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DOC: update L2 nFAPI simulator

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Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>
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Raphael Defosseux
2020-04-22 16:46:42 +02:00
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19
doc/L2NFAPI.md
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@@ -14,19 +14,24 @@
This simulator allows to test L2 and above Layers using the nFAPI interface.
The UE executable is able to "simulate" multiple UEs in order to stimulate the scheduler in the eNB.
**This simulator is available starting the `v1.0.0` release on the `master` branch.**
Currently the only validated deployment by CI and developers is *with S1 interface and eNB / UEs are on the same machine*.
Others deployments will be supported later after bug fixes and validation in the CI process.
1. [With S1 -- eNB and UE on same machine](L2NFAPI_S1.md)
Currently the Continuous Integration process is validating this simulator the following way:
* the LTE modem executable is run on one host (in our CI deployment it is a **Xenial Virtual Machine**)
* the UE(s) modem executable is run on another host (in our CI deployment it is also a **Xenial Virtual Machine**)
* We are testing:
* in S1 mode (ie we are connected to a 3rd-party EPC)
* in noS1 mode (no need for an EPC)
Normally it should be fine to run both executables on the same host using the `loopback` interface to communicate. **But we are not guaranting it**
1. [With S1 -- eNB and UE on 2 hosts](L2NFAPI_S1.md)
2. [No S1 -- eNB and UE on 2 hosts](L2NFAPI_NOS1.md)
----
[oai wiki home](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/home)

349
doc/L2NFAPI_NOS1.md Normal file
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@@ -0,0 +1,349 @@
<table style="border-collapse: collapse; border: none;">
<tr style="border-collapse: collapse; border: none;">
<td style="border-collapse: collapse; border: none;">
<a href="http://www.openairinterface.org/">
<img src="./images/oai_final_logo.png" alt="" border=3 height=50 width=150>
</img>
</a>
</td>
<td style="border-collapse: collapse; border: none; vertical-align: center;">
<b><font size = "5">L2 nFAPI Simulator (no S1 Mode / 2-host deployment)</font></b>
</td>
</tr>
</table>
## Table of Contents ##
1. [Environment](#1-environment)
2. [Retrieve the OAI eNB-UE source code](#2-retrieve-the-oai-enb-ue-source-code)
3. [Setup of the USIM information in UE folder](#3-setup-of-the-usim-information-in-ue-folder)
4. [Setup of the Configuration files](#4-setup-of-the-configuration-files)
1. [The eNB Configuration file](#41-the-enb-configuration-file)
2. [The UE Configuration file](#42-the-ue-configuration-file)
5. [Build OAI UE and eNodeB](#5-build-oai-ue-and-enodeb)
6. [Start the eNB](#6-start-the-enb)
7. [Start the UE](#7-start-the-ue)
8. [Test with ping](#8-test-with-ping)
9. [Limitations](#9-limitations)
# 1. Environment #
You may not have access to an EPC or you don't want to hassle to deploy one.
2 servers are used in this deployment. You can use Virtual Machines instead of each server; like it is done in the CI process.
* Machine B contains the OAI eNB executable (`lte-softmodem`)
* Machine C contains the OAI UE(s) executable (`lte-uesoftmodem`)
Example of L2 nFAPI Simulator testing environment:
<img src="./images/L2-sim-noS1-2-host-deployment.png" alt="" border=3>
Note that the IP addresses are indicative and need to be adapted to your environment.
# 2. Retrieve the OAI eNB-UE source code #
At the time of writing, the tag used in the `develop` branch to do this documentation was `2020.w16`.
The tutorial should be valid for the `master` branch tags such as `v1.2.0` or `v1.2.1`. But you may face issues that could be fixed in newer `develop` tags.
Please try to use the same commit ID on both eNB/UE hosts.
