@startuml
'!theme plain
' Styling for Transparency and Layout
skinparam backgroundColor transparent
skinparam DefaultFontName Helvetica
skinparam componentStyle rectangle
skinparam shadowing false
title Resilient Dual-WAN Topology\n(Fiber + 5G Failover)
cloud "Fiber ISP" as ISP
cloud "Mobile ISP\n(4G / 5G)" as Mobile
node "TP-Link AX73\nBridge / DMZ Mode\nMgmt: 192.168.100.1/24" as AX73
node "DWR-BE7200G\nMain Router\nLAN: 10.19.80.1/22\nWAN1: Fiber\nWAN2: 5G Failover" as DWR
node "Pi-hole\nDHCP + DNS\nIP: 10.19.80.53/22\nGW: 10.19.80.1" as PI
node "Switch / LAN Segment\nSubnet: 10.19.80.0/22" as SW
node "Clients Group A\n<b>Subnet :</b> 10.19.80.1/24\n<b>Gateway:</b> 10.19.80.1" as CA
node "Clients Group B\n<b>Subnet :</b> 10.19.81.1/24\n<b>Gateway:</b> 10.19.80.1" as CB
node "Clients Group C\n<b>Subnet :</b> 10.19.82.1/24\n<b>Gateway:</b> 10.19.80.1" as CC
node "Clients Group D\n<b>Subnet :</b> 10.19.83.1/24\n<b>Gateway:</b> 10.19.80.1" as CD
ISP --> AX73 : Fiber
AX73 --> DWR : Ethernet WAN1
Mobile --> DWR : 5G WAN2 (Backup)
DWR --> SW : LAN
CA --> PI
SW --> CA
SW --> CB
SW --> CC
SW --> CD
note right of DWR
<b>Primary Route:</b> Fiber → AX73 → ISP
<b>Failover Route:</b> 5G → Mobile ISP
<b>Health Check:</b> Ping 1.1.1.1
Auto-switch on failure
end note
note right of PI
<b>DHCP Range:</b> 10.19.81.1 - 10.19.83.254
<b>Gateway:</b> 10.19.80.1
<b>DNS:</b> 10.19.80.53
end note
@enduml
