18. Inter-domain summary and out-of-domain summary of OSPF configuration experiment
1. Inter-domain summary and domain × × total resolution
2. Experimental topology
3. Experimental configuration
R1 configuration
Interface Loopback0
Ip address 1.1.1.1 255.255.255.0
Interface Serial0/0
Ip address 12.1.1.1 255.255.255.0
Interface FastEthernet1/0
Ip address 120.1.1.1 255.255.255.0
Router ospf 110
Router-id 8.8.8.1
Network 1.1.1.0 0.0.0.255 area 0
Network 12.1.1.0 0.0.0.255 area 0
Network 120.1.1.0 0.0.0.255 area 0
R2 configuration
Interface Loopback0
Ip address 2.2.2.2 255.255.255.0
Interface Serial0/0
Ip address 12.1.1.2 255.255.255.0
Interface Serial0/1
Ip address 23.1.1.2 255.255.255.0
Interface FastEthernet1/0
Ip address 120.1.1.2 255.255.255.0
Router ospf 110
Router-id 8.8.8.2
Network 2.2.2.0 0.0.0.255 area 0
Network 12.1.1.0 0.0.0.255 area 0
Network 23.1.1.0 0.0.0.255 area 1
Network 120.1.1.0 0.0.0.255 area 0
R3 configuration
Interface Loopback0
Ip address 3.3.3.3 255.255.255.0
Interface Serial0/0
Ip address 34.1.1.3 255.255.255.0
Interface Serial0/1
Ip address 23.1.1.3 255.255.255.0
Router ospf 110
Router-id 8.8.8.3
Redistribute rip subnets
Network 3.3.3.0 0.0.0.255 area 1
Network 23.1.1.0 0.0.0.255 area 1
Router rip
Version 2
Network 34.0.0.0
No auto-summary
R4 configuration
Interface Loopback0
Ip address 4.4.4.4 255.255.255.0
Interface Serial0/0
Ip address 34.1.1.4 255.255.255.0
Router rip
Version 2
Network 4.0.0.0
Network 34.0.0.0
No auto-summary
4. Inter-domain summary
Set up four loops on R3 and announce the entry into Area1
1o16:192.168.16.1/24
1o17:192.168.17.1/24
1o18:192.168.18.1/24
1o19:192.168.19.1/24
R3 configuration
Interface Loopback16
Ip address 192.168.16.1 255.255.255.0
Interface Loopback17
Ip address 192.168.17.1 255.255.255.0
Interface Loopback18
Ip address 192.168.18.1 255.255.255.0
Interface Loopback19
Ip address 192.168.19.1 255.255.255.0
Router ospf 110
Router-id 8.8.8.3
Network 192.168.16.0 0.0.0.255 area 1
Network 192.168.17.0 0.0.0.255 area 1
Network 192.168.18.0 0.0.0.255 area 1
Network 192.168.19.0 0.0.0.255 area 1
At this point, R1 receives four detailed routes, and we do an inter-domain summary on R2.
Note: the inter-domain summary should be summarized on all ABR in the local domain.
5. Domain × × total
Set up four loops on R4 and announce the entry into RIP
1o16:10.10.16.1/24
1o17:10.10.17.1/24
1o18:10.10.18.1/24
1o19:10.10.19.1/24
R4 configuration
Interface Loopback16
Ip address 10.10.16.1 255.255.255.0
Interface Loopback17
Ip address 10.10.17.1 255.255.255.0
Interface Loopback18
Ip address 10.10.18.1 255.255.255.0
Interface Loopback19
Ip address 10.10.19.1 255.255.255.0
Router rip
Network 10.0.0.0
Before summarization
After summary
