Section 2: IP IGP Protocols (30 Points)

Section 2.1: OSPF (11 Points)

• Configure OSPF according to the diagram in Figure 4-10. R1-s0/1, R2-s0/1, R4-s0/1, and R5-s0/1 are to be part of the OSPF area 0.

• R2-s0/0 and R3-S0/0 are to be configured as OSPF area 1.

• R1-e0/0 is to be configured as OSPF area 11.

• R1-e0/1, R3-fa0/0, R3-bri0/0, R5-fa0/0, R5 fa0/1, R5-bri0/0, and R6-e0/0 are to be configured as OSPF area 22.

• R3-fa0/1 is to be configured as OSPF area 33.

If you configured this correctly as shown in Example 4-20 through Example 4-25 you have scored 6 points:

• Configure the loopback addresses to be part of the OSPF process.

If you configured this correctly as shown in Example 4-20 through Example 4-25 you have scored 2 points:

• Make sure you are able to ping any OSPF interface from any router.

If you configured this correctly as shown in Example 4-20 through Example 4-25 you have scored 3 points.

This is a basic OSPF configuration. You might think the IGP topology looks unusual, but the idea is to make you start from the basic configuration to more complex environments in the following lab exercises.

An important thing to observe is that although we have five OSPF areas, we will need only one virtual link to be configured. This is because the ABR routers R1 are connected to area 0 and area 11, and R5 is connected to area 0 and area 22.

Example 4-20 through Example 4-25 show the basic OSPF configuration and the output from the routing table. It is important to observe the right interfaces or subnets configured to the right area.

Example 4-20. OSPF Configuration: R1 Output

 R1#show run interface Loopback0  ip address 160.10.1.1 255.255.255.0  ip ospf network point-to-point ! interface Ethernet0/0  ip address 160.10.11.1 255.255.255.0  half-duplex ! interface Ethernet0/1  ip address 160.10.25.1 255.255.255.0  no ip redirects  half-duplex ! interface Serial0/1  ip address 160.10.37.1 255.255.255.0  encapsulation frame-relay  ip ospf network point-to-multipoint  ! router ospf 1  log-adjacency-changes  network 160.10.1.0 0.0.0.255 area 0  network 160.10.11.0 0.0.0.255 area 11  network 160.10.25.0 0.0.0.255 area 22  network 160.10.37.0 0.0.0.255 area 0 ! ! R1#show ip route ospf      160.10.0.0/16 is variably subnetted, 16 subnets, 2 masks O IA    160.10.32.0/24 [110/112] via 160.10.37.2, 00:00:04, Serial0/1 O       160.10.37.5/32 [110/112] via 160.10.37.2, 00:00:04, Serial0/1 O IA    160.10.33.0/24 [110/113] via 160.10.37.2, 00:00:04, Serial0/1 O       160.10.37.4/32 [110/112] via 160.10.37.2, 00:00:04, Serial0/1 O       160.10.37.2/32 [110/64] via 160.10.37.2, 00:00:04, Serial0/1 O       160.10.15.0/24 [110/1572] via 160.10.25.5, 00:02:18, Ethernet0/1 O       160.10.2.0/24 [110/65] via 160.10.37.2, 00:00:04, Serial0/1 O IA    160.10.3.0/24 [110/113] via 160.10.37.2, 00:00:04, Serial0/1 O       160.10.6.0/24 [110/12] via 160.10.25.5, 00:02:18, Ethernet0/1 O       160.10.4.0/24 [110/113] via 160.10.37.2, 00:00:04, Serial0/1 O       160.10.5.0/24 [110/113] via 160.10.37.2, 00:00:04, Serial0/1 O       160.10.22.0/24 [110/11] via 160.10.25.5, 00:02:19, Ethernet0/1 R1# 

