | 2GB | 10GB |
| VM6 | srsRAN 4G ZMQ UE | 192.168.0.123/24 192.168.0.124/24 |
Ubuntu 22.04 | 2GB | 10GB |
MME, SGW-C, SMF(PGW-C) and PCRF addresses are as follows.
| NF | IP address | Local address | Supported TACs |
|---|---|---|---|
| MME | 192.168.0.111 | 127.0.0.2 | 1, 2 |
| SGW-C1 | 192.168.0.112 | 127.0.0.3 | 1 |
| SMF1(PGW-C) | 192.168.0.113 | 127.0.0.4 | 1 |
| PCRF1 | -- | 127.0.0.9 | -- |
| SGW-C2 | 192.168.0.114 | 127.0.0.23 | 2 |
| SMF2(PGW-C) | 192.168.0.115 | 127.0.0.24 | 2 |
| PCRF2 | -- | 127.0.0.29 | -- |
The main information of eNodeBs is as follows.
| eNodeB# | Location# | IP address | MCC | MNC | TAC | eNodeB ID | Cell ID | E-UTRAN Cell ID |
|---|---|---|---|---|---|---|---|---|
| eNodeB1 | Loc1 | 192.168.0.121 | 001 | 01 | 1 | 0x19b | 0x01 | 0x19b01 |
| eNodeB2 | Loc2 | 192.168.0.122 | 001 | 01 | 2 | 0x19c | 0x01 | 0x19c01 |
Subscriber Information (other information is the same) is as follows.
| UE | IMSI | PDN | OP/OPc | eNodeB# | IP address in ue.conf of srsRAN UE |
|---|---|---|---|---|---|
| UE | 001010000000100 | internet | OPc | eNodeB1 in Loc1 eNodeB2 in Loc2 |
192.168.0.123 in ue-loc1.conf 192.168.0.124 in ue-loc2.conf |
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).
Each PDNs are as follows.
| PDN | Location# | TUNnel interface of PDN | APN | TUNnel interface of UE | U-Plane# |
|---|---|---|---|---|---|
| 10.45.0.0/16 | Loc1 | ogstun | internet | tun_srsue | U-Plane1 |
| 10.46.0.0/16 | Loc2 | ogstun | internet | tun_srsue | U-Plane2 |
Please refer to the following for building Open5GS and srsRAN 4G ZMQ UE / RAN respectively.
- Open5GS v2.7.0 (2024.03.24) - https://open5gs.org/open5gs/docs/guide/02-building-open5gs-from-sources/
- srsRAN 4G (2024.02.01) - https://github.com/s5uishida/build_srsran_4g_zmq_disable_rf_plugins
open5gs/install/etc/open5gs/mme.yaml
--- mme.yaml.orig 2024-03-26 21:08:49.043124819 +0900
+++ mme.yaml 2024-03-26 21:15:04.190099414 +0900
@@ -11,30 +11,36 @@
freeDiameter: /root/open5gs/install/etc/freeDiameter/mme.conf
s1ap:
server:
- - address: 127.0.0.2
+ - address: 192.168.0.111
gtpc:
server:
- address: 127.0.0.2
client:
sgwc:
- address: 127.0.0.3
+ tac: 1
+ - address: 127.0.0.23
+ tac: 2
smf:
- address: 127.0.0.4
+ tac: 1
+ - address: 127.0.0.24
+ tac: 2
metrics:
server:
- address: 127.0.0.2
port: 9090
gummei:
- plmn_id:
- mcc: 999
- mnc: 70
+ mcc: 001
+ mnc: 01
mme_gid: 2
mme_code: 1
tai:
- plmn_id:
- mcc: 999
- mnc: 70
- tac: 1
+ mcc: 001
+ mnc: 01
+ tac: [1, 2]
security:
integrity_order : [ EIA2, EIA1, EIA0 ]
ciphering_order : [ EEA0, EEA1, EEA2 ]open5gs/install/etc/open5gs/sgwc1.yaml
--- sgwc.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ sgwc1.yaml 2024-03-26 21:23:17.961823380 +0900
@@ -1,5 +1,5 @@
logger:
- file: /root/open5gs/install/var/log/open5gs/sgwc.log
+ file: /root/open5gs/install/var/log/open5gs/sgwc1.log
# level: info # fatal|error|warn|info(default)|debug|trace
global:
@@ -13,10 +13,11 @@
- address: 127.0.0.3
pfcp:
server:
- - address: 127.0.0.3
+ - address: 192.168.0.112
client:
sgwu:
- - address: 127.0.0.6
+ - address: 192.168.0.116
+ apn: internet
################################################################################
# GTP-C Serveropen5gs/install/etc/open5gs/sgwc2.yaml
--- sgwc.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ sgwc2.yaml 2024-03-26 21:24:49.360916445 +0900
@@ -1,5 +1,5 @@
logger:
- file: /root/open5gs/install/var/log/open5gs/sgwc.log
+ file: /root/open5gs/install/var/log/open5gs/sgwc2.log
# level: info # fatal|error|warn|info(default)|debug|trace
global:
@@ -10,13 +10,14 @@
sgwc:
gtpc:
server:
- - address: 127.0.0.3
+ - address: 127.0.0.23
pfcp:
server:
- - address: 127.0.0.3
+ - address: 192.168.0.114
client:
sgwu:
- - address: 127.0.0.6
+ - address: 192.168.0.118
+ apn: internet
################################################################################
# GTP-C Serveropen5gs/install/etc/open5gs/smf1.yaml
--- smf.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ smf1.yaml 2024-03-26 21:40:41.665942424 +0900
@@ -1,5 +1,5 @@
logger:
- file: /root/open5gs/install/var/log/open5gs/smf.log
+ file: /root/open5gs/install/var/log/open5gs/smf1.log
# level: info # fatal|error|warn|info(default)|debug|trace
global:
@@ -8,46 +8,36 @@
# peer: 64
smf:
- sbi:
- server:
- - address: 127.0.0.4
- port: 7777
- client:
-# nrf:
