The Ospf route rerunning to rip Route3 is the self-made system routing protocol ASBR, and route redistribution is performed through Route0. Route0, Route1, and Route2 are the backbone areas area0. network segment Division: route0-route1 172.16.0.0/255.172.16.1.0/255.172.16.2.0/24Route3-route0 10.0.0.0/24Route0 configuration: Basic excuses configuration: Int f0/0 ip add 172.16.0.1 255.255.255.0 No shut (this command is displayed only once in configuration) int f0/1 ip add 10.0.0.2 255.255.255.0Int f1/0 ip add 172.16.2.1 255.255.255.0Ospf configuration: Conf) router ospf 100Net 172.16.0.0 0.0.0.255 Rea 0Net 172.16.2.0 0.0.0.255 area 0Net 10.0.0.0 0.0.0.255 area 0 Route 1 and Route 2 are configured similarly and will not be displayed here. Next, Configure Route 3 Rip Router: basic interface configuration: Int f0/0 ip add 192.168.0.1 255.255.255.0Int f0/1 ip add 10.0.0.1 255.255.255.0 re-division Ospf configuration: Conf) router ospf 20Net 172.16.0.0 0.0.0.255 area 0Net 172.16.2.0 0.0.0.255 area 0 Redistribute rip subents route re-division to Rip: Conf) route ripVersion 2Net 10.0.0.0Net 192.168.0.0 Add a default route to ASBR router: Conf) ip route 0.0.0.0 0.0.0.0 10.0.0.0.2 _______________________________ configuration information: R0: Codes: C-connected, S-static, I-IGRP, R-RIP, M-mobile, B-BGP D-VPN, EX-OSPF external, O-OSPF, IA-OSPF inter area N1-ospf nssa external type 1, N2-ospf nssa external type 2 E1-OSPF external type 1, e2-OSPF external type 2, E-EGP I-IS, L1-IS level-1, L2-IS level-2, ia-IS inter area *-candidate default, U-per-user static route, o-odr p-periodic downloaded static routeGateway of last resort is not set 10.0.0.0/24 is subnetted, 1 subnetsC 10.0.0.0 is directly connected, FastEthernet0/1 172.16.0.0/24 is subnetted, 3 subnetsC 172.16.0.0 is directly connected, FastEthernet0/0O 172.16.1.0 [110/2] via 172.16.0.2, 01:17:50, FastEthernet0/0C 172.16.2.0 is directly connected, ethernet1/0 ___________________ show ip ospf int FastEthernet0/0 is up, line protocol is up Internet address is 172.16.0.1/24, Area 0 Process ID 100, Router ID 172.16.2.1, Network Type BROADCAST, cost: 1 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 172.16.2.1, Interface address 172.16.0.1 Backup Designated Router (ID) 172.16.1.1, Interface address 172.16.0.2 Timer intervals configured, hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:07 Index 1/1, flood queue length 0 Next 0x0 (0)/0x0 (0) last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, adjacent neighbor count is 1 Adjacent with neighbor 172.16.1.1 (Backup Designated Router) Suppress hello for 0 neighbor (s) Ethernet1/0 is up, line protocol is up Internet address is 172.16.2.1/24, area 0 Process ID 100, Router ID 172.16.2.1, Network Type BROADCAST, Cost: 10 Transmit Delay is 1 sec, State DR, Priority 1 Designated Router (ID) 172.16.2.1, interface address 172.16.2.1 Backup Designated Router (ID) 172.16.2.2, Interface address 172.16.2.2 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:03 Index 2/2, flood queue length 0 Next 0x0 (0)/0x0 (0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 172.16.2.2 (Backup Designated Router) Suppress hello for 0 neighbor (s) FastEthernet0/1 is up, up, line protocol is up Internet address is 10.0.0.2/24, Area 0 Process ID 100, Router ID 172.16.2.1, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, priority 1 Designated Router (ID) 172.16.2.1, Interface address 