Control routing updates using ACLs and Prefix-list plus Route-map

Topology

Description: Left run OSPF, right run EIGRP, redistribution routing protocol

Controlling routing updates with access lists and prefix lists

Rejected routing of 5.5.0.0 5.5.1.0 5.5.2.0 5.5.3.0 in the OSPF routing protocol domain

Deny routing of 15.5.16.0/20 15.5.64.0/18 in OSPF routing protocol domain

Configuration Instructions

1. Configure the IP address on all routers and configure the routing protocol as shown in the figure above

2. Configure redistribution on R3 to ensure R1 See all loopback routing R5

R1#show IP route OSPF

34.0.0.0/24 is subnetted, 1 subnets

O E2 34.1.1.0 [110/20] via 12.1.1.2, 00:00:12, serial0/0

5.0.0.0/24 is subnetted, 6 subnets

O E2 5.5.0.0 [110/20] via 12.1.1.2, 00:00:12, serial0/0

O E2 5.5.1.0 [110/20] via 12.1.1.2, 00:00:12, serial0/0

O E2 5.5.2.0 [110/20] via 12.1.1.2, 00:00:12, serial0/0

O E2 5.5.3.0 [110/20] via 12.1.1.2, 00:00:12, serial0/0

O E2 5.5.4.0 [110/20] via 12.1.1.2, 00:00:12, serial0/0

O E2 5.5.5.0 [110/20] via 12.1.1.2, 00:00:12, serial0/0

23.0.0.0/24 is subnetted, 1 subnets

O 23.1.1.0 [110/128] via 12.1.1.2, 00:32:48, serial0/0

45.0.0.0/24 is subnetted, 1 subnets

O E2 45.1.1.0 [110/20] via 12.1.1.2, 00:00:12, serial0/0

15.0.0.0/8 is variably subnetted, 4 subnets, 4 masks

O E2 15.4.0.0/16 [110/20] via 12.1.1.2, 00:00:12, serial0/0

O E2 15.5.16.0/20 [110/20] via 12.1.1.2, 00:00:12, serial0/0

O E2 15.5.64.0/18 [110/20] via 12.1.1.2, 00:00:12, serial0/0

O E2 15.5.129.0/26 [110/20] via 12.1.1.2, 00:00:12, serial0/0

r1#

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