CCNP experiment: bidirectional redistribution of multiple processes solves the problem of OSPF region segmentation

[Lab environment]

Powerful fireworks

The C3640-IK9O3S-M Version 12.4 (10)

Veryhuo.com

[PURPOSE]

Liehuo.net

Multi-process bidirectional redistribution solves the problem of OSPF region segmentation

Veryhuo.com

[Experiment topology]

Veryhuo.com

Fire net

[Experiment description] liehuo.net

Area 2 and Area 0 are not directly connected. Different OSPF processes are created on R2 to declare S0/0 and S0/1 respectively, and then the areas are re-distributed to solve the problem of Area segmentation. Lie-fire-network

[Experiment step] gwang.com

1. R1 basic configuration liehuo.net

!
Interface Loopback0
Ip address 1.1.1.1 255.255.255.255
!
Interface Serial0/0
Ip address 12.0.0.1 255.255.255.0
Clock rate 64000
!
Router ospf 110
Router-id 1.1.1.1
Network 1.1.1.1 0.0.0.0 area 0
Network 12.0.0.0 0.0.0.255 area 1
! Veryhuo.com

2. R2 basic configuration liehuo.net

!
Interface Serial0/0
Ip address 12.0.0.2 255.255.255.0
!
Interface Serial0/1
Ip address 23.0.0.1 255.255.255.0
Clock rate 64000
! Liehuo.net

3. R3 basic configuration veryhuo.com

!
Interface Loopback0
Ip address 3.3.3.3 255.255.255.255
!
Interface Serial0/1
Ip address 23.0.0.2 255.255.255.0
!
Router ospf 110
Router-id 3.3.3.3
Log-adjacency-changes
Network 3.3.3.3 0.0.0.0 area 2
Network 23.0.0.0 0.0.0.255 area 2
!

Liehuo.net

4. Create OSPF 110 on R2 and declare the 12.0.0.0/24 network segment on Area 1.

Liehuo.net

Router ospf 110
Router-id 2.2.2.2
Network 12.0.0.0 0.0.0.255 area 1

Veryhuo.com

5. Create OSPF 120 on R2 and declare the 23.0.0.0/24 network segment veryhuo.com on Area 2.

Router ospf 120
// Different OSPF processes need to be configured with different Router-IDS
Router-id 2.2.2.23
Network 23.0.0.0 0.0.0.255 area 2 liehuo.net

6. re-distribute OSPF 110 route entries to OSPF 120

Veryhuo.com

Router ospf 110
// Use the E1 type for redistribution
Redistribute ospf 120 metric-type 1 subnets veryhuo.com

7. Route entries of OSPF 120 are heavily distributed to OSPF 110.

Router ospf 120
Redistribute ospf 110 metric-type 1 subnets fire net

8. Check the R1 route table
// You can see that the route entry of Area 2 appears as E1 in the routing table liehuo.net

R1 # sh ip ro liehuo.net

1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback0
3.0.0.0/32 is subnetted, 1 subnets
O E1 3.3.3.3 [110/129] via 12.0.0.2, 00:13:08, Serial0/0
23.0.0.0/24 is subnetted, 1 subnets
O E1 23.0.0.0 [110/128] via 12.0.0.2, 00:13:08, Serial0/0
12.0.0.0/24 is subnetted, 1 subnets
C 12.0.0.0 is directly connected, Serial0/0 veryhuo.com

9. Check the R3 route table
// You can see that the route entries of Area 0 and Area 1 appear in the routing table veryhuo.com with E1

R3 # sh ip ro veryhuo.com

1.0.0.0/32 is subnetted, 1 subnets
O E1 1.1.1.1 [110/129] via 23.0.0.1, 00:13:20, Serial0/1
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback0
23.0.0.0/24 is subnetted, 1 subnets
C 23.0.0.0 is directly connected, Serial0/1
12.0.0.0/24 is subnetted, 1 subnets
O E1 12.0.0.0 [110/128] via 23.0.0.1, 00:13:20, Serial0/1 liehuo.net