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https://github.com/s5uishida/open5gs_epc_srsran_nearby_upf_sample_config
Open5GS EPC & srsRAN 4G with ZeroMQ UE / RAN Sample Configuration - Select nearby UPF(PGW-U) according to the connected eNodeB
https://github.com/s5uishida/open5gs_epc_srsran_nearby_upf_sample_config
cups enodeb epc lte mme open5gs pgwc pgwu ran sgwc sgwu smf srsran ue upf zeromq
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Open5GS EPC & srsRAN 4G with ZeroMQ UE / RAN Sample Configuration - Select nearby UPF(PGW-U) according to the connected eNodeB
- Host: GitHub
- URL: https://github.com/s5uishida/open5gs_epc_srsran_nearby_upf_sample_config
- Owner: s5uishida
- Created: 2023-05-07T10:10:22.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2024-03-26T14:10:12.000Z (9 months ago)
- Last Synced: 2024-03-26T15:31:15.173Z (9 months ago)
- Topics: cups, enodeb, epc, lte, mme, open5gs, pgwc, pgwu, ran, sgwc, sgwu, smf, srsran, ue, upf, zeromq
- Homepage:
- Size: 386 KB
- Stars: 2
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# 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.
---
### [Sample Configurations and Miscellaneous for Mobile Network](https://github.com/s5uishida/sample_config_misc_for_mobile_network)
---
## Table of Contents
- [Overview of Open5GS CUPS-enabled EPC Simulation Mobile Network](#overview)
- [Changes in configuration files of Open5GS EPC and srsRAN 4G ZMQ UE / RAN](#changes)
- [Changes in configuration files of Open5GS EPC C-Plane](#changes_cp)
- [Changes in configuration files of Open5GS EPC U-Plane1](#changes_up1)
- [Changes in configuration files of Open5GS EPC U-Plane2](#changes_up2)
- [Changes in configuration files of srsRAN 4G ZMQ UE / RAN](#changes_srs)
- [Changes in configuration files of RAN (eNodeB1)](#changes_ran1)
- [Changes in configuration files of RAN (eNodeB2)](#changes_ran2)
- [Changes in configuration files of UE for Loc1 (IMSI-001010000000100)](#changes_ue_loc1)
- [Changes in configuration files of UE for Loc2 (IMSI-001010000000100)](#changes_ue_loc2)
- [Network settings of Open5GS EPC and srsRAN 4G ZMQ UE / RAN](#network_settings)
- [Network settings of Open5GS EPC C-Plane](#network_settings_cp)
- [Network settings of Open5GS EPC U-Plane1](#network_settings_up1)
- [Network settings of Open5GS EPC U-Plane2](#network_settings_up2)
- [Network settings of srsRAN 4G ZMQ UE](#network_settings_ue)
- [Build Open5GS and srsRAN 4G ZMQ UE / RAN](#build)
- [Run Open5GS EPC and srsRAN 4G ZMQ UE / RAN](#run)
- [Run Open5GS EPC C-Plane](#run_cp)
- [Run Open5GS EPC U-Plane1 & U-Plane2](#run_up)
- [Confirm in Loc1 (TAC=1)](#confirm_loc1)
- [Run srsRAN 4G ZMQ RAN (eNodeB1) with TAC=1 in Loc1](#run_ran1)
- [Run srsRAN 4G ZMQ UE (ue-loc1.conf) connected to eNodeB1 in Loc1](#run_ue1)
- [Ping google.com going through PDN=10.45.0.0/16 on Loc1](#ping_ue1)
- [Restart Open5GS MME](#restart_mme)
- [Confirm in Loc2 (TAC=2)](#confirm_loc2)
- [Run srsRAN 4G ZMQ RAN (eNodeB2) with TAC=2 in Loc2](#run_ran2)
- [Run srsRAN 4G ZMQ UE (ue-loc2.conf) connected to eNodeB2 in Loc2](#run_ue2)
- [Ping google.com going through PDN=10.46.0.0/16 on Loc2](#ping_ue2)
- [Changelog (summary)](#changelog)
## Overview of Open5GS CUPS-enabled EPC Simulation Mobile Network
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](https://www.3gpp.org/DynaReport/35208.htm) "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 |
## Changes in configuration files of Open5GS EPC and srsRAN 4G ZMQ UE / RAN
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
### Changes in configuration files of Open5GS EPC C-Plane
- `open5gs/install/etc/open5gs/mme.yaml`
```diff
--- 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`
```diff
--- 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 Server
```
- `open5gs/install/etc/open5gs/sgwc2.yaml`
```diff
--- 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 Server
```
- `open5gs/install/etc/open5gs/smf1.yaml`
```diff
--- 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 Info
```
- `open5gs/install/etc/open5gs/smf2.yaml`
```diff
--- 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 Info
```
- `open5gs/install/etc/open5gs/pcrf1.yaml`
```diff
--- 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 policy
```
- `open5gs/install/etc/open5gs/pcrf2.yaml`
```diff
--- 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.conf` is equal to the original `smf.conf`.
