@startuml

' ===========================
' Abstract base class
' ===========================

abstract class Device {
    - name : String
    - mgmtIP : String
    - interfaces : Interface[*]
}

Device "1" o-- "0..*" Interface : has >

' ===========================
' Device Types
' ===========================

class Host {
    - operatingSystem : String
}

class Router {
    - routingTable : Map
    - routingProtocols : List
}

class Switch {
    - macTable : Map
    - vlanDatabase : Map
}

Device <|-- Host
Device <|-- Router
Device <|-- Switch

' ===========================
' Interfaces
' ===========================

class Interface {
    - name : String
    - ipAddress : String
    - macAddress : String
    - speed : String
    - duplex : String
}

class VirtualInterface {
    - vlanId : Integer
    - parentPhysical : Interface
}

Interface <|-- VirtualInterface

' ===========================
' Physical Links
' ===========================

class Wire {
    - type : String
    - endpoints : Interface[2]
    - bandwidth : String
}

Wire "1" -- "2" Interface : connects >

' ===========================
' Optional: Networks / Subnets
' ===========================

class Network {
    - cidr : String
    - gateway : String
}

Network "1" o-- "0..*" Interface : membership >

@enduml