Update README.md

openairinterface5g/openairinterface-install-scripts/README.md

@@ -191,7 +191,7 @@ In a Linux Terminal, follow the steps below:
 
 The Public Land Mobile Network (PLMN) and Tracking Area Code (TAC) will be configured in the gNB (/home/dco1020/openairinterface5g/targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.fr1.106PRB.usrpb210.conf) configuration file. 
 
-Figure below shows the part of the code that must be modified in the CU and DU files (lines 17 and 18). The parameters shown in figure should be modified according to the values present in docker compose in the "oai-amf" session (/home/dco1020/oai-cn5g-fed/docker-compose/docker-compose-basic-nrf.yaml). 
+Figure below shows the part of the code that must be modified in the CU and DU files (lines 17 and 18). The parameters shown in figure should be modified according to the values present in docker compose in the "oai-amf" session (/home/dco1020/oai-cn5g-fed/docker-compose/docker-compose-slicing-basic-nrf.yaml). 
 
 ![ALT](/openairinterface5g/openairinterface-conf/fig/gNB_config_01.png)  
 
@@ -205,6 +205,30 @@ gedit /home/dco1020/openairinterface5g/targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.
 
 gedit /home/dco1020/oai-cn5g-fed/docker-compose/conf/slicing_base_config.yaml
 
+**Step 2:**  Configure the network interfaces
+
+This part you will configure the N2 interface in (/home/dco1020/openairinterface5g/targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.fr1.106PRB.usrpb210.conf), such as in figure below. This interface is responsible to connect the gNB and the AMF.
+
+![gNB_config_03](../FIGS/H02_5GRAN_UNI_III/gNB_config_03.png)
+
+You need to verify/change the IP addresses. You can find the OAI-AMF IP address inside /home/dco1020/oai-cn5g-fed/docker-compose/docker-compose-slicing-basic-nrf.yaml, such as in figure below. You must get this IP address and put it in the "amf_ip_address" parameter, in the "ipv4" field (such as in previous figure).
+
+![ALT](/openairinterface5g/openairinterface-conf/fig/amf_parameters.png)  
+
+
+Check if the IP Address of cu_gnb.conf is the same of docker-compose-basic-nrf.yaml. To edit cu_gnb.conf, type:
+
+gedit /home/dco1020/openairinterface5g/targets/PROJECTS/GENERIC-NR-5GC/CONF/cu_gnb.conf
+
+
+**Step 3:** to check a virtual interface (demo-oai), type:
+
+ifconfig -a
+
+You should find a virtual interface (demo-oai) (as shown in figure below). This interface serves to connect the CU with OAI-AMF.  You must get its IP address and name to configure the N2 interface such as two figures before. 
+
+![gNB_config_05](../FIGS/H02_5GRAN_UNI_III/gNB_config_05.png)
+
 ## UE 1 Configurations
 
 ## Objectives