ARP reply problem

[paintspot87]

Hi, I have small network with where I have disabled hasGlobalArp because otherwise my static forwardingTable in the switch gets overwritten.

I don't mind if there are arp requests but when I have an EthernetSinkApp the arp requests are forwarded to that one instead of via ipv4 towards the TcpSinkApp and no reply is sent. If I disable the EthernetSinkApp the arp request and reply is successful.

Is there any way I get configure the ARP table statically in my nodes or can it be solved in some other way?

The behavior of the arp reply can be observed in IDE_B

NED file:

import inet.networks.base.TsnNetworkBase;
import inet.node.tsn.TsnSwitch;
import inet.node.tsn.TsnDevice;
import inet.node.tsn.TsnClock;
import inet.node.inet.StandardHost;
import inet.node.ethernet.Eth100M;

network MultiCast extends TsnNetworkBase
{
    submodules:
        IDE_A: StandardHost {
            parameters:
                @display("p=298,77");
        }
        IDE_B: StandardHost {
            parameters:
                @display("p=391,77");
        }
        IDE_C: StandardHost {
            parameters:
                @display("p=501,77");
        }
        MU: StandardHost {
            parameters:
                @display("p=391,272");
        }
        switch: TsnSwitch {
            parameters:
                @display("p=391,169");
        }
    connections:
        IDE_A.ethg++ <--> Eth100M <--> switch.ethg++;
        IDE_B.ethg++ <--> Eth100M <--> switch.ethg++;
        IDE_C.ethg++ <--> Eth100M <--> switch.ethg++;
        MU.ethg++ <--> Eth100M <--> switch.ethg++;
}

INI-file:

[Config MultiCast]
**.hasGlobalArp = false

**.IDE_A.numApps = 2
**.IDE_A.app[0].typename = "EthernetSinkApp"
**.IDE_A.app[0].display-name = "SV Sink #1"
**.IDE_A.app[0].io.localAddress = "01:0C:CD:04:00:20"
**.IDE_A.app[0].io.interface = "eth0"

#IDE_A MMS TO IDE_B
**.IDE_A.app[1].typename = "TcpClientApp"
**.IDE_A.app[1].source.packetLength = 84B # Packet size is 150 B
**.IDE_A.app[1].source.productionInterval = 1s/10
**.IDE_A.app[1].source.packetNameFormat = "%M->MMS-%c"
**.IDE_A.app[1].io.connectAddress = "10.0.0.2"
**.IDE_A.app[1].io.connectPort = 1112

**.IDE_B.numApps = 2

#IDE_B MMS SINK
**.IDE_B.app[0].typename = "TcpSinkApp"
**.IDE_B.app[0].display-name = "MMS Sink"
**.IDE_B.app[0].io.interface = "eth0"
#**.IDE_B.app[0].localAddress = "10.0.0.10"
**.IDE_B.app[0].localPort = 1112

**.IDE_B.app[1].typename = "EthernetSinkApp"
**.IDE_B.app[1].display-name = "SV Sink #1"
**.IDE_B.app[1].io.localAddress = "01:0C:CD:04:00:20"
**.IDE_B.app[1].io.interface = "eth0"

**.IDE_C.numApps = 1
**.IDE_C.app[0].typename = "EthernetSinkApp"
**.IDE_C.app[0].display-name = "SV Sink #1"
**.IDE_C.app[0].io.localAddress = "01:0C:CD:04:00:30"
**.IDE_C.app[0].io.interface = "eth0"

**.MU.numApps = 1
**.MU.app[0].typename = "EthernetSourceApp"
**.MU.app[0].display-name = "SV Source #1"
**.MU.app[0].source.packetLength = 84B
**.MU.app[0].source.productionInterval = 1.0s/40
**.MU.app[0].source.packetNameFormat = "%M-SV, Packet: %c, Event: %e"
**.MU.app[0].io.remoteAddress = "01:0C:CD:04:00:20"
**.MU.app[0].io.interface = "eth0"

# GOOSE Type 1/1A 	= 01-0C-CD-01-00-00 through 01-0C-CD-01-01-FF 
# SV 				= 01-0C-CD-04-00-00 through 01-0C-CD-04-01-FF 

**.switch.macTable.forwardingTable = [{address: "IDE_A", interface: "eth0"}, \
										{address: "IDE_B", interface: "eth1"}, \
										{address: "IDE_C", interface: "eth2"}, \
										{address: "MU", interface: "eth3"}, \
									  	{address: "01:0C:CD:04:00:20", interface: "eth1"}, \
                                      	{address: "01:0C:CD:04:00:20", interface: "eth2"}, \
									  	{address: "01:0C:CD:04:00:30", interface: "eth3"}, \
										{address: "00:00:00:00:00:10", interface: "eth1"},]

[levy]

The hasGlobalArp parameter also puts the MacForwardingTableConfigurator into the network. You can override this.

        macForwardingTableConfigurator: <default(hasGlobalArp ? "MacForwardingTableConfigurator" : "")> like INetworkConfigurator if typename != "" {

You are right that there should be a separate module that contains the resolved addresses. Both GlobalArp and Arp should insert the mapping there, and the user should also be able to populate this table manually. I think this is fairly easy to do, so we may do this soonish.

[paintspot87]

Thank you! I was there and looked also but I didn't make the connection.

Now it functions as I want it. :)