OSPF CONFIGURATION EXAMPLE
Area 5 is connected to the backbone area by way of ABR1 and ABR2. It is located in Chicago and has the following characteristics:
•Network number 160.26.x.x
•1 identified VLAN (Chi_160_26_26)
•2 internal routers
•A virtual link from ABR1 to ABR2 that traverses both internal routers.
In the event that the link between either ABR and the backbone fails, the virtual link provides a connection for all routers that become discontiguous from the backbone.
Area 6 is a stub area connected to the backbone by way of ABR1. It is located in Los Angeles and has the following characteristics:
•Network number 161.48.x.x
•1 identified VLAN (LA_161_48_2)
•3 internal routers
•Uses default routes for
Two router configurations for the example in Figure
CONFIGURATION FOR ABR1
The following is the configuration for the router labeled ABR1:
create vlan HQ_10_0_2 create vlan HQ_10_0_3 create vlan LA_161_48_2 create vlan Chi_160_26_2
config vlan HQ_10_0_2 ipaddress 10.0.2.1 255.255.255.0 config vlan HQ_10_0_3 ipaddress 10.0.3.1 255.255.255.0 config vlan LA_161_48_2 ipaddress 161.48.2.2 255.255.255.0 config vlan Chi_160_26_2 ipaddress 160.26.2.1 255.255.255.0
create ospf area 0.0.0.5 create ospf area 0.0.0.6
enable ipforwarding
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