```bash
$ ssh sudousername@machineB
git clone https://gitlab.eurecom.fr/oai/openairinterface5g.git enb_folder
cd enb_folder
git checkout develop
```
```bash
$ ssh sudousername@machineC
git clone https://gitlab.eurecom.fr/oai/openairinterface5g.git ue_folder
cd ue_folder
git checkout develop
```
# 3. Setup of the USIM information in UE folder #
```bash
$ ssh sudousername@machineC
cd ue_folder
# Edit openair3/NAS/TOOLS/ue_eurecom_test_sfr.conf with your preferred editor
```
Edit the USIM information within this file in order to match the HSS database. They **HAVE TO** match:
* PLMN+MSIN and IMSI of users table of HSS database **SHALL** be the same.
* OPC of this file and OPC of users table of HSS database **SHALL** be the same.
* USIM_API_K of this file and the key of users table of HSS database **SHALL** be the same.
When testing multiple UEs, it is necessary to add other UEs information like described below for 2 Users. Only UE0 (first UE) information is written in the original file.
```
UE0:
{
USER: {
IMEI="356113022094149";
MANUFACTURER="EURECOM";
MODEL="LTE Android PC";
PIN="0000";
};
SIM: {
MSIN="0000000001"; // <-- Modify here
USIM_API_K="8baf473f2f8fd09487cccbd7097c6862";
OPC="e734f8734007d6c5ce7a0508809e7e9c";
MSISDN="33611123456";
};
...
};
// Copy the UE0 and edit
UE1: // <- Edit here
{
USER: {
IMEI="356113022094149";
MANUFACTURER="EURECOM";
MODEL="LTE Android PC";
PIN="0000";
};
SIM: {
MSIN="0000000002"; // <-- Modify here
USIM_API_K="8baf473f2f8fd09487cccbd7097c6862";
OPC="e734f8734007d6c5ce7a0508809e7e9c";
MSISDN="33611123456";
};
...
};
```
You can repeat the operation for as many users you want to test with.
# 4. Setup of the Configuration files #
**CAUTION: both proposed configuration files resides in the ci-scripts realm. You can copy them but you CANNOT push any modification on these 2 files as part of an MR without informing the CI team.**
## 4.1. The eNB Configuration file ##
```bash
$ ssh sudousername@machineB
cd enb_folder
# Edit ci-scripts/conf_files/rcc.band7.tm1.nfapi.conf with your preferred editor
```
First verify the nFAPI interface setup on the physical ethernet interface of machineB and put the proper IP addresses for both hosts.
```
MACRLCs = (
{
num_cc = 1;
local_s_if_name = "ens3"; // <-- HERE
remote_s_address = "192.168.122.169"; // <-- HERE
local_s_address = "192.168.122.31"; // <-- HERE
local_s_portc = 50001;
remote_s_portc = 50000;
local_s_portd = 50011;
remote_s_portd = 50010;
tr_s_preference = "nfapi";
tr_n_preference = "local_RRC";
}
);
```
If you are testing more than 16 UEs, a proper setting on the RUs is necessary. **Note that this part is NOT present in the original configuration file**.
```
RUs = (
{
local_rf = "yes"
nb_tx = 1
nb_rx = 1
att_tx = 20
att_rx = 0;
bands = [38];
max_pdschReferenceSignalPower = -23;
max_rxgain = 116;
eNB_instances = [0];
}
);
```
Last, the S1 interface shall be properly set.