-# - uri: http://127.0.0.10:7777
- scp:
- - uri: http://127.0.0.200:7777
pfcp:
server:
- - address: 127.0.0.4
+ - address: 192.168.0.113
client:
upf:
- - address: 127.0.0.7
+ - address: 192.168.0.117
+ dnn: internet
gtpc:
server:
- address: 127.0.0.4
gtpu:
server:
- - address: 127.0.0.4
+ - address: 192.168.0.113
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/smf1.conf
################################################################################
# SMF Infoopen5gs/install/etc/open5gs/smf2.yaml
--- smf.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ smf2.yaml 2024-03-26 21:43:03.901126326 +0900
@@ -1,5 +1,5 @@
logger:
- file: /root/open5gs/install/var/log/open5gs/smf.log
+ file: /root/open5gs/install/var/log/open5gs/smf2.log
# level: info # fatal|error|warn|info(default)|debug|trace
global:
@@ -8,46 +8,36 @@
# peer: 64
smf:
- sbi:
- server:
- - address: 127.0.0.4
- port: 7777
- client:
-# nrf:
-# - uri: http://127.0.0.10:7777
- scp:
- - uri: http://127.0.0.200:7777
pfcp:
server:
- - address: 127.0.0.4
+ - address: 192.168.0.115
client:
upf:
- - address: 127.0.0.7
+ - address: 192.168.0.119
+ dnn: internet
gtpc:
server:
- - address: 127.0.0.4
+ - address: 127.0.0.24
gtpu:
server:
- - address: 127.0.0.4
+ - address: 192.168.0.115
metrics:
server:
- - address: 127.0.0.4
+ - address: 127.0.0.24
port: 9090
session:
- - subnet: 10.45.0.1/16
- - subnet: 2001:db8:cafe::1/48
+ - subnet: 10.46.0.1/16
+ 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/smf2.conf
################################################################################
# SMF Infoopen5gs/install/etc/open5gs/pcrf1.yaml
--- pcrf.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ pcrf1.yaml 2024-03-26 21:20:14.892315834 +0900
@@ -1,6 +1,6 @@
db_uri: mongodb://localhost/open5gs
logger:
- file: /root/open5gs/install/var/log/open5gs/pcrf.log
+ file: /root/open5gs/install/var/log/open5gs/pcrf1.log
# level: info # fatal|error|warn|info(default)|debug|trace
global:
@@ -8,7 +8,7 @@
ue: 1024 # The number of UE can be increased depending on memory size.
# peer: 64
pcrf:
- freeDiameter: /root/open5gs/install/etc/freeDiameter/pcrf.conf
+ freeDiameter: /root/open5gs/install/etc/freeDiameter/pcrf1.conf
################################################################################
# Locally configured policyopen5gs/install/etc/open5gs/pcrf2.yaml
--- pcrf.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ pcrf2.yaml 2024-03-26 21:20:44.598488192 +0900
@@ -1,6 +1,6 @@
db_uri: mongodb://localhost/open5gs
logger:
- file: /root/open5gs/install/var/log/open5gs/pcrf.log
+ file: /root/open5gs/install/var/log/open5gs/pcrf2.log
# level: info # fatal|error|warn|info(default)|debug|trace
global:
@@ -8,7 +8,7 @@
ue: 1024 # The number of UE can be increased depending on memory size.
# peer: 64
pcrf:
- freeDiameter: /root/open5gs/install/etc/freeDiameter/pcrf.conf
+ freeDiameter: /root/open5gs/install/etc/freeDiameter/pcrf2.conf
################################################################################
# Locally configured policy-
open5gs/install/etc/freeDiameter/smf1.conf
smf1.confis equal to the originalsmf.conf. -
open5gs/install/etc/freeDiameter/smf2.conf
--- smf.conf.orig 2023-04-30 00:53:22.000000000 +0900
+++ smf2.conf 2023-05-03 11:20:46.000000000 +0900
@@ -79,7 +79,7 @@
#ListenOn = "202.249.37.5";
#ListenOn = "2001:200:903:2::202:1";
#ListenOn = "fe80::21c:5ff:fe98:7d62%eth0";
-ListenOn = "127.0.0.4";
+ListenOn = "127.0.0.24";
##############################################################
@@ -261,7 +261,7 @@
# Examples:
#ConnectPeer = "aaa.wide.ad.jp";
#ConnectPeer = "old.diameter.serv" { TcTimer = 60; TLS_old_method; No_SCTP; Port=3868; } ;
-ConnectPeer = "pcrf.localdomain" { ConnectTo = "127.0.0.9"; No_TLS; };
+ConnectPeer = "pcrf.localdomain" { ConnectTo = "127.0.0.29"; No_TLS; };
##############################################################-
open5gs/install/etc/freeDiameter/pcrf1.conf
pcrf1.confis equal to the originalpcrf.conf. -
open5gs/install/etc/freeDiameter/pcrf2.conf
--- pcrf.conf.orig 2023-04-30 00:53:22.000000000 +0900
+++ pcrf2.conf 2023-05-07 18:32:04.246141671 +0900
@@ -79,7 +79,7 @@
#ListenOn = "202.249.37.5";
#ListenOn = "2001:200:903:2::202:1";
#ListenOn = "fe80::21c:5ff:fe98:7d62%eth0";
-ListenOn = "127.0.0.9";
+ListenOn = "127.0.0.29";
