Step 2. BGP Scenario with E-BGP session only¶
Goals¶
[explanation]
Configuration¶
This step uses the following network:
network BGP_Topology_1
{
@display("bgb=1050.615,594.405");
submodules:
configurator: Ipv4NetworkConfigurator {
@display("p=93,44");
}
visualizer: IntegratedMultiCanvasVisualizer {
@display("p=243.2025,43.536247");
}
RB2: Router {
@display("p=710.955,349.65");
}
RB3: Router {
@display("p=710.955,441.225");
}
RB4: Router {
@display("p=815.85,399.6");
}
RB1: Router {
@display("p=607.725,399.6");
}
RA4: Router {
@display("p=349.79123,400.83374");
}
RA2: Router {
@display("p=244.70375,342.285");
}
RA3: Router {
@display("p=244.70375,442.86874");
}
RA1: Router {
@display("p=153.1275,393.32748");
}
switch1: EtherSwitch {
@display("p=54.045,391.82623");
}
switch2: EtherSwitch {
@display("p=244.70375,250.70874");
}
switch3: EtherSwitch {
@display("p=244.70375,534.445");
}
switch4: EtherSwitch {
@display("p=710.955,249.75");
}
switch5: EtherSwitch {
@display("p=710.955,532.8");
}
switch6: EtherSwitch {
@display("p=944.055,397.935");
}
host0: StandardHost {
@display("p=53.28,251.415");
}
host1: StandardHost {
@display("p=944.055,261.405");
}
connections:
RB2.ethg++ <--> Eth100M <--> RB4.ethg++;
RB3.ethg++ <--> Eth100M <--> RB4.ethg++;
RB1.ethg++ <--> Eth100M <--> RB2.ethg++;
RB1.ethg++ <--> Eth100M <--> RB3.ethg++;
RB1.ethg++ <--> Eth100M <--> RA4.ethg++;
RA4.ethg++ <--> Eth100M <--> RA2.ethg++;
RA3.ethg++ <--> Eth100M <--> RA4.ethg++;
RA2.ethg++ <--> Eth100M <--> RA1.ethg++;
RA1.ethg++ <--> Eth100M <--> RA3.ethg++;
switch1.ethg++ <--> Eth100M <--> RA1.ethg++;
RA2.ethg++ <--> Eth100M <--> switch2.ethg++;
RA3.ethg++ <--> Eth100M <--> switch3.ethg++;
RB2.ethg++ <--> Eth100M <--> switch4.ethg++;
RB3.ethg++ <--> Eth100M <--> switch5.ethg++;
switch1.ethg++ <--> Eth100M <--> host0.ethg++;
switch6.ethg++ <--> Eth100M <--> host1.ethg++;
RB4.ethg++ <--> Eth100M <--> switch6.ethg++;
}
The configuration in omnetpp.ini
is the following:
[Config Step2]
description = "BGP Scenario with E-BGP session only"
network = BGP_Topology_1
*.configurator.config = xml("<config> \
<interface hosts='RA4' names='eth0' address='192.168.x.x' netmask='255.x.x.x'/> \
<interface hosts='RB1' names='eth2' address='192.168.x.x' netmask='255.x.x.x'/> \
\
<interface among='host0 RA*' address='10.x.x.x' netmask='255.x.x.x'/> \
<interface hosts='RA*' address='10.x.x.x' netmask='255.x.x.x'/> \
\
<interface among='host1 RB*' address='20.x.x.x' netmask='255.x.x.x'/> \
<interface hosts='RB*' address='20.x.x.x' netmask='255.x.x.x'/> \
\
<route hosts='RA4' destination='*' netmask='0.0.0.0' interface='eth0' /> \
<route hosts='RB1' destination='*' netmask='0.0.0.0' interface='eth2' /> \
<route hosts='host*' destination='*' netmask='0.0.0.0' interface='eth0' /> \
</config>")
# OSPF configuration
*.R*.hasOspf = true
*.R*.ospf.ospfConfig = xmldoc("OSPFConfig_EBGP.xml")
*.RA4.ipv4.routingTable.routerId = "10.0.0.5"
*.RB1.ipv4.routingTable.routerId = "20.0.0.18"
# BGP configuration
*.RA4.hasBgp = true
*.RB1.hasBgp = true
*.R*.bgp.bgpConfig = xmldoc("BGPConfig_EBGP.xml")
# enable OSPF redistribution
*.RA4.bgp.redistributeOspf = "O IA"
*.RB1.bgp.redistributeOspf = "O IA"
The BGP configuration:
<?xml version="1.0" encoding="ISO-8859-1"?>
<BGPConfig xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="BGP.xsd">
<TimerParams>
<connectRetryTime> 120 </connectRetryTime>
<holdTime> 180 </holdTime>
<keepAliveTime> 60 </keepAliveTime>
<startDelay> 60 </startDelay>
</TimerParams>
<AS id="64500">
<!--router RA4-->
<Router interAddr="10.0.0.1" />
</AS>
<AS id="64600">
<!--router RB1-->
<Router interAddr="20.0.0.6" />
</AS>
<!--bi-directional E-BGP session between RA4 and RB1-->
<Session id="1">
<Router exterAddr="192.168.0.2"/>
<Router exterAddr="192.168.0.1"/>
</Session>
</BGPConfig>
Results¶
[explanation]
Sources: BGP_Topology_1.ned
,
omnetpp.ini
,
OSPFConfig_EBGP.xml
,
BGPConfig_EBGP.xml