Model of an Ethernet switch.

The duplexChannel attributes of the MACs must be set according to the medium connected to the port; if collisions are possible (it's a bus or hub) it must be set to false, otherwise it can be set to true. By default used half duples CSMA/CD mac

Usage diagram

The following diagram shows usage relationships between types. Unresolved types are missing from the diagram.

Parameters

Name	Type	Default value	Description
hasStatus	bool	false
csmacdSupport	bool	true	by default use CSMA/CD
macType	string	csmacdSupport ? "EtherMAC" : "EtherMACFullDuplex"	EtherMAC or EtherMACFullDuplex
spanningTreeProtocol	string	""
relayUnitType	string	firstAvailable("Ieee8021dRelay","MACRelayUnit")	type of the IMACRelayUnit;
macTableType	string	"MACAddressTable"	type of the IMACAddressTable

Properties

Name	Value	Description
networkNode
labels	node
display	i=device/switch

Gates

Name	Direction	Size	Description
ethg [ ]	inout

Unassigned submodule parameters

Name	Type	Default value	Description
status.initialStatus	string	"UP"	TODO @signal, @statistic
l2NodeConfigurator.interfaceTableModule	string
l2NodeConfigurator.l2ConfiguratorModule	string	"l2NetworkConfigurator"	the absolute path to the L2NetworkConfigurator; use "" if there is no configurator
interfaceTable.displayAddresses	bool	false	whether to display IP addresses on links
macTable.agingTime	double
macTable.addressTableFile	string
stp.helloTime	double
stp.forwardDelay	double
stp.maxAge	double
stp.bridgePriority	int
stp.visualize	bool

Source code

//
// Model of an Ethernet switch.
//
// The duplexChannel attributes of the MACs must be set according to the
// medium connected to the port; if collisions are possible (it's a bus or hub)
// it must be set to false, otherwise it can be set to true.
// By default used half duples CSMA/CD mac
//
//
module EtherSwitch
{
    parameters:
        @networkNode();
        @labels(node,ethernet-node);
        @display("i=device/switch");
        bool hasStatus = default(false);
        bool csmacdSupport = default(true);  // by default use CSMA/CD
        string macType = default(csmacdSupport ? "EtherMAC" : "EtherMACFullDuplex"); // ~EtherMAC or ~EtherMACFullDuplex
        string spanningTreeProtocol = default("");
        string relayUnitType = default(firstAvailable("Ieee8021dRelay","MACRelayUnit")); // type of the ~IMACRelayUnit;
        string macTableType = default("MACAddressTable"); // type of the ~IMACAddressTable
        eth[*].encapType = "EtherEncapDummy";
        eth[*].csmacdSupport = this.csmacdSupport;
        eth[*].macType = this.macType;
        *.interfaceTableModule = default(absPath(".interfaceTable"));
    gates:
        inout ethg[] @labels(EtherFrame-conn);
    submodules:
        status: NodeStatus if hasStatus {
            @display("p=73,111;is=s");
        }
        l2NodeConfigurator: L2NodeConfigurator if spanningTreeProtocol != "" {
            @display("p=73,208");
        }
        interfaceTable: InterfaceTable {
            @display("p=73,65;is=s");
        }
        macTable: <macTableType> like IMACAddressTable {
            @display("p=73,19;is=s");
        }
        relayUnit: <relayUnitType> like IMACRelayUnit {
            parameters:
                @display("p=263,50;is=m");
            gates:
                ifIn[sizeof(parent.ethg)];
                ifOut[sizeof(parent.ethg)];
        }
        stp: <spanningTreeProtocol> like ISpanningTree if spanningTreeProtocol != "" {
            @display("p=168,50");
        }
        eth[sizeof(ethg)]: <default("EthernetInterface")> like IWiredNic {
            parameters:
                mac.promiscuous = true;
                @display("p=263,150,row;q=txQueue");
        }
    connections:
        for i=0..sizeof(ethg)-1 {
            eth[i].upperLayerIn <-- relayUnit.ifOut++;
            eth[i].upperLayerOut --> relayUnit.ifIn++;
            eth[i].phys <--> ethg[i];
        }

        if spanningTreeProtocol != "" {
            stp.relayIn <-- relayUnit.stpOut;
            stp.relayOut --> relayUnit.stpIn;
        }
}

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

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