##############################################################
@@ -261,6 +261,6 @@
# Examples:
#ConnectPeer = "aaa.wide.ad.jp";
#ConnectPeer = "old.diameter.serv" { TcTimer = 60; TLS_old_method; No_SCTP; Port=3868; } ;
-ConnectPeer = "smf.localdomain" { ConnectTo = "127.0.0.4"; No_TLS; };
+ConnectPeer = "smf.localdomain" { ConnectTo = "127.0.0.24"; No_TLS; };open5gs/install/etc/open5gs/sgwu.yaml
--- sgwu.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ sgwu.yaml 2024-03-26 21:27:23.904812158 +0900
@@ -10,13 +10,13 @@
sgwu:
pfcp:
server:
- - address: 127.0.0.6
+ - address: 192.168.0.116
client:
# sgwc: # SGW-U PFCP Client try to associate SGW-C PFCP Server
# - address: 127.0.0.3
gtpu:
server:
- - address: 127.0.0.6
+ - address: 192.168.0.116
################################################################################
# PFCP Serveropen5gs/install/etc/open5gs/upf.yaml
--- upf.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ upf.yaml 2024-03-26 21:28:47.034199450 +0900
@@ -10,16 +10,17 @@
upf:
pfcp:
server:
- - address: 127.0.0.7
+ - address: 192.168.0.117
client:
# smf: # UPF PFCP Client try to associate SMF PFCP Server
# - address: 127.0.0.4
gtpu:
server:
- - address: 127.0.0.7
+ - address: 192.168.0.117
session:
- subnet: 10.45.0.1/16
- - subnet: 2001:db8:cafe::1/48
+ dnn: internet
+ dev: ogstun
metrics:
server:
- address: 127.0.0.7open5gs/install/etc/open5gs/sgwu.yaml
--- sgwu.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ sgwu.yaml 2024-03-26 21:30:55.482070178 +0900
@@ -10,13 +10,13 @@
sgwu:
pfcp:
server:
- - address: 127.0.0.6
+ - address: 192.168.0.118
client:
# sgwc: # SGW-U PFCP Client try to associate SGW-C PFCP Server
# - address: 127.0.0.3
gtpu:
server:
- - address: 127.0.0.6
+ - address: 192.168.0.118
################################################################################
# PFCP Serveropen5gs/install/etc/open5gs/upf.yaml
--- upf.yaml.orig 2024-03-24 15:36:48.000000000 +0900
+++ upf.yaml 2024-03-26 21:32:08.918140789 +0900
@@ -10,16 +10,17 @@
upf:
pfcp:
server:
- - address: 127.0.0.7
+ - address: 192.168.0.119
client:
# smf: # UPF PFCP Client try to associate SMF PFCP Server
# - address: 127.0.0.4
gtpu:
server:
- - address: 127.0.0.7
+ - address: 192.168.0.119
session:
- - subnet: 10.45.0.1/16
- - subnet: 2001:db8:cafe::1/48
+ - subnet: 10.46.0.1/16
+ dnn: internet
+ dev: ogstun
metrics:
server:
- address: 127.0.0.7srsRAN_4G/build/srsenb/enb.conf
--- enb.conf.example 2024-02-03 23:26:02.000000000 +0900
+++ enb.conf 2024-03-26 22:22:42.897283128 +0900
@@ -22,9 +22,9 @@
enb_id = 0x19B
mcc = 001
mnc = 01
-mme_addr = 127.0.1.100
-gtp_bind_addr = 127.0.1.1
-s1c_bind_addr = 127.0.1.1
+mme_addr = 192.168.0.111
+gtp_bind_addr = 192.168.0.121
+s1c_bind_addr = 192.168.0.121
s1c_bind_port = 0
n_prb = 50
#tm = 4
@@ -80,8 +80,8 @@
#time_adv_nsamples = auto
# Example for ZMQ-based operation with TCP transport for I/Q samples
-#device_name = zmq
-#device_args = fail_on_disconnect=true,tx_port=tcp://*:2000,rx_port=tcp://localhost:2001,id=enb,base_srate=23.04e6
+device_name = zmq
+device_args = fail_on_disconnect=true,tx_port=tcp://192.168.0.121:2000,rx_port=tcp://192.168.0.123:2001,id=enb,base_srate=23.04e6
#####################################################################
# Packet capture configurationsrsRAN_4G/build/srsenb/rr.conf
--- rr.conf.example 2024-02-03 23:26:02.000000000 +0900
+++ rr.conf 2023-05-02 11:52:54.000000000 +0900
@@ -55,7 +55,7 @@
{
// rf_port = 0;
cell_id = 0x01;
- tac = 0x0007;
+ tac = 0x0001;
pci = 1;
// root_seq_idx = 204;
dl_earfcn = 3350;srsRAN_4G/build/srsenb/enb.conf
--- enb.conf.example 2024-02-03 23:26:02.000000000 +0900
+++ enb.conf 2024-03-26 22:22:23.396225954 +0900
@@ -19,12 +19,12 @@
#
#####################################################################
[enb]
-enb_id = 0x19B
+enb_id = 0x19C
mcc = 001
mnc = 01
-mme_addr = 127.0.1.100
-gtp_bind_addr = 127.0.1.1
-s1c_bind_addr = 127.0.1.1
+mme_addr = 192.168.0.111
+gtp_bind_addr = 192.168.0.122
+s1c_bind_addr = 192.168.0.122
s1c_bind_port = 0
n_prb = 50
#tm = 4
@@ -80,8 +80,8 @@
#time_adv_nsamples = auto
# Example for ZMQ-based operation with TCP transport for I/Q samples
-#device_name = zmq
-#device_args = fail_on_disconnect=true,tx_port=tcp://*:2000,rx_port=tcp://localhost:2001,id=enb,base_srate=23.04e6
+device_name = zmq
