feat: Adding ports table

Signed-off-by: gatici <gulsum.atici@canonical.com>

docs/.wordlist.txt

@@ -14,6 +14,7 @@ CSR
 gNB
 DN
 Gnbsim
+gNBSIM
 Grafana
 GRPC
 GTP
@@ -40,6 +41,7 @@ ONOS
 ONF's
 PCF
 PFCP
+RAN
 Rockcraft
 SBI
 SCTP

docs/reference/networking.md

@@ -16,20 +16,33 @@ UPF Interfaces/reference points with employed protocols:
 - K8s LoadBalancer (N4): Interface between the Session Management Function (SMF) and the UPF  
 
 
-UPF endpoints are given in the below table:
+A minimal 5G network setup is given in the figure below.
 
-| **UPF PORT NAME** | **PORT NUMBER**      | **PROTOCOL**  |
-|:------------------|:---------------------|:--------------|
-| PFCP              | 8805                 | UDP           |
-| BESSD             | 10514                | TCP           |
+```{image} ../images/5g_network_diagram.png
+:alt: 5G Network Diagram
+:height: 600
+:align: center
+```
+
+According to the sample 5G network setup, the ports given in the below tables need to be allowed in the firewalls to assure the connectivity between Control plane and User plane.
 
+Connectivity between Control plane and User plane:
 
+|             |      **SOURCE**       |    **DESTINATION**    | 
+|:-----------:|:---------------------:|:---------------------:|
+|     IP      |     10.201.0.200      |      10.201.0.11      | 
+|   MODULE    |          UPF          |          SMF          |
+|  PORT NAME  |         PFCP          |         PFCP          |
+| PORT NUMBER |         8805          |                       |
+|  PROTOCOL   |          UDP          |          UDP          |
+|  INTERFACE  | K8s LoadBalancer(N4)  | K8s LoadBalancer(N4)  |
 
-AMF endpoints are given in the below table:
+|             |      **SOURCE**      |   **DESTINATION**    |
+|:-----------:|:--------------------:|:--------------------:|
+|     IP      |     10.201.0.100     |     10.201.0.13      |
+|   MODULE    |         AMF          |     gNBSIM (RAN)     |
+|  PORT NAME  |        NGAPP         |        NGAPP         |
+| PORT NUMBER |        38412         |                      |
+|  PROTOCOL   |         SCTP         |         SCTP         |
+|  INTERFACE  | K8s LoadBalancer(N2) | K8s LoadBalancer(N2) |
 
-| **AMF PORT NAME** | **PORT NUMBER**     | **PROTOCOL** |
-|:------------------|:--------------------|:-------------|
-| NGAPP             | 38412               | SCTP         |
-| SBI               | 29518               | HTTPS        |
-| GRPC              | 9000                | TCP          |
-