- `open5gs/install/etc/freeDiameter/smf2.conf`
```diff
--- 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.conf` is equal to the original `pcrf.conf`.
- `open5gs/install/etc/freeDiameter/pcrf2.conf`
```diff
--- 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; };
```
### Changes in configuration files of Open5GS EPC U-Plane1
- `open5gs/install/etc/open5gs/sgwu.yaml`
```diff
--- 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 Server
```
- `open5gs/install/etc/open5gs/upf.yaml`
```diff
--- 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: 127.0.0.7
```
### Changes in configuration files of Open5GS EPC U-Plane2
- `open5gs/install/etc/open5gs/sgwu.yaml`
```diff
--- 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 Server
```
- `open5gs/install/etc/open5gs/upf.yaml`
```diff
--- 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: 127.0.0.7
```
### Changes in configuration files of srsRAN 4G ZMQ UE / RAN
#### Changes in configuration files of RAN (eNodeB1)
- `srsRAN_4G/build/srsenb/enb.conf`
```diff
--- 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 configuration
```
- `srsRAN_4G/build/srsenb/rr.conf`
```diff
--- 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;
```
#### Changes in configuration files of RAN (eNodeB2)
- `srsRAN_4G/build/srsenb/enb.conf`
```diff
--- 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 configuration
```
- `srsRAN_4G/build/srsenb/rr.conf`
```diff
--- 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;
```
#### Changes in configuration files of UE for Loc1 (IMSI-001010000000100)
- `srsRAN_4G/build/srsue/ue-loc1.conf`
```diff
--- 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 = false
```
#### Changes in configuration files of UE for Loc2 (IMSI-001010000000100)
- `srsRAN_4G/build/srsue/ue-loc2.conf`
```diff
--- 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 = false
```
## Network settings of Open5GS EPC and srsRAN 4G ZMQ UE / RAN
### Network settings of Open5GS EPC C-Plane
Add 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.**
### Network settings of Open5GS EPC U-Plane1
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
```
### Network settings of Open5GS EPC U-Plane2
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
```
### Network settings of srsRAN 4G ZMQ UE
Add IP address for UE in Loc2.
```
ip addr add 192.168.0.124/24 dev enp0s8
```
## Build Open5GS and srsRAN 4G ZMQ UE / RAN
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](https://www.mongodb.com/products/compass) is a convenient tool to look at the MongoDB database.
## Run Open5GS EPC and srsRAN 4G ZMQ UE / RAN
I will confirm in the following scenario.
The reasons to confirm in such a scenario are as follows:
**[The reason for Open5GS](https://github.com/open5gs/open5gs/issues/1791)**
- In the current Open5GS, SGW changes occurs only at TAU/Handover.
**[The reason for srsRAN 4G with ZMQ](https://docs.srsran.com/projects/4g/en/latest/app_notes/source/zeromq/source/index.html#known-issues)**
- 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.**
### Run Open5GS EPC C-Plane
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 &
```
### Run Open5GS EPC U-Plane1 & U-Plane2
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 `tcpdump` on 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 `tcpdump` on 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
```
### Confirm in Loc1 (TAC=1)
#### Run srsRAN 4G ZMQ RAN (eNodeB1) with TAC=1 in Loc1
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 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) connected to eNodeB1 in Loc1
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: 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
...
```
#### Ping google.com going through PDN=10.45.0.0/16 on Loc1
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
Restart Open5GS MME in preparation for confirming Loc2 with TAC=2.
```
pkill open5gs-mmed
./install/bin/open5gs-mmed &
```
### Confirm in Loc2 (TAC=2)
#### Run srsRAN 4G ZMQ RAN (eNodeB2) with TAC=2 in Loc2
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 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) connected to eNodeB2 in Loc2
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: 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
...
```
#### Ping google.com going through PDN=10.46.0.0/16 on Loc2
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.
## Changelog (summary)
- [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.