+device_args = fail_on_disconnect=true,tx_port=tcp://192.168.0.122:2000,rx_port=tcp://192.168.0.124:2001,id=enb,base_srate=23.04e6
#####################################################################
# Packet capture configurationsrsRAN_4G/build/srsenb/rr.conf
--- rr.conf.example 2024-02-03 23:26:02.000000000 +0900
+++ rr.conf 2024-03-26 22:05:16.860031943 +0900
@@ -55,7 +55,7 @@
{
// rf_port = 0;
cell_id = 0x01;
- tac = 0x0007;
+ tac = 0x0002;
pci = 1;
// root_seq_idx = 204;
dl_earfcn = 3350;srsRAN_4G/build/srsue/ue-loc1.conf
--- ue.conf.example 2024-02-03 23:26:02.000000000 +0900
+++ ue-loc1.conf 2024-03-26 22:07:25.360060344 +0900
@@ -42,8 +42,8 @@
#continuous_tx = auto
# Example for ZMQ-based operation with TCP transport for I/Q samples
-#device_name = zmq
-#device_args = tx_port=tcp://*:2001,rx_port=tcp://localhost:2000,id=ue,base_srate=23.04e6
+device_name = zmq
+device_args = tx_port=tcp://192.168.0.123:2001,rx_port=tcp://192.168.0.121:2000,id=ue,base_srate=23.04e6
#####################################################################
# EUTRA RAT configuration
@@ -139,9 +139,9 @@
[usim]
mode = soft
algo = milenage
-opc = 63BFA50EE6523365FF14C1F45F88737D
-k = 00112233445566778899aabbccddeeff
-imsi = 001010123456780
+opc = E8ED289DEBA952E4283B54E88E6183CA
+k = 465B5CE8B199B49FAA5F0A2EE238A6BC
+imsi = 001010000000100
imei = 353490069873319
#reader =
#pin = 1234
@@ -180,8 +180,8 @@
# Supported: 0 - NULL, 1 - Snow3G, 2 - AES, 3 - ZUC
#####################################################################
[nas]
-#apn = internetinternet
-#apn_protocol = ipv4
+apn = internet
+apn_protocol = ipv4
#user = srsuser
#pass = srspass
#force_imsi_attach = falsesrsRAN_4G/build/srsue/ue-loc2.conf
--- ue.conf.example 2024-02-03 23:26:02.000000000 +0900
+++ ue-loc2.conf 2024-03-26 22:10:41.453215867 +0900
@@ -42,8 +42,8 @@
#continuous_tx = auto
# Example for ZMQ-based operation with TCP transport for I/Q samples
-#device_name = zmq
-#device_args = tx_port=tcp://*:2001,rx_port=tcp://localhost:2000,id=ue,base_srate=23.04e6
+device_name = zmq
+device_args = tx_port=tcp://192.168.0.124:2001,rx_port=tcp://192.168.0.122:2000,id=ue,base_srate=23.04e6
#####################################################################
# EUTRA RAT configuration
@@ -139,9 +139,9 @@
[usim]
mode = soft
algo = milenage
-opc = 63BFA50EE6523365FF14C1F45F88737D
-k = 00112233445566778899aabbccddeeff
-imsi = 001010123456780
+opc = E8ED289DEBA952E4283B54E88E6183CA
+k = 465B5CE8B199B49FAA5F0A2EE238A6BC
+imsi = 001010000000100
imei = 353490069873319
#reader =
#pin = 1234
@@ -180,8 +180,8 @@
# Supported: 0 - NULL, 1 - Snow3G, 2 - AES, 3 - ZUC
#####################################################################
[nas]
-#apn = internetinternet
-#apn_protocol = ipv4
+apn = internet
+apn_protocol = ipv4
#user = srsuser
#pass = srspass
#force_imsi_attach = falseAdd IP addresses for SGW-C1/SMF1(PGW-C) and SGW-C2/SMF2(PGW-C).
ip addr add 192.168.0.112/24 dev enp0s8
ip addr add 192.168.0.113/24 dev enp0s8
ip addr add 192.168.0.114/24 dev enp0s8
ip addr add 192.168.0.115/24 dev enp0s8
Note. enp0s8 is the network interface of 192.168.0.0/24 in my VirtualBox environment.
Please change it according to your environment.
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, add IP address for UPF(PGW-U) and configure the TUNnel interface and NAPT.
ip addr add 192.168.0.117/24 dev enp0s8
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
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, add IP address for UPF(PGW-U) and configure the TUNnel interface and NAPT.
ip addr add 192.168.0.119/24 dev enp0s8
ip tuntap add name ogstun mode tun
ip addr add 10.46.0.1/16 dev ogstun
ip link set ogstun up
iptables -t nat -A POSTROUTING -s 10.46.0.0/16 ! -o ogstun -j MASQUERADE
Add IP address for UE in Loc2.
ip addr add 192.168.0.124/24 dev enp0s8
Please refer to the following for building Open5GS and srsRAN 4G ZMQ UE / RAN respectively.
- Open5GS v2.7.0 (2024.03.24) - https://open5gs.org/open5gs/docs/guide/02-building-open5gs-from-sources/
- srsRAN 4G (2024.02.01) - https://github.com/s5uishida/build_srsran_4g_zmq_disable_rf_plugins
Install MongoDB on Open5GS EPC C-Plane machine. It is not necessary to install MongoDB on Open5GS EPC U-Plane machines. MongoDB Compass is a convenient tool to look at the MongoDB database.