```
////////// MME parameters:
mme_ip_address = ( { ipv4 = "CI_MME_IP_ADDR"; // replace with 192.168.122.195
ipv6 = "192:168:30::17";
active = "yes";
preference = "ipv4";
}
);
NETWORK_INTERFACES :
{
ENB_INTERFACE_NAME_FOR_S1_MME = "ens3"; // replace with the proper interface name
ENB_IPV4_ADDRESS_FOR_S1_MME = "CI_ENB_IP_ADDR"; // replace with 192.168.122.31
ENB_INTERFACE_NAME_FOR_S1U = "ens3"; // replace with the proper interface name
ENB_IPV4_ADDRESS_FOR_S1U = "CI_ENB_IP_ADDR"; // replace with 192.168.122.31
ENB_PORT_FOR_S1U = 2152; # Spec 2152
ENB_IPV4_ADDRESS_FOR_X2C = "CI_ENB_IP_ADDR"; // replace with 192.168.122.31
ENB_PORT_FOR_X2C = 36422; # Spec 36422
};
```
## 4.2. The UE Configuration file ##
```bash
$ ssh sudousername@machineB
cd ue_folder
# Edit ci-scripts/conf_files/ue.nfapi.conf with your preferred editor
```
Verify the nFAPI interface setup on the loopback interface.
```
L1s = (
{
num_cc = 1;
tr_n_preference = "nfapi";
local_n_if_name = "ens3"; // <- HERE
remote_n_address = "192.168.122.31"; // <- HERE
local_n_address = "192.168.122.169"; // <- HERE
local_n_portc = 50000;
remote_n_portc = 50001;
local_n_portd = 50010;
remote_n_portd = 50011;
}
);
```
# 5. Build OAI UE and eNodeB #
See [Build documentation](./BUILD.md).
# 6. Start the eNB #
In the first terminal (the one you used to build the eNB):
```bash
$ ssh sudousername@machineB
cd enb_folder/cmake_targets
sudo -E ./ran_build/build/lte-softmodem -O ../ci-scripts/conf_files/rcc.band7.tm1.nfapi.conf --noS1 > enb.log 2>&1
sleep 10
ifconfig
ens3 Link encap:Ethernet HWaddr XX:XX:XX:XX:XX:XX
inet addr:192.168.122.31 Bcast:192.168.122.255 Mask:255.255.255.0
....
oaitun_enb1 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.0.1.1 P-t-P:192.172.0.2 Mask:255.255.255.0
....
```
If you don't use redirection, you can test but many logs are printed on the console and this may affect performance of the L2-nFAPI simulator.
We do recommend the redirection in steady mode once your setup is correct.
# 7. Start the UE #
In the second terminal (the one you used to build the UE):
```bash
$ ssh sudousername@machineC
cd ue_folder/cmake_targets
# Test 64 UEs, 1 thread in FDD mode
sudo -E ./ran_build/build/lte-uesoftmodem -O ../ci-scripts/conf_files/ue.nfapi.conf --noS1 --L2-emul 3 --num-ues 64 --nums_ue_thread 1 --nokrnmod 1 > ue.log 2>&1
# Test 64 UEs, 1 thread in TDD mode
sudo -E ./ran_build/build/lte-uesoftmodem -O ../ci-scripts/conf_files/ue.nfapi.conf --noS1 --L2-emul 3 --num-ues 64 --nums_ue_thread 1 --nokrnmod 1 -T 1 > ue.log 2>&1
# The "-T 1" option means TDD config
```
- The number of UEs can set by using `--num-ues` option and the maximum UE number is 255 (with the `--mu*` options, otherwise 16).
- The number of threads can set with the `--nums-ue-thread`. This number **SHALL NOT** be greater than the number of UEs.
* At the time of writing, it seems to be enough to run on a single thread.
- The `--nokrnmod 1` option makes use of the preferred and supported tunnel interface.
- How many UE that can be tested depends on hardware (server , PC, etc) performance in your environment.