Example 4-21. OSPF Configuration: R2 Output

 R2#show run interface Loopback0  ip address 160.10.2.2 255.255.255.0  ip ospf network point-to-point ! interface Serial0/0  ip address 160.10.32.2 255.255.255.0  encapsulation frame-relay  ip ospf network point-to-point  ! interface Serial0/1  ip address 160.10.37.2 255.255.255.0  encapsulation frame-relay  ip ospf network point-to-multipoint  ! router ospf 1  log-adjacency-changes  area 1 virtual-link 160.10.3.3  redistribute eigrp 400 metric 100 subnets  network 160.10.2.0 0.0.0.255 area 0  network 160.10.32.0 0.0.0.255 area 1  network 160.10.37.0 0.0.0.255 area 0 ! ! R2#sh ip route ospf      160.10.0.0/16 is variably subnetted, 16 subnets, 2 masks O       160.10.37.5/32 [110/48] via 160.10.37.5, 00:00:34, Serial0/1 O IA    160.10.33.0/24 [110/49] via 160.10.32.3, 00:00:34, Serial0/0 O       160.10.37.4/32 [110/48] via 160.10.37.4, 00:00:34, Serial0/1 O       160.10.37.1/32 [110/48] via 160.10.37.1, 00:00:34, Serial0/1 O IA    160.10.11.0/24 [110/58] via 160.10.37.1, 00:00:34, Serial0/1 O IA    160.10.15.0/24 [110/1610] via 160.10.32.3, 00:00:34, Serial0/0                        [110/1610] via 160.10.37.5, 00:00:34, Serial0/1 O       160.10.3.0/24 [110/49] via 160.10.32.3, 00:00:34, Serial0/0 O       160.10.1.0/24 [110/49] via 160.10.37.1, 00:00:34, Serial0/1 O IA    160.10.6.0/24 [110/50] via 160.10.32.3, 00:00:34, Serial0/0                       [110/50] via 160.10.37.5, 00:00:34, Serial0/1 O       160.10.4.0/24 [110/49] via 160.10.37.4, 00:00:34, Serial0/1 O       160.10.5.0/24 [110/49] via 160.10.37.5, 00:00:34, Serial0/1 O IA    160.10.25.0/24 [110/49] via 160.10.37.5, 00:00:35, Serial0/1 O IA    160.10.22.0/24 [110/49] via 160.10.32.3, 00:00:35, Serial0/0                        [110/49] via 160.10.37.5, 00:00:35, Serial0/1 R2# 

Example 4-22. OSPF Configuration: R3 Output

 R3#show run interface Loopback0  ip address 160.10.3.3 255.255.255.0  ip ospf network point-to-point ! interface FastEthernet0/0  ip address 160.10.22.3 255.255.255.0  duplex auto  speed auto ! interface Serial0/0  ip address 160.10.32.3 255.255.255.0  encapsulation frame-relay  ip ospf network point-to-point  ! interface BRI0/0  ip address 160.10.15.3 255.255.255.0  ip ospf demand-circuit  no peer neighbor-route  no cdp enable ! interface FastEthernet0/1  ip address 160.10.33.3 255.255.255.0  ! router ospf 1  log-adjacency-changes  area 1 virtual-link 160.10.2.2  network 160.10.3.0 0.0.0.255 area 1  network 160.10.15.0 0.0.0.255 area 22  network 160.10.22.0 0.0.0.255 area 22  network 160.10.32.0 0.0.0.255 area 1  network 160.10.33.0 0.0.0.255 area 33 ! ! R3#show ip route ospf      160.10.0.0/16 is variably subnetted, 16 subnets, 2 masks O       160.10.37.5/32 [110/112] via 160.10.32.2, 00:02:10, Serial0/0 O       160.10.37.4/32 [110/112] via 160.10.32.2, 00:02:10, Serial0/0 O       160.10.37.2/32 [110/64] via 160.10.32.2, 00:02:10, Serial0/0 O       160.10.37.1/32 [110/112] via 160.10.32.2, 00:02:10, Serial0/0 O IA    160.10.11.0/24 [110/122] via 160.10.32.2, 00:02:10, Serial0/0 O       160.10.2.0/24 [110/65] via 160.10.32.2, 00:02:10, Serial0/0 O       160.10.1.0/24 [110/113] via 160.10.32.2, 00:02:10, Serial0/0 O       160.10.6.0/24 [110/2] via 160.10.22.6, 18:45:16, FastEthernet0/0 O       160.10.4.0/24 [110/113] via 160.10.32.2, 00:02:10, Serial0/0 O       160.10.5.0/24 [110/113] via 160.10.32.2, 00:02:10, Serial0/0 O       160.10.25.0/24 [110/2] via 160.10.22.5, 18:45:16, FastEthernet0/0 R3# 