I will confirm in the following scenario. The reasons to confirm in such a scenario are as follows:
- In the current Open5GS, SGW changes occurs only at TAU/Handover.
The reason for srsRAN 4G with ZMQ
- For a clean tear down, the UE needs to be terminated first, then the eNB.
- eNB and UE can only run once, after the UE has been detached, the eNB needs to be restarted.
- Currently a single eNB and a single UE are only supported.
This scenario:
1) EPC start
C-Plane start
|
V
U-Plane1 start
|
V
U-Plane2 start
2) eNodeB1/UE(Loc1) start, ping and eNodeB1/UE(Loc1) stop
eNodeB1 start
|
V
UE(Loc1) start
|
V
ping google.com -I tun_srsue -n
|
V
UE(Loc1) stop
|
V
eNodeB1 stop
3) MME restart
4) eNodeB2/UE(Loc2) start, ping and eNodeB2/UE(Loc2) stop
eNodeB2 start
|
V
UE(Loc2) start
|
V
ping google.com -I tun_srsue -n
|
V
UE(Loc2) stop
|
V
eNodeB2 stop
Note. This scenario is just for confirming the function, and I think that restarting MME to change SGW is not proper for real usage.
First, run Open5GS EPC C-Plane.
- Open5GS EPC C-Plane
./install/bin/open5gs-mmed &
./install/bin/open5gs-sgwcd -c install/etc/open5gs/sgwc1.yaml &
./install/bin/open5gs-sgwcd -c install/etc/open5gs/sgwc2.yaml &
./install/bin/open5gs-smfd -c install/etc/open5gs/smf1.yaml &
./install/bin/open5gs-smfd -c install/etc/open5gs/smf2.yaml &
./install/bin/open5gs-hssd &
./install/bin/open5gs-pcrfd -c install/etc/open5gs/pcrf1.yaml &
./install/bin/open5gs-pcrfd -c install/etc/open5gs/pcrf2.yaml &
Next, run Open5GS EPC U-Planes.
- Open5GS EPC U-Plane1
./install/bin/open5gs-sgwud &
./install/bin/open5gs-upfd &
- Open5GS EPC U-Plane2
./install/bin/open5gs-sgwud &
./install/bin/open5gs-upfd &
Then run tcpdump on one more terminal for each U-Plane.
- Run
tcpdumpon VM2 (U-Plane1)
# 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
- Run
tcpdumpon VM3 (U-Plane2)
# 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
Run srsRAN 4G ZMQ RAN (eNodeB1) and connect to Open5GS EPC.
# cd srsRAN_4G/build/srsenb
# ./src/srsenb enb.conf
--- Software Radio Systems LTE eNodeB ---
Reading configuration file enb.conf...
Built in Release mode using commit ec29b0c1f on branch master.
Opening 1 channels in RF device=zmq with args=fail_on_disconnect=true,tx_port=tcp://192.168.0.121:2000,rx_port=tcp://192.168.0.123:2001,id=enb,base_srate=23.04e6
Supported RF device list: zmq file
CHx base_srate=23.04e6
CHx id=enb
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
CH0 rx_port=tcp://192.168.0.123:2001
CH0 tx_port=tcp://192.168.0.121:2000
CH0 fail_on_disconnect=true
==== eNodeB started ===
Type <t> to view trace
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation)
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation)
Setting frequency: DL=2680.0 Mhz, UL=2560.0 MHz for cc_idx=0 nof_prb=50
The Open5GS C-Plane log when executed is as follows.
03/26 22:52:28.575: [mme] INFO: eNB-S1 accepted[192.168.0.121]:46778 in s1_path module (../src/mme/s1ap-sctp.c:114)
03/26 22:52:28.575: [mme] INFO: eNB-S1 accepted[192.168.0.121] in master_sm module (../src/mme/mme-sm.c:108)
03/26 22:52:28.575: [mme] INFO: [Added] Number of eNBs is now 1 (../src/mme/mme-context.c:2829)
03/26 22:52:28.575: [mme] INFO: eNB-S1[192.168.0.121] max_num_of_ostreams : 30 (../src/mme/mme-sm.c:150)
Run srsRAN 4G ZMQ UE (ue-loc1.conf), connect to eNodeB1 in Loc1 and connect to Open5GS EPC.
# cd srsRAN_4G/build/srsue
# ./src/srsue ue-loc1.conf
Reading configuration file ue-loc1.conf...
Built in Release mode using commit ec29b0c1f on branch master.
Opening 1 channels in RF device=zmq with args=tx_port=tcp://192.168.0.123:2001,rx_port=tcp://192.168.0.121:2000,id=ue,base_srate=23.04e6
Supported RF device list: zmq file
CHx base_srate=23.04e6
CHx id=ue
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://192.168.0.123:2001
Waiting PHY to initialize ... done!
Attaching UE...
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
.
Found Cell: Mode=FDD, PCI=1, PRB=50, Ports=1, CP=Normal, CFO=-0.2 KHz
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation)
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation)
Found PLMN: Id=00101, TAC=1
Random Access Transmission: seq=35, tti=181, ra-rnti=0x2
RRC Connected
Random Access Complete. c-rnti=0x46, ta=0
Network attach successful. IP: 10.45.0.2
nTp) ((t) 26/3/2024 13:53:21 TZ:99
The Open5GS C-Plane log when executed is as follows.