For example, running with 4 UEs:
```bash
$ ssh sudousername@machineC
cd ue_folder/cmake_targets
sudo -E ./ran_build/build/lte-uesoftmodem -O ../ci-scripts/conf_files/ue.nfapi.conf --noS1 --L2-emul 3 --num-ues 64 --nums_ue_thread 1 --nokrnmod 1 > ue.log 2>&1
sleep 10
ifconfig
ens3 Link encap:Ethernet HWaddr XX:XX:XX:XX:XX:XX
inet addr:192.168.122.169 Bcast:192.168.122.255 Mask:255.255.255.0
....
oaitun_ue1 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.0.1.2 P-t-P:192.172.0.2 Mask:255.255.255.0
....
oaitun_ue2 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.0.1.3 P-t-P:192.172.0.3 Mask:255.255.255.0
....
oaitun_ue3 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.0.1.4 P-t-P:192.172.0.4 Mask:255.255.255.0
....
oaitun_ue4 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.0.1.5 P-t-P:192.172.0.5 Mask:255.255.255.0
....
oaitun_uem1 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.0.2.2 P-t-P:10.0.2.2 Mask:255.255.255.0
....
....
```
Having the 4 oaitun_ue tunnel interfaces up and with an allocated address means the connection with EPC went alright.
# 8. Test with ping #
In a third terminal, after around 10 seconds, the UE(s) shall be connected to the eNB: Check with ifconfig
```bash
$ ssh sudousername@machineB
# Ping UE1 IP address based on the EPC pool used: in this example:
ping -I oaitun_enb1 -c 20 10.0.1.2
# Ping UE4 IP address based on the EPC pool used: in this example:
ping -I oaitun_enb1 -c 20 10.0.1.5
```
Ping from the UE side:
```bash
$ ssh sudousername@machineC
ping -I oaitun_ue1 -c 20 10.0.1.1
ping -I oaitun_ue3 -c 20 10.0.1.1
```
iperf operations can also be performed.
DL traffic:
```bash
$ ssh sudousername@machineC
iperf -B 10.0.1.2 -u -s -i 1 -fm -p 5002
$ ssh sudousername@machineB
iperf -c 10.0.1.2 -u -t 30 -b 3M -i 1 -fm -B 10.0.1.1 -p 5002
```
UL traffic:
```bash
$ ssh sudousername@machineB
iperf -B 10.0.1.1 -u -s -i 1 -fm -p 5002
$ ssh sudousername@machineC
iperf -c 10.0.1.1 -u -t 30 -b 2M -i 1 -fm -B 10.0.1.2 -p 5002
```
# 9. Limitations #
----
[oai wiki home](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/home)
[oai softmodem features](FEATURE_SET.md)
[oai softmodem build procedure](BUILD.md)
[L2 nfapi simulator](L2NFAPI.md)

167
doc/L2NFAPI_S1.md
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@@ -7,7 +7,7 @@
</a>
</td>
<td style="border-collapse: collapse; border: none; vertical-align: center;">
<b><font size = "5">L2 nFAPI Simulator (with S1 / same machine deployment)</font></b>
<b><font size = "5">L2 nFAPI Simulator (with S1 / 2-host deployment)</font></b>
</td>
</tr>
</table>
@@ -21,25 +21,24 @@
5. [Setup of the Configuration files](#5-setup-of-the-configuration-files)
1. [The eNB Configuration file](#51-the-enb-configuration-file)
2. [The UE Configuration file](#52-the-ue-configuration-file)
6. [Bring Up a second loopback interface](#6-bring-up-a-second-loopback-interface)
7. [Build the eNB](#7-build-the-enb)
8. [Build the UE](#8-build-the-ue)
9. [Initialize the NAS UE Layer](#9-initialize-the-nas-ue-layer)
10. [Start the eNB](#10-start-the-enb)
11. [Start the UE](#11-start-the-ue)
12. [Test with ping](#12-test-with-ping)
13. [Limitations](#13-limitations)
6. [Build OAI UE and eNodeB](#6-build-oai-ue-and-enodeb)
7. [Start EPC](#7-start-epc)
8. [Start the eNB](#8-start-the-enb)
9. [Start the UE](#9-start-the-ue)
10. [Test with ping](#10-test-with-ping)
11. [Limitations](#11-limitations)
# 1. Environment #
2 servers are used in this deployment. You can use Virtual Machines instead of each server; like it is done in the CI process.
