14. LSA3 of OSPF configuration experiment
1. LSA3 Network Summary LSA (Network summary LSA) parsing
LSA type advertiser propagates range advertisements content Link IDADV Router remarks LSA1 all routers have the same Area route, topology RIDRID
LSA2DR only MA network with the same Area mask and topology DR IPDR RID
The last ABR of LSA3, the entire OSPF domain route, mask, Metric route, ABR RID route is marked IA
LSA1 Router LSA (Router LSA)
LSA2 Network LSA (Network LSA)
LSA3 Network Summary LSA (Network summary LSA)
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
Face 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 Serial0/1
Ip address 23.1.1.3 255.255.255.0
Router ospf 110
Router-id 8.8.8.3
Network 3.3.3.0 0.0.0.255 area 1
Network 23.1.1.0 0.0.0.255 area 1
4. Conclusion verification
Link ID is the route and ADV Router is ABR Router ID.
Advertised content is route, mask, Metric