03/26 22:53:20.522: [mme] INFO: InitialUEMessage (../src/mme/s1ap-handler.c:406)
03/26 22:53:20.522: [mme] INFO: [Added] Number of eNB-UEs is now 1 (../src/mme/mme-context.c:4735)
03/26 22:53:20.522: [mme] INFO: Unknown UE by S_TMSI[G:2,C:1,M_TMSI:0xc0000146] (../src/mme/s1ap-handler.c:485)
03/26 22:53:20.522: [mme] INFO: ENB_UE_S1AP_ID[1] MME_UE_S1AP_ID[1] TAC[1] CellID[0x19b01] (../src/mme/s1ap-handler.c:585)
03/26 22:53:20.522: [mme] INFO: Unknown UE by GUTI[G:2,C:1,M_TMSI:0xc0000146] (../src/mme/mme-context.c:3586)
03/26 22:53:20.523: [mme] INFO: [Added] Number of MME-UEs is now 1 (../src/mme/mme-context.c:3379)
03/26 22:53:20.523: [emm] INFO: [] Attach request (../src/mme/emm-sm.c:423)
03/26 22:53:20.523: [emm] INFO: GUTI[G:2,C:1,M_TMSI:0xc0000146] IMSI[Unknown IMSI] (../src/mme/emm-handler.c:236)
03/26 22:53:20.587: [emm] INFO: Identity response (../src/mme/emm-sm.c:393)
03/26 22:53:20.587: [emm] INFO: IMSI[001010000000100] (../src/mme/emm-handler.c:428)
03/26 22:53:20.689: [mme] INFO: [Added] Number of MME-Sessions is now 1 (../src/mme/mme-context.c:4749)
03/26 22:53:20.753: [sgwc] INFO: [Added] Number of SGWC-UEs is now 1 (../src/sgwc/context.c:239)
03/26 22:53:20.753: [sgwc] INFO: [Added] Number of SGWC-Sessions is now 1 (../src/sgwc/context.c:882)
03/26 22:53:20.753: [sgwc] INFO: UE IMSI[001010000000100] APN[internet] (../src/sgwc/s11-handler.c:239)
03/26 22:53:20.754: [gtp] INFO: gtp_connect() [127.0.0.4]:2123 (../lib/gtp/path.c:60)
03/26 22:53:20.754: [smf] INFO: [Added] Number of SMF-UEs is now 1 (../src/smf/context.c:1019)
03/26 22:53:20.754: [smf] INFO: [Added] Number of SMF-Sessions is now 1 (../src/smf/context.c:3090)
03/26 22:53:20.754: [smf] INFO: UE IMSI[001010000000100] APN[internet] IPv4[10.45.0.2] IPv6[] (../src/smf/s5c-handler.c:275)
03/26 22:53:20.758: [gtp] INFO: gtp_connect() [192.168.0.117]:2152 (../lib/gtp/path.c:60)
03/26 22:53:21.058: [emm] INFO: [001010000000100] Attach complete (../src/mme/emm-sm.c:1384)
03/26 22:53:21.059: [emm] INFO: IMSI[001010000000100] (../src/mme/emm-handler.c:275)
03/26 22:53:21.059: [emm] INFO: UTC [2024-03-26T13:53:21] Timezone[0]/DST[0] (../src/mme/emm-handler.c:281)
03/26 22:53:21.059: [emm] INFO: LOCAL [2024-03-26T22:53:21] Timezone[32400]/DST[0] (../src/mme/emm-handler.c:285)
The Open5GS U-Plane1 log when executed is as follows.
03/26 22:53:20.769: [sgwu] INFO: UE F-SEID[UP:0x180 CP:0x3e4] (../src/sgwu/context.c:171)
03/26 22:53:20.769: [sgwu] INFO: [Added] Number of SGWU-Sessions is now 1 (../src/sgwu/context.c:176)
03/26 22:53:20.773: [upf] INFO: [Added] Number of UPF-Sessions is now 1 (../src/upf/context.c:208)
03/26 22:53:20.773: [gtp] INFO: gtp_connect() [192.168.0.116]:2152 (../lib/gtp/path.c:60)
03/26 22:53:20.773: [gtp] INFO: gtp_connect() [192.168.0.113]:2152 (../lib/gtp/path.c:60)
03/26 22:53:20.773: [upf] INFO: UE F-SEID[UP:0x6cd CP:0x8da] APN[internet] PDN-Type[1] IPv4[10.45.0.2] IPv6[] (../src/upf/context.c:485)
03/26 22:53:20.773: [upf] INFO: UE F-SEID[UP:0x6cd CP:0x8da] APN[internet] PDN-Type[1] IPv4[10.45.0.2] IPv6[] (../src/upf/context.c:485)
03/26 22:53:20.774: [gtp] INFO: gtp_connect() [192.168.0.117]:2152 (../lib/gtp/path.c:60)
03/26 22:53:21.076: [gtp] INFO: gtp_connect() [192.168.0.121]:2152 (../lib/gtp/path.c:60)
The result of ip addr show on VM6 (UE) is as follows.
# ip addr show
...
8: 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
...
Confirm by using tcpdump that the packet goes through if=ogstun on U-Plane1.
# ping google.com -I tun_srsue -n
PING google.com (142.250.207.14) from 10.45.0.2 tun_srsue: 56(84) bytes of data.
64 bytes from 142.250.207.14: icmp_seq=1 ttl=61 time=371 ms
64 bytes from 142.250.207.14: icmp_seq=2 ttl=61 time=86.4 ms
64 bytes from 142.250.207.14: icmp_seq=3 ttl=61 time=97.0 ms
The tcpdump log on U-Plane1 is as follows.
