Configuring different 5G networks addresses

[Abdullahalshra3a]

I am using the OpenFlow package and Simu5G 1.3.0 to simulate a complex network managed by an OpenFlow controller.
When I simulated the following simple network, it worked well:

This is the XML file for the first picture:

 <config> 

<!-- control plane --> 
<interface hosts='**.open_flow_controller*' names='eth0' address='10.x.x.x' netmask='255.x.x.x'/>
<interface hosts="**.open_flow_switch*" names="eth0" address="10.x.x.x" netmask="255.x.x.x"/><!-- control plane -->

<!-- data plane --> 
<interface hosts="**.client*"  address='192.168.x.x' netmask='255.255.x.x'/>
<interface hosts="**.server*"  address='192.168.x.x' netmask='255.255.x.x'/>

<interface among="upf1 gnb1 ue1 router"  address="192.168.1.x"/><!-- data plane -->
<interface hosts="**.router*" address='192.168.x.x' netmask='255.255.x.x'/>

<route hosts="*.router*" interface="eth0" destination="*"/>
<route hosts="*.client*" interface="eth0" destination="*"/>
<route hosts="*.server*" interface="eth0" destination="*"/>
</config>

But I got different errors when I tried to extend the network, where my goal is to have OpenFlow switches connecting different 5G mobile nodes, as shown in the following picture.

Although I tried for a long time but I couldn't find the correct way to configure the node addresses, and I always get errors.

This is the last XML file I use, but no connection between the 5G nodes and the S nodes (Servers)

<config> 
    <!-- control plane --> 
    <interface hosts='**.open_flow_controller*' names='eth0' address='10.x.x.x' netmask='255.x.x.x'/>
    <interface hosts="**.R*" names="eth0" address="10.x.x.x" netmask="255.x.x.x"/><!-- control plane -->
    
    <!-- Data plane configuration - Different subnets for each router -->
    
    <!-- Flow 1: router1 → UPF1 → gNB1 (for F26) -->    
    <interface among="upf1 gnb1 F26 router1"  address="192.161.x.x"/><!-- data plane -->
    <interface hosts="**.router1" address='192.168.x.x' netmask='255.255.x.x'/>
    
    <!-- Flow 2: router2 → UPF2 → gNB2 (for F23, F24, F25) -->
    <interface among="upf2 gnb2 F23 F24 F25 router2"  address="192.162.x.x"/><!-- data plane -->
    <interface hosts="**.router2" address='192.168.x.x' netmask='255.255.x.x'/>
    
    <!-- Flow 3: router3 → UPF3 → gNB3 (for F21, F22) -->
    <interface among="upf3 gnb3 F21 F22 router3"  address="192.163.x.x"/><!-- data plane -->
    <interface hosts="**.router3" address='192.168.x.x' netmask='255.255.x.x'/>
    
    <!-- Flow 4: router4 → UPF4 → gNB4 (for F15, F16) -->
    <interface among="upf4 gnb4 F15 F16 router4"  address="192.164.x.x"/><!-- data plane -->
    <interface hosts="**.router4" address='192.168.x.x' netmask='255.255.x.x'/>
    
    <!-- Flow 5: router5 → UPF5 → gNB5 (for F11) -->
    <interface among="upf5 gnb5 F11 router5"  address="192.165.x.x"/><!-- data plane -->
    <interface hosts="**.router5" address='192.168.x.x' netmask='255.255.x.x'/>
    
    <!-- Flow 6: router6 → UPF6 → gNB6 (for F12, F13, F14) -->
    <interface among="upf6 gnb6 F12 F13 F14 router6"  address="192.166.x.x"/><!-- data plane -->
    <interface hosts="**.router6" address='192.168.x.x' netmask='255.255.x.x'/>
    
    <!-- Flow 7: router7 → UPF7 → gNB7 (for F31, F32) -->
    <interface among="upf7 gnb7 F31 F32 router7"  address="192.167.x.x"/><!-- data plane -->
    <interface hosts="**.router7" address='192.168.x.x' netmask='255.255.x.x'/>
    
    <!-- Flow 8: router8 → UPF8 → gNB8 (for F33, F34, F35) -->
    <interface among="upf8 gnb8 F33 F34 F35 router8"  address="192.168.x.x"/><!-- data plane -->
    <interface hosts="**.router8" address='192.168.x.x' netmask='255.255.x.x'/>
    
    <!-- Standard hosts configuration -->
    <interface hosts="S1"  address='192.168.x.x' netmask='255.255.x.x'/>  <!-- Connected to R12 subnet -->
    <interface hosts="S2" address='192.168.x.x' netmask='255.255.x.x'/>  <!-- Connected to R21 subnet -->
    
    
    <!-- Routing configuration -->
    <route hosts="**.router*" interface="eth0" destination="*"/>
    <route hosts="**.S*" interface="eth0" destination="*"/>
    
</config>

I would like to provide the ini and ned files I am using, but it is not allowed here as an attachment. Moreover, I thought they well make the Question too long.

Could you please guide me on how to fix this issue?