Step 18. AS-External LSAs of ‘type 1 metric’ with different advertised destination¶
Goals¶
[explanation]
Configuration¶
This step uses the following network:
network OSPF_Area_External extends OSPF_AreaTest
{
@display("bgb=1151.665,517.31");
submodules:
N1: OspfLan {
parameters:
h = 1;
@display("p=539.45123,389.04126");
}
N2: OspfLan {
parameters:
h = 1;
@display("p=820.02374,389.04126");
}
connections:
R3.ethg++ <--> Eth100M <--> N1.ethg++;
R5.ethg++ <--> Eth100M <--> N2.ethg++;
}
The configuration in omnetpp.ini
is the following:
[Config Step18]
description = "AS-External LSAs of 'type 1 metric' with different advertised destination"
network = OSPF_Area_External
# ToDo: R5 has a cost of 13 to the external network
*.configurator.config = xml("<config> \
<interface hosts='R3' towards='R4' address='192.168.0.x' netmask='255.255.255.x' /> \
<interface hosts='R4' towards='R3' address='192.168.0.x' netmask='255.255.255.x' /> \
\
<interface hosts='R3' towards='N1.*' address='192.168.9.x' netmask='255.255.255.x' /> \
<interface hosts='R5' towards='N2.*' address='192.168.10.x' netmask='255.255.255.x' /> \
\
<interface among='host1 host2 R1 R2 R3' address='192.168.11.x' netmask='255.255.255.x' /> \
<interface among='R3 R4 R5 host3' address='192.168.22.x' netmask='255.255.255.x' /> \
\
<route hosts='host*' destination='*' netmask='0.0.0.0' interface='eth0' /> \
</config>")
*.R*.ospf.ospfConfig = xmldoc("ASConfig_Area_ExternalRoute_Type1.xml")
The OSPF configuration:
<?xml version="1.0"?>
<OSPFASConfig xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="OSPF.xsd">
<!-- Areas -->
<Area id="0.0.0.0">
<AddressRange address="R3>R4" mask="R3>R4" />
<AddressRange address="R4>R3" mask="R4>R3" />
</Area>
<Area id="0.0.0.1">
<AddressRange address="R1>switch1" mask="R1>switch1" />
<AddressRange address="R1>R2" mask="R1>R2" />
<AddressRange address="R1>R3" mask="R1>R3" />
<AddressRange address="R2>switch2" mask="R2>switch2" />
<AddressRange address="R2>R1" mask="R2>R1" />
<AddressRange address="R2>R3" mask="R2>R3" />
<AddressRange address="R3>R1" mask="R3>R1" />
<AddressRange address="R3>R2" mask="R3>R2" />
</Area>
<Area id="0.0.0.2">
<AddressRange address="R4>R5" mask="R4>R5" />
<AddressRange address="R5>R4" mask="R5>R4" />
<AddressRange address="R5>switch3" mask="R5>switch3" />
</Area>
<!-- Routers -->
<Router name="R1" RFC1583Compatible="true">
<BroadcastInterface ifName="eth0" areaID="0.0.0.1" interfaceMode="Passive" />
<PointToPointInterface ifName="ppp0" areaID="0.0.0.1" />
<PointToPointInterface ifName="ppp1" areaID="0.0.0.1" />
</Router>
<Router name="R2" RFC1583Compatible="true">
<BroadcastInterface ifName="eth0" areaID="0.0.0.1" interfaceMode="Passive" />
<PointToPointInterface ifName="ppp0" areaID="0.0.0.1" />
<PointToPointInterface ifName="ppp1" areaID="0.0.0.1" />
</Router>
<Router name="R3" RFC1583Compatible="true">
<PointToPointInterface ifName="ppp0" areaID="0.0.0.1" />
<PointToPointInterface ifName="ppp1" areaID="0.0.0.1" />
<PointToPointInterface ifName="ppp2" areaID="0.0.0.0" />
<ExternalInterface toward="N1" advertisedExternalNetworkAddress="R3>N1" advertisedExternalNetworkMask="R3>N1" externalInterfaceOutputCost="10" externalInterfaceOutputType="Type1" />
</Router>
<Router name="R4" RFC1583Compatible="true">
<PointToPointInterface ifName="ppp0" areaID="0.0.0.2" />
<PointToPointInterface ifName="ppp1" areaID="0.0.0.0" />
</Router>
<Router name="R5" RFC1583Compatible="true">
<BroadcastInterface ifName="eth0" areaID="0.0.0.2" interfaceMode="Passive" />
<PointToPointInterface ifName="ppp0" areaID="0.0.0.2" />
<ExternalInterface toward="N2" advertisedExternalNetworkAddress="R5>N2" advertisedExternalNetworkMask="R5>N2" externalInterfaceOutputCost="5" externalInterfaceOutputType="Type1" />
</Router>
</OSPFASConfig>
Results¶
[explanation]
Sources:
omnetpp.ini
,
OSPF_Area_External.ned
,
ASConfig_Area_ExternalRoute_Type1.xml