22:55:00.370286 IP 10.45.0.2 > 142.250.207.14: ICMP echo request, id 5, seq 1, length 64
22:55:00.419638 IP 142.250.207.14 > 10.45.0.2: ICMP echo reply, id 5, seq 1, length 64
22:55:01.181410 IP 10.45.0.2 > 142.250.207.14: ICMP echo request, id 5, seq 2, length 64
22:55:01.217645 IP 142.250.207.14 > 10.45.0.2: ICMP echo reply, id 5, seq 2, length 64
22:55:02.193876 IP 10.45.0.2 > 142.250.207.14: ICMP echo request, id 5, seq 3, length 64
22:55:02.228175 IP 142.250.207.14 > 10.45.0.2: ICMP echo reply, id 5, seq 3, length 64
Note. Make sure the packet does not go through U-Plane2. The UE connects to the PDN of U-Plane1 in the same Loc1 according to the connected eNodeB1 in Loc1.
After this, stop eNodeB1 and UE in preparation for confirming Loc2 with TAC=2.
Restart Open5GS MME in preparation for confirming Loc2 with TAC=2.
pkill open5gs-mmed
./install/bin/open5gs-mmed &
Run srsRAN 4G ZMQ RAN (eNodeB2) and connect to Open5GS EPC.
# cd srsRAN_4G/build/srsenb
# ./src/srsenb enb.conf
--- Software Radio Systems LTE eNodeB ---
Reading configuration file enb.conf...
Built in Release mode using commit ec29b0c1f on branch master.
Opening 1 channels in RF device=zmq with args=fail_on_disconnect=true,tx_port=tcp://192.168.0.122:2000,rx_port=tcp://192.168.0.124:2001,id=enb,base_srate=23.04e6
Supported RF device list: zmq file
CHx base_srate=23.04e6
CHx id=enb
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
CH0 rx_port=tcp://192.168.0.124:2001
CH0 tx_port=tcp://192.168.0.122:2000
CH0 fail_on_disconnect=true
==== eNodeB started ===
Type <t> to view trace
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation)
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation)
Setting frequency: DL=2680.0 Mhz, UL=2560.0 MHz for cc_idx=0 nof_prb=50
The Open5GS C-Plane log when executed is as follows.
03/26 22:59:43.919: [mme] INFO: eNB-S1 accepted[192.168.0.122]:35945 in s1_path module (../src/mme/s1ap-sctp.c:114)
03/26 22:59:43.919: [mme] INFO: eNB-S1 accepted[192.168.0.122] in master_sm module (../src/mme/mme-sm.c:108)
03/26 22:59:43.919: [mme] INFO: [Added] Number of eNBs is now 1 (../src/mme/mme-context.c:2829)
03/26 22:59:43.919: [mme] INFO: eNB-S1[192.168.0.122] max_num_of_ostreams : 30 (../src/mme/mme-sm.c:150)
Run srsRAN 4G ZMQ UE (ue-loc2.conf), connect to eNodeB2 in Loc2 and connect to Open5GS EPC.
# cd srsRAN_4G/build/srsue
# ./src/srsue ue-loc2.conf
Reading configuration file ue-loc2.conf...
Built in Release mode using commit ec29b0c1f on branch master.
Opening 1 channels in RF device=zmq with args=tx_port=tcp://192.168.0.124:2001,rx_port=tcp://192.168.0.122:2000,id=ue,base_srate=23.04e6
Supported RF device list: zmq file
CHx base_srate=23.04e6
CHx id=ue
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
CH0 rx_port=tcp://192.168.0.122:2000
CH0 tx_port=tcp://192.168.0.124:2001
Waiting PHY to initialize ... done!
Attaching UE...
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
.
Found Cell: Mode=FDD, PCI=1, PRB=50, Ports=1, CP=Normal, CFO=-0.2 KHz
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation)
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation)
Found PLMN: Id=00101, TAC=2
Random Access Transmission: seq=14, tti=181, ra-rnti=0x2
RRC Connected
Random Access Complete. c-rnti=0x46, ta=0
Network attach successful. IP: 10.46.0.2
nTp) ((t) 26/3/2024 14:1:15 TZ:99
The Open5GS C-Plane log when executed is as follows.