3 servers are used in this deployment. You can use Virtual Machines instead of each server; like it is done in the CI process.
* Machine A contains the EPC.
* Machine B contains the OAI eNB and the OAI UE(s)
* Machine B contains the OAI eNB executable (`lte-softmodem`)
* Machine C contains the OAI UE(s) executable (`lte-uesoftmodem`)
Example of L2 nFAPI Simulator testing environment:
<img src="../l2-nfapi-simulator/L2-sim-single-server-deployment.png" alt="" border=3>
<img src="./images/L2-sim-S1-3-host-deployment.png" alt="" border=3>
Note that the IP addresses are indicative and need to be adapted to your environment.
@@ -47,26 +46,35 @@ Note that the IP addresses are indicative and need to be adapted to your environ
Create the environment for the EPC and register all **USIM** information into the **HSS** database.
If you are using OAI-EPC ([see on GitHub](https://github.com/OPENAIRINTERFACE/openair-cn)), build **HSS/MME/SPGW** and create config files.
If you are using OAI-EPC ([see on GitHub](https://github.com/OPENAIRINTERFACE/openair-epc-fed)), build **HSS/MME/SPGW** and create config files.
# 3. Retrieve the OAI eNB-UE source code #
The eNB and the UE executables will compiled into 2 separate folders on the same machine `B`.
At the time of writing, the tag used in the `develop` branch to do this documentation was `2020.w16`.
The tutorial should be valid for the `master` branch tags such as `v1.2.0` or `v1.2.1`. But you may face issues that could be fixed in newer `develop` tags.
Please try to use the same commit ID on both eNB/UE hosts.
```bash
$ ssh sudousername@machineB
$ git clone https://gitlab.eurecom.fr/oai/openairinterface5g/ enb_folder
$ cd enb_folder
$ git checkout -f v1.0.0
$ cd ..
$ cp -Rf enb_folder ue_folder
git clone https://gitlab.eurecom.fr/oai/openairinterface5g.git enb_folder
cd enb_folder
git checkout develop
```
```bash
$ ssh sudousername@machineC
git clone https://gitlab.eurecom.fr/oai/openairinterface5g.git ue_folder
cd ue_folder
git checkout develop
```
# 4. Setup of the USIM information in UE folder #
```bash
$ ssh sudousername@machineB
$ cd ue_folder
$ ssh sudousername@machineC
cd ue_folder
# Edit openair3/NAS/TOOLS/ue_eurecom_test_sfr.conf with your preferred editor
```
@@ -126,19 +134,19 @@ You can repeat the operation for as many users you want to test with.
```bash
$ ssh sudousername@machineB
$ cd enb_folder
cd enb_folder
# Edit ci-scripts/conf_files/rcc.band7.tm1.nfapi.conf with your preferred editor
```
First verify the nFAPI interface setup on the 2nd loopback interface.
First verify the nFAPI interface setup on the physical ethernet interface of machineB and put the proper IP addresses for both hosts.
```
MACRLCs = (
{
num_cc = 1;
local_s_if_name = "lo:"; // <-- HERE
remote_s_address = "127.0.0.1"; // <-- HERE
local_s_address = "127.0.0.2"; // <-- HERE
local_s_if_name = "ens3"; // <-- HERE
remote_s_address = "192.168.122.169"; // <-- HERE
local_s_address = "192.168.122.31"; // <-- HERE
local_s_portc = 50001;
remote_s_portc = 50000;
local_s_portd = 50011;
@@ -171,7 +179,7 @@ Last, the S1 interface shall be properly set.
```
////////// MME parameters:
mme_ip_address = ( { ipv4 = "CI_MME_IP_ADDR"; // replace with 192.168.10.20
mme_ip_address = ( { ipv4 = "CI_MME_IP_ADDR"; // replace with 192.168.122.195
ipv6 = "192:168:30::17";
active = "yes";
preference = "ipv4";
@@ -181,11 +189,11 @@ Last, the S1 interface shall be properly set.
