Using distribution lists plus ACLs to control routing updates

Topology Description:

R1 and R2 run Eigrp,r2 and R3 and R4 run OSPF for bidirectional redistribution routes

Experiment Purpose: Control routing updates using distribution lists

Familiar with the role of ACL permit and deny in route redistribution

Distribute-list In/out interface/Routing protocol

One, basic redistribution, each router to learn all the routes

R2:

Ospf:redistribute EIGRP Subnets

Eigrp:redistribute OSPF metric 1544 100 255 1 1500

Look at the routing table on R1:

R1#show IP route

CODES:C-connected, s-static, R-rip, M-mobile, B-BGP

D-EIGRP, Ex-eigrp 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

I-is-is, Su-is-is Summary, L1-is-is level-1, L2-is-is level-2

Ia-is-is Inter area, *-candidate default, U-per-user static route

O-ODR, P-periodic downloaded static route

Gateway of last resort are not set

34.0.0.0/24 is subnetted, 1 subnets

D EX 34.1.1.0 [170/2195456] via 12.1.1.2, 00:00:23, serial0/0

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

D EX 2.2.2.0 [170/2195456] via 12.1.1.2, 00:00:23, serial0/0

3.0.0.0/32 is subnetted, 1 subnets

D EX 3.3.3.3 [170/2195456] via 12.1.1.2, 00:00:23, serial0/0

4.0.0.0/32 is subnetted, 1 subnets

D EX 4.4.4.4 [170/2195456] via 12.1.1.2, 00:00:23, serial0/0

23.0.0.0/24 is subnetted, 1 subnets

D EX 23.1.1.0 [170/2195456] via 12.1.1.2, 00:00:23, serial0/0

12.0.0.0/24 is subnetted, 1 subnets

C 12.1.1.0 is directly connected, serial0/0