03/26 23:01:14.682: [mme] INFO: InitialUEMessage (../src/mme/s1ap-handler.c:406)
03/26 23:01:14.682: [mme] INFO: [Added] Number of eNB-UEs is now 1 (../src/mme/mme-context.c:4735)
03/26 23:01:14.682: [mme] INFO: Unknown UE by S_TMSI[G:2,C:1,M_TMSI:0xc0000614] (../src/mme/s1ap-handler.c:485)
03/26 23:01:14.682: [mme] INFO: ENB_UE_S1AP_ID[1] MME_UE_S1AP_ID[1] TAC[2] CellID[0x19c01] (../src/mme/s1ap-handler.c:585)
03/26 23:01:14.682: [mme] INFO: Unknown UE by GUTI[G:2,C:1,M_TMSI:0xc0000614] (../src/mme/mme-context.c:3586)
03/26 23:01:14.682: [mme] INFO: [Added] Number of MME-UEs is now 1 (../src/mme/mme-context.c:3379)
03/26 23:01:14.682: [emm] INFO: [] Attach request (../src/mme/emm-sm.c:423)
03/26 23:01:14.682: [emm] INFO: GUTI[G:2,C:1,M_TMSI:0xc0000614] IMSI[Unknown IMSI] (../src/mme/emm-handler.c:236)
03/26 23:01:14.720: [emm] INFO: Identity response (../src/mme/emm-sm.c:393)
03/26 23:01:14.721: [emm] INFO: IMSI[001010000000100] (../src/mme/emm-handler.c:428)
03/26 23:01:14.839: [mme] INFO: [Added] Number of MME-Sessions is now 1 (../src/mme/mme-context.c:4749)
03/26 23:01:14.910: [sgwc] INFO: [Added] Number of SGWC-UEs is now 1 (../src/sgwc/context.c:239)
03/26 23:01:14.910: [sgwc] INFO: [Added] Number of SGWC-Sessions is now 1 (../src/sgwc/context.c:882)
03/26 23:01:14.910: [sgwc] INFO: UE IMSI[001010000000100] APN[internet] (../src/sgwc/s11-handler.c:239)
03/26 23:01:14.911: [gtp] INFO: gtp_connect() [127.0.0.24]:2123 (../lib/gtp/path.c:60)
03/26 23:01:14.911: [smf] INFO: [Added] Number of SMF-UEs is now 1 (../src/smf/context.c:1019)
03/26 23:01:14.911: [smf] INFO: [Added] Number of SMF-Sessions is now 1 (../src/smf/context.c:3090)
03/26 23:01:14.912: [smf] INFO: UE IMSI[001010000000100] APN[internet] IPv4[10.46.0.2] IPv6[] (../src/smf/s5c-handler.c:275)
03/26 23:01:14.915: [gtp] INFO: gtp_connect() [192.168.0.119]:2152 (../lib/gtp/path.c:60)
03/26 23:01:15.226: [emm] INFO: [001010000000100] Attach complete (../src/mme/emm-sm.c:1384)
03/26 23:01:15.227: [emm] INFO: IMSI[001010000000100] (../src/mme/emm-handler.c:275)
03/26 23:01:15.227: [emm] INFO: UTC [2024-03-26T14:01:15] Timezone[0]/DST[0] (../src/mme/emm-handler.c:281)
03/26 23:01:15.227: [emm] INFO: LOCAL [2024-03-26T23:01:15] Timezone[32400]/DST[0] (../src/mme/emm-handler.c:285)
The Open5GS U-Plane2 log when executed is as follows.
03/26 23:01:14.958: [sgwu] INFO: UE F-SEID[UP:0xae0 CP:0x712] (../src/sgwu/context.c:171)
03/26 23:01:14.958: [sgwu] INFO: [Added] Number of SGWU-Sessions is now 1 (../src/sgwu/context.c:176)
03/26 23:01:14.961: [upf] INFO: [Added] Number of UPF-Sessions is now 1 (../src/upf/context.c:208)
03/26 23:01:14.961: [gtp] INFO: gtp_connect() [192.168.0.118]:2152 (../lib/gtp/path.c:60)
03/26 23:01:14.961: [gtp] INFO: gtp_connect() [192.168.0.115]:2152 (../lib/gtp/path.c:60)
03/26 23:01:14.961: [upf] INFO: UE F-SEID[UP:0x714 CP:0xa94] APN[internet] PDN-Type[1] IPv4[10.46.0.2] IPv6[] (../src/upf/context.c:485)
03/26 23:01:14.961: [upf] INFO: UE F-SEID[UP:0x714 CP:0xa94] APN[internet] PDN-Type[1] IPv4[10.46.0.2] IPv6[] (../src/upf/context.c:485)
03/26 23:01:14.962: [gtp] INFO: gtp_connect() [192.168.0.119]:2152 (../lib/gtp/path.c:60)
03/26 23:01:15.274: [gtp] INFO: gtp_connect() [192.168.0.122]:2152 (../lib/gtp/path.c:60)
The result of ip addr show on VM6 (UE) is as follows.
# ip addr show
...
10: tun_srsue: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 500
link/none
inet 10.46.0.2/24 scope global tun_srsue
valid_lft forever preferred_lft forever
...
Confirm by using tcpdump that the packet goes through if=ogstun on U-Plane2.
# ping google.com -I tun_srsue -n
PING google.com (142.250.207.14) from 10.46.0.2 tun_srsue: 56(84) bytes of data.
64 bytes from 142.250.207.14: icmp_seq=1 ttl=61 time=401 ms
64 bytes from 142.250.207.14: icmp_seq=2 ttl=61 time=117 ms
64 bytes from 142.250.207.14: icmp_seq=3 ttl=61 time=74.4 ms
The tcpdump log on U-Plane2 is as follows.
23:02:55.655558 IP 10.46.0.2 > 142.250.207.14: ICMP echo request, id 7, seq 1, length 64
23:02:55.696997 IP 142.250.207.14 > 10.46.0.2: ICMP echo reply, id 7, seq 1, length 64
23:02:56.486725 IP 10.46.0.2 > 142.250.207.14: ICMP echo request, id 7, seq 2, length 64
23:02:56.538326 IP 142.250.207.14 > 10.46.0.2: ICMP echo reply, id 7, seq 2, length 64
23:02:57.482311 IP 10.46.0.2 > 142.250.207.14: ICMP echo request, id 7, seq 3, length 64
23:02:57.497455 IP 142.250.207.14 > 10.46.0.2: ICMP echo reply, id 7, seq 3, length 64
Note. Make sure the packet does not go through U-Plane1. The UE connects to the PDN of U-Plane2 in the same Loc2 according to the connected eNodeB2 in Loc2.
This makes it to confirm that at Initial Attach, MME can select SMF(PGW-C) by TAC according to the connected eNodeB, and UE connects to SGW-U/UPF(PGW-U) in the same location. I would like to thank the excellent developers and all the contributors of Open5GS and srsRAN 4G.
- [2024.03.26] Updated to Open5GS v2.7.0 (2024.03.24).
- [2023.09.03] Updated Open5GS and srsRAN 4G.
- [2023.05.07] Initial release.