Example 4-23. OSPF Configuration: R4 Output

 R4#show run interface Loopback0  ip address 160.10.4.4 255.255.255.0  ip ospf network point-to-point ! interface Serial0/1  ip address 160.10.37.4 255.255.255.0  encapsulation frame-relay  ip ospf network point-to-multipoint  ! router ospf 1  log-adjacency-changes  network 160.10.4.0 0.0.0.255 area 0  network 160.10.37.0 0.0.0.255 area 0 ! ! R4#show ip route ospf      160.10.0.0/16 is variably subnetted, 16 subnets, 2 masks O       160.10.37.5/32 [110/112] via 160.10.37.2, 00:03:19, Serial0/1 O IA    160.10.32.0/24 [110/112] via 160.10.37.2, 00:03:19, Serial0/1 O IA    160.10.33.0/24 [110/113] via 160.10.37.2, 00:03:19, Serial0/1 O       160.10.37.2/32 [110/64] via 160.10.37.2, 00:03:19, Serial0/1 O       160.10.37.1/32 [110/112] via 160.10.37.2, 00:03:19, Serial0/1 O IA    160.10.11.0/24 [110/122] via 160.10.37.2, 00:03:19, Serial0/1 O IA    160.10.15.0/24 [110/1674] via 160.10.37.2, 00:03:19, Serial0/1 O       160.10.2.0/24 [110/65] via 160.10.37.2, 00:03:19, Serial0/1 O IA    160.10.3.0/24 [110/113] via 160.10.37.2, 00:03:19, Serial0/1 O       160.10.1.0/24 [110/113] via 160.10.37.2, 00:03:19, Serial0/1 O IA    160.10.6.0/24 [110/114] via 160.10.37.2, 00:03:19, Serial0/1 O       160.10.5.0/24 [110/113] via 160.10.37.2, 00:03:19, Serial0/1 O IA    160.10.25.0/24 [110/113] via 160.10.37.2, 00:03:19, Serial0/1 O IA    160.10.22.0/24 [110/113] via 160.10.37.2, 00:03:20, Serial0/1 R4# 

Example 4-24. OSPF Configuration: R5 Output

 R5#show run interface Loopback0  ip address 160.10.5.5 255.255.255.0  ip ospf network point-to-point ! interface FastEthernet0/0  ip address 160.10.22.5 255.255.255.0  duplex auto  speed auto ! interface BRI0/0  ip address 160.10.15.5 255.255.255.0  encapsulation ppp  ip ospf demand-circuit  no peer neighbor-route  no cdp enable  ppp authentication chap ! interface FastEthernet0/1  ip address 160.10.25.5 255.255.255.0  duplex auto  speed auto ! interface Serial0/1  ip address 160.10.37.5 255.255.255.0  encapsulation frame-relay  ip ospf network point-to-multipoint  ! router ospf 1  log-adjacency-changes  network 160.10.5.0 0.0.0.255 area 22  network 160.10.15.0 0.0.0.255 area 22  network 160.10.22.0 0.0.0.255 area 22  network 160.10.25.0 0.0.0.255 area 22  network 160.10.37.0 0.0.0.255 area 0 ! ! R5#show ip route ospf      160.10.0.0/16 is variably subnetted, 16 subnets, 2 masks O IA    160.10.32.0/24 [110/112] via 160.10.37.2, 00:04:11, Serial0/1 O IA    160.10.33.0/24 [110/113] via 160.10.37.2, 00:04:11, Serial0/1 O       160.10.37.4/32 [110/112] via 160.10.37.2, 00:04:11, Serial0/1 O       160.10.37.2/32 [110/64] via 160.10.37.2, 00:04:11, Serial0/1 O       160.10.37.1/32 [110/112] via 160.10.37.2, 00:04:11, Serial0/1 O IA    160.10.11.0/24 [110/122] via 160.10.37.2, 00:04:11, Serial0/1 O       160.10.2.0/24 [110/65] via 160.10.37.2, 00:04:11, Serial0/1 O IA    160.10.3.0/24 [110/113] via 160.10.37.2, 00:04:11, Serial0/1 O       160.10.1.0/24 [110/113] via 160.10.37.2, 00:04:11, Serial0/1 O       160.10.6.0/24 [110/2] via 160.10.22.6, 18:47:14, FastEthernet0/0 O       160.10.4.0/24 [110/113] via 160.10.37.2, 00:04:11, Serial0/1 R5 

