EthernetHub

simple module

An Ethernet hub model.

The model simply broadcasts frames (and transmission updates representing aborted frames, etc.) received on one port on all other ports, mimicking the propagation of electrical signals.

Note that no special attention is made to appropriately model frame truncations that occur when the link breaks, or comes back up while a transmission is underway. If you need to precisely model what happens when the link state changes, you cannot use this module.

Used in compound modules

Name	Type	Description
IPv4LargeLAN	compound module	Several hosts and an Ethernet hub on a switch. One port of the hub connect to a 10Base2 segment.
IPv4MediumLAN	compound module	Several hosts and a router on an Ethernet hub and a switch
LargeLAN	compound module	Several hosts and an Ethernet hub on a switch. One port of the hub connect to a 10Base2 segment. Part of ~LargeNet(1,2).
MediumLAN	compound module	Several hosts and an Ethernet hub on a switch; part of ~LargeNet(1,2).
SmallLAN	compound module	Several hosts on an Ethernet hub; part of ~LargeNet(1,2).

Used in

Name	Type	Description
ARPTest	network	(no description)
HubLAN	network	Sample Ethernet LAN: four hosts connected by a hub.
MixedLAN	network	Sample Ethernet LAN containing eight hosts, a switch and a bus.

Properties

Name	Value	Description
networkNode
class	::inet::physicallayer::WireJunction
labels	node
display	i=device/hub;bgb=155,104

Gates

Name	Direction	Size	Description
ethg [ ]	inout

Signals

Name	Type	Unit
packetReceived	cMessage

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode
packetReceived	packets	packetReceived	count, sum(packetBytes), vector(packetBytes)		none

Source code

//
// An Ethernet hub model.
//
// The model simply broadcasts frames (and transmission updates
// representing aborted frames, etc.) received on one port on all
// other ports, mimicking the propagation of electrical signals.
//
// Note that no special attention is made to appropriately model
// frame truncations that occur when the link breaks, or comes
// back up while a transmission is underway. If you need
// to precisely model what happens when the link state changes,
// you cannot use this module.
//
simple EthernetHub
{
    parameters:
        @networkNode();
        @class(::inet::physicallayer::WireJunction);
        @labels(node,ethernet-node);
        @display("i=device/hub;bgb=155,104");
        @signal[packetReceived](type=cMessage);
        @statistic[packetReceived](title="packets"; source=packetReceived; record=count,"sum(packetBytes)","vector(packetBytes)"; interpolationmode=none);
    gates:
        inout ethg[] @labels(EtherFrame-conn);
}

File: src/inet/node/ethernet/EthernetHub.ned