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Table Of Contents

Step 18b. AS-External LSAs of ‘type 2 metric’ with different advertised destination

Goals

[explanation]

Configuration

This configuration is based on step 18.

The configuration in omnetpp.ini is the following:

[Config Step18b]
description = "AS-External LSAs of 'type 2 metric' with different advertised destination"
extends = Step18

*.R*.ospf.ospfConfig = xmldoc("ASConfig_Area_ExternalRoute_Type2.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="Type2" />
  </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="Type2" />
  </Router>

</OSPFASConfig>

Discussion

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Step 18a. AS-External LSAs of ‘type 1 metric’ with the same advertised destination
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Step 18c. AS-External LSAs of ‘type 2 metric’ with the same advertised destination