Use distribution lists to filter Routing and routing totals, ring-proof

Topology map

Description: IP and interface configuration as shown above, run OSPF on the left, run EIGRP on the right

Experiment Purpose: To use distribution list to filter routing

Use of routing rollup to reduce the burden on routers and the problems associated with redistribution of routes

Specific requirements: R2 filter out 1.1.1.0 of the route, R5 in the notification to the R4 filter out 172.16.55.0 of the route.

OSPF summarizes routes when EIGRP is advertised to the 10.0.0.0/8

EIGRP routing to OSPF when routing is aggregated into 172.16.0.0/16

Loop-back routing can be used without aggregation

Experiment steps:

1. Configure IP addresses and routing protocols

2. Configure redistribution on the R3

Configuration commands:

Router EIGRP 90

Redistribute OSPF metric 1544 100 255 1 1500

Network 33.33.33.0 0.0.0.255

Network 172.16.34.0 0.0.0.255

No auto-summary

!

router OSPF 110

Router-id 3.3.3.3

Log-adjacency-changes

Redistribute EIGRP subnets Tag 8888

Network 3.3.3.0 0.0.0.255 Area 0

Network 10.2.2.0 0.0.0.255 Area 0

R1#show IP route

1.0.0.0/24 is subnetted, 1 subnets

C 1.1.1.0 is directly connected, Loopback0

2.0.0.0/24 is subnetted, 1 subnets

O 2.2.2.0 [110/65] via 10.1.1.2, 00:21:34, serial0/0

33.0.0.0/24 is subnetted, 1 subnets

O E2 33.33.33.0 [110/20] via 10.1.1.2, 00:21:34, serial0/0

3.0.0.0/32 is subnetted, 1 subnets

O 3.3.3.3 [110/129] via 10.1.1.2, 00:21:34, serial0/0

4.0.0.0/24 is subnetted, 1 subnets

O E2 4.4.4.0 [110/20] via 10.1.1.2, 00:21:34, serial0/0

5.0.0.0/24 is subnetted, 1 subnets

O E2 5.5.5.0 [110/20] via 10.1.1.2, 00:21:34, serial0/0

172.16.0.0/24 is subnetted, 3 subnets

O E2 172.16.55.0 [110/20] via 10.1.1.2, 00:21:37, serial0/0

O E2 172.16.45.0 [110/20] via 10.1.1.2, 00:21:37, serial0/0

O E2 172.16.34.0 [110/20] via 10.1.1.2, 00:21:37, serial0/0

10.0.0.0/24 is subnetted, 2 subnets

O 10.2.2.0 [110/128] via 10.1.1.2, 00:21:37, serial0/0

C 10.1.1.0 is directly connected, serial0/0

At this point, all routers have routes.