NETWORK_INTERFACES :
{
ENB_INTERFACE_NAME_FOR_S1_MME = "ens3"; // replace with the proper interface name
ENB_IPV4_ADDRESS_FOR_S1_MME = "CI_ENB_IP_ADDR"; // replace with 192.168.10.10
ENB_IPV4_ADDRESS_FOR_S1_MME = "CI_ENB_IP_ADDR"; // replace with 192.168.122.31
ENB_INTERFACE_NAME_FOR_S1U = "ens3"; // replace with the proper interface name
ENB_IPV4_ADDRESS_FOR_S1U = "CI_ENB_IP_ADDR"; // replace with 192.168.10.10
ENB_IPV4_ADDRESS_FOR_S1U = "CI_ENB_IP_ADDR"; // replace with 192.168.122.31
ENB_PORT_FOR_S1U = 2152; # Spec 2152
ENB_IPV4_ADDRESS_FOR_X2C = "CI_ENB_IP_ADDR"; // replace with 192.168.10.10
ENB_IPV4_ADDRESS_FOR_X2C = "CI_ENB_IP_ADDR"; // replace with 192.168.122.31
ENB_PORT_FOR_X2C = 36422; # Spec 36422
};
@@ -195,7 +203,7 @@ Last, the S1 interface shall be properly set.
```bash
$ ssh sudousername@machineB
$ cd ue_folder
cd ue_folder
# Edit ci-scripts/conf_files/ue.nfapi.conf with your preferred editor
```
@@ -206,9 +214,9 @@ L1s = (
{
num_cc = 1;
tr_n_preference = "nfapi";
local_n_if_name = "lo"; // <- HERE
remote_n_address = "127.0.0.2"; // <- HERE
local_n_address = "127.0.0.1"; // <- HERE
local_n_if_name = "ens3"; // <- HERE
remote_n_address = "192.168.122.31"; // <- HERE
local_n_address = "192.168.122.169"; // <- HERE
local_n_portc = 50000;
remote_n_portc = 50001;
local_n_portd = 50010;
@@ -217,20 +225,11 @@ L1s = (
);
```
# 6. Bring Up a second loopback interface #
# 6. Build OAI UE and eNodeB #
A second loopback interface is used to connect the eNB and the UEs.
See [Build documentation](./BUILD.md).
```bash
$ ssh sudousername@machineB
$ sudo ifconfig lo: 127.0.0.2 netmask 255.0.0.0 up
```
# 7. [Build OAI UE and eNodeB](BUILD.md) #
# 8. Initialize the NAS UE Layer #
# 7. Start EPC #
Start the EPC on machine `A`.
@@ -239,61 +238,89 @@ $ ssh sudousername@machineA
# Start the EPC
```
# 9. Start the eNB #
# 8. Start the eNB #
In the first terminal (the one you used to build the eNB):
```bash
$ ssh sudousername@machineB
$ cd enb_folder/cmake_targets
$ sudo -E ./ran_build/build/lte-softmodem -O ../ci-scripts/conf_files/rcc.band7.tm1.nfapi.conf > enb.log 2>&1
cd enb_folder/cmake_targets
sudo -E ./ran_build/build/lte-softmodem -O ../ci-scripts/conf_files/rcc.band7.tm1.nfapi.conf > enb.log 2>&1
```
If you don't use redirection, you can test but many logs are printed on the console and this may affect performance of the L2-nFAPI simulator.
We do recommend the redirection in steady mode once your setup is correct.
