192
Chapter 5
Interconnecting OSPF Areas
Solution
The configuration given below is a suggested solution to the lab. Notice that
RouterB uses the command area 10 stub to specify that Area 10 is a stub
area. Also notice that RouterC uses the command area 20 stub no-
summary
to specify that Area 20 is a totally stubby area. Recall that the dif-
ference between a stub area and a totally stubby area is that a totally stubby
area does not receive summary Link State Advertisements. Another impor-
tant design distinction is that the concept of a totally stubby area is specific
to Cisco routers.
RouterA
!
version 11.2
no services udp-small-servers
no services tcp-small-servers
!
hostname RouterA
!
interface Ethernet0
ip address 2.2.2.2 255.255.255.0
!
interface Ethernet1
ip address 3.3.3.3 255.255.255.0
!
RouterB
RouterA
RouterC
Ethernet
Ethernet
1.1.1.1/24
e0
e1
e0
e1
2.2.2.1/24 e0
e1
2.2.2.2/24
4.4.4.4/24
Area 10
Area 0
Area 20
3.3.3.3/24
3.3.3.2/24
Stub Area
Totally Stubby
Area
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