Example 4-25. OSPF Configuration: R6 Output

 R6#show run interface Loopback0  ip address 160.10.6.6 255.255.255.0  ip ospf network point-to-point ! interface Ethernet0/0  ip address 160.10.22.6 255.255.255.0  half-duplex ! router ospf 1  log-adjacency-changes  network 160.10.6.0 0.0.0.255 area 22  network 160.10.22.0 0.0.0.255 area 22 ! ! R6#show ip route ospf      160.10.0.0/16 is variably subnetted, 16 subnets, 2 masks O IA    160.10.37.5/32 [110/10] via 160.10.22.5, 18:48:33, Ethernet0/0 O IA    160.10.32.0/24 [110/74] via 160.10.22.3, 18:48:33, Ethernet0/0 O IA    160.10.37.4/32 [110/122] via 160.10.22.3, 18:48:33, Ethernet0/0                        [110/122] via 160.10.22.5, 18:48:33, Ethernet0/0 O IA    160.10.33.0/24 [110/11] via 160.10.22.3, 18:48:33, Ethernet0/0 O IA    160.10.37.2/32 [110/74] via 160.10.22.3, 18:48:33, Ethernet0/0                        [110/74] via 160.10.22.5, 18:48:33, Ethernet0/0 O IA    160.10.37.1/32 [110/11] via 160.10.22.5, 18:48:33, Ethernet0/0 O IA    160.10.11.0/24 [110/21] via 160.10.22.5, 18:48:33, Ethernet0/0 O       160.10.15.0/24 [110/1572] via 160.10.22.3, 18:48:53, Ethernet0/0                        [110/1572] via 160.10.22.5, 18:48:53, Ethernet0/0 O IA    160.10.2.0/24 [110/75] via 160.10.22.3, 18:48:35, Ethernet0/0                       [110/75] via 160.10.22.5, 18:48:35, Ethernet0/0 O IA    160.10.3.0/24 [110/11] via 160.10.22.3, 18:48:35, Ethernet0/0 O IA    160.10.1.0/24 [110/12] via 160.10.22.5, 18:48:35, Ethernet0/0 O IA    160.10.4.0/24 [110/123] via 160.10.22.3, 18:48:35, Ethernet0/0                       [110/123] via 160.10.22.5, 18:48:35, Ethernet0/0 O IA    160.10.5.0/24 [110/11] via 160.10.22.5, 18:48:34, Ethernet0/0 O       160.10.25.0/24 [110/11] via 160.10.22.5, 18:48:55, Ethernet0/0 R6# 

Section 2.2: EIGRP (10 Points)

• Configure EIGRP between R2 and BB1. R2-fa0/0 must be the only interface configured for EIGRP on R2. R2 routing table should be populated with EIGRP routes from BB1.

If you configured this correctly as shown in Example 4-26, you have scored 4 points.

• Configure the routing waiting time for EIGRP on R2 to remain active indefinitely.

If you configured this correctly as shown in Example 4-26, you have scored 3 points.

• Redistribute EIGRP into OSPF. Make sure all routers have the EIGRP routes in their routing tables.