# 10. Start the UE #
# 9. Start the UE #
In the second terminal (the one you used to build the UE):
```bash
$ ssh sudousername@machineB
$ cd ue_folder/cmake_targets
# Test 64 UEs, 64 threads in FDD mode
$ sudo -E ./ran_build/build/lte-uesoftmodem -O ../ci-scripts/conf_files/ue.nfapi.conf --L2-emul 3 --num-ues 64 --nums-ue-thread 64 > ue.log 2>&1
# Test 64 UEs, 64 threads in TDD mode
$ sudo -E ./ran_build/build/lte-uesoftmodem -O ../ci-scripts/conf_files/ue.nfapi.conf --L2-emul 3 --num-ues 64 --nums-ue-thread 64 -T 1 > ue.log 2>&1
$ ssh sudousername@machineC
cd ue_folder/cmake_targets
# Test 64 UEs, 1 thread in FDD mode
sudo -E ./ran_build/build/lte-uesoftmodem -O ../ci-scripts/conf_files/ue.nfapi.conf --L2-emul 3 --num-ues 64 --nums_ue_thread 1 --nokrnmod 1 > ue.log 2>&1
# Test 64 UEs, 1 thread in TDD mode
sudo -E ./ran_build/build/lte-uesoftmodem -O ../ci-scripts/conf_files/ue.nfapi.conf --L2-emul 3 --num-ues 64 --nums_ue_thread 1 --nokrnmod 1 -T 1 > ue.log 2>&1
# The "-T 1" option means TDD config
```
- The number of UEs can set by using `--num-ues` option and the maximum UE number is 255 (with the `--mu*` options, otherwise 16).
- The umber of threads can set with the `--nums-ue-thread`. This number **SHALL NOT** be greater than the number of UEs.
- The number of threads can set with the `--nums-ue-thread`. This number **SHALL NOT** be greater than the number of UEs.
* At the time of writing, it seems to be enough to run on a single thread.
- The `--nokrnmod 1` option makes use of the preferred and supported tunnel interface.
- How many UE that can be tested depends on hardware (server , PC, etc) performance in your environment.
# 11. Test with ping #
For example, running with 4 UEs:
In a third terminal, after around 10 seconds, the UE(s) shall be connected to the eNB:
```bash
$ ssh sudousername@machineC
cd ue_folder/cmake_targets
sudo -E ./ran_build/build/lte-uesoftmodem -O ../ci-scripts/conf_files/ue.nfapi.conf --L2-emul 3 --num-ues 64 --nums_ue_thread 1 --nokrnmod 1 > ue.log 2>&1
sleep 10
ifconfig
ens3 Link encap:Ethernet HWaddr XX:XX:XX:XX:XX:XX
inet addr:192.168.122.169 Bcast:192.168.122.255 Mask:255.255.255.0
....
oaitun_ue1 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:192.172.0.2 P-t-P:192.172.0.2 Mask:255.255.255.0
....
oaitun_ue2 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:192.172.0.3 P-t-P:192.172.0.3 Mask:255.255.255.0
....
oaitun_ue3 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:192.172.0.4 P-t-P:192.172.0.4 Mask:255.255.255.0
....
oaitun_ue4 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:192.172.0.5 P-t-P:192.172.0.5 Mask:255.255.255.0
....
oaitun_uem1 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.0.2.2 P-t-P:10.0.2.2 Mask:255.255.255.0
....
....
```
Having the 4 oaitun_ue tunnel interfaces up and with an allocated address means the connection with EPC went alright.
# 10. Test with ping #
In a third terminal, after around 10 seconds, the UE(s) shall be connected to the eNB: Check with ifconfig
```bash
$ ssh sudousername@machineA
# Ping UE0 IP address based on the EPC pool used: in this example:
$ ping -c 20 192.168.200.2
# Ping UE1 IP address based on the EPC pool used: in this example:
$ ping -c 20 192.168.200.4
$ ping -c 20 192.172.0.2
# Ping UE4 IP address based on the EPC pool used: in this example:
$ ping -c 20 192.172.0.5
```
# 12. Limitations #
Testing on the CI process is currently limited at time of writing. Improvements will be made soon.
iperf operations can also be performed.
# 11. Limitations #
----
[oai wiki home](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/home)

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