10.0.0.2 No backup designated router on this network Timer intervals configured, Hello 10, Dead 40, Wait 40, retransmit 5 Hello due in 00:00:03 Index 3/3, flood queue length 0 Next 0x0 (0)/0x0 (0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 0, Adjacent neighbor count is 0 Suppress hello for 0 neighbor (s) _________________________ R1: ________________ Show ip routeCodes: C-connected, S-static, I-IGRP, R-RIP, M-mobile, B-BGP D-VPN, EX-VPN external, o-OSPF, IA-OSPF inter area N1-ospf nssa external type 1, N2-ospf nssa external type 2 E1-OSPF external type 1, E2-OSPF external type 2, e-EGP I-IS, L1-IS level-1, L2-IS level-2, ia-IS inter area *-candidate default, u-per-user static route, o-odr p-periodic downloaded static route Gateway of last resort is not set 10.0.0.0/24 is subnetted, 1 subnetsO 10.0.0.0 [110/2] via 172.16.0.1, 00:48:00, FastEthernet0/0 172.16.0.0/24 is subnetted, 3 subnetsC 172.16.0.0 is directly connected, FastEthernet0/0C connector is directly connected, FastEthernet0/1O 172.16.2.0 [110/11] via success, 01:26:34, fastEthernet0/0 [110/11] via 172.16.1.2, 01:25:27, FastEthernet0/1 ________________ show ip ospf intFastEthernet0/0 is up, line protocol is up Internet address is 172.16.0.2/24, area 0 Process ID 200, Router ID 172.16.1.1, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State BDR, Priority 1 Designated Router (ID) 172.16.2.1, interface address 172.16.0.1 Backup Designated Router (ID) 172.16.1.1, Interface address 172.16.0.2 Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:04 Index 1/1, flood queue length 0 Next 0x0 (0)/0x0 (0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 172.16.2.1 (Designated Router) Suppress hello for 0 neighbor (s) FastEthernet0/1 is up, line protocol is up Internet address is 172.16.1.1/24, Area 0 Process ID 200, Router ID 172.16.1.1, Network Type BROADCAST, Cost: 1 Transmit Delay is 1 sec, State DR, priority 1 Designated Router (ID) 172.16.1.1, Interface address 172.16.1.1 Backup Designated Router (ID) 172.16.2.2, Interface address 172.16.1.2 Timer intervals configured, Hello 10, Dead 40, Wait 40, retransmit 5 Hello due in 00:00:04 Index 2/2, flood queue length 0 Next 0x0 (0)/0x0 (0) Last flood scan length is 1, maximum is 1 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 172.16.2.2 (Backup Designated Router) suppress hello for 0 neighbor (s) _________________________ R3: __________________ show ip route 10.0.0.0/24 is subnetted, 1 subnetsC 10.0.0.0 is directly connected, fastEthernet0/1 S * 0.0.0.0/0 [1/0] via 10.0.0.2 _______________ show ip ospfRouting Process "ospf 20" with ID 192.168.0.1 Supports only single TOS (TOS0) routes Supports opaque LSA It is an area border router SPF schedule delay 5 secs, Hold time between two SPFs 10 secs Minimum LSA interval 5 secs. minimum LSA arrival 1 secs Number of external LSA 2. checksum Sum 0x013118 Number of opaque as lsa 0. checksum Sum 0x000000 Number of DCbitless external and opaque as lsa 0 Number of DoNotAge external and opaque as lsa 0 Number of areas in this router is 2. 2 normal 0 stub 0 nssa External flood list length 0 Area BACKBONE (0) (Inactive) number of interfaces in this area is 0 Area has no authentication SPF algorithm executed 2 times Area ranges are Number of LSA 1. checksum Sum 0x00feff Number of opaque link LSA 0. checksum Sum 0x000000 Number of DCbitless LSA 0 Number of indication LSA 0 Number of DoNotAge LSA 0 Flood list length 0