If you configured this correctly as shown in Example 4-26, you have scored 3 points.

This is a basic setup to have R2 receiving EIGRP routes from BB1. We begin here the concept of using features that are very important areas you need to explore. The redistribution into OSPF will be done only in one way. It is important to notice during the redistribution into OSPF that you use the subnets command to allow networks that are "subnetted" to be redistributed into OSPF.

The timers active-time disable command accommodates the requirement of the waiting time be set up to "indefinitely."

Example 4-26. EIGRP Configuration: R2 Output and R6 OSPF Routing Table Verification

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 R2#sh run | b router eigrp router eigrp 400  timers active-time disabled  passive-interface default  no passive-interface FastEthernet0/0  network 130.200.10.0 0.0.0.255  no auto-summary  no eigrp log-neighbor-changes ! ! router ospf 1  redistribute eigrp 400 metric 100 subnets ! R2#show ip route eigrp      50.0.0.0/24 is subnetted, 1 subnets D       50.5.5.0 [90/156160] via 130.200.10.200, 00:12:53, FastEthernet0/0 D    193.118.9.0/24 [90/156160] via 130.200.10.200, 00:12:53, FastEthernet0/0 D    193.118.8.0/24 [90/156160] via 130.200.10.200, 00:12:53, FastEthernet0/0 D    193.118.10.0/24 [90/156160] via 130.200.10.200, 00:12:53, FastEthernet0/0 D    193.118.5.0/24 [90/156160] via 130.200.10.200, 00:12:53, FastEthernet0/0 D    193.118.4.0/24 [90/156160] via 130.200.10.200, 00:12:53, FastEthernet0/0 D    193.118.7.0/24 [90/156160] via 130.200.10.200, 00:12:53, FastEthernet0/0      40.0.0.0/24 is subnetted, 1 subnets D       40.4.4.0 [90/156160] via 130.200.10.200, 00:12:53, FastEthernet0/0 D    193.118.6.0/24 [90/156160] via 130.200.10.200, 00:12:53, FastEthernet0/0 D    193.118.1.0/24 [90/156160] via 130.200.10.200, 00:12:53, FastEthernet0/0 D    193.118.3.0/24 [90/156160] via 130.200.10.200, 00:12:53, FastEthernet0/0 D    193.118.2.0/24 [90/156160] via 130.200.10.200, 00:12:53, FastEthernet0/0 R2# ! ! ! R6 routing table has the EIGRP routes showing as OSPF external. Notice the "E2" that  means OSPF external routes. ________________________________________________________________ R6#show ip route ospf | include E2 O E2    50.5.5.0 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2    140.200.10.0 [110/1] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2 193.118.9.0/24 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2 20.0.0.0/8 [110/1] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2 193.118.8.0/24 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2 193.118.10.0/24 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2 193.118.5.0/24 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2 193.118.4.0/24 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2 193.118.7.0/24 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2    40.4.4.0 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2    130.200.10.0 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2 193.118.6.0/24 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2 193.118.1.0/24 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2 193.118.3.0/24 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 O E2 193.118.2.0/24 [110/100] via 160.10.22.3, 23:30:52, Ethernet0/0 R6#show ip route ospf      50.0.0.0/24 is subnetted, 1 subnets O E2    50.5.5.0 [110/100] via 160.10.22.3, 00:00:42, Ethernet0/0                  [110/100] via 160.10.22.5, 00:00:42, Ethernet0/0 O E2 193.118.9.0/24 [110/100] via 160.10.22.3, 00:00:42, Ethernet0/0                     [110/100] via 160.10.22.5, 00:00:42, Ethernet0/0 O E2 193.118.8.0/24 [110/100] via 160.10.22.3, 00:00:42, Ethernet0/0                     [110/100] via 160.10.22.5, 00:00:42, Ethernet0/0 O E2 193.118.10.0/24 [110/100] via 160.10.22.3, 00:00:42, Ethernet0/0                      [110/100] via 160.10.22.5, 00:00:42, Ethernet0/0 O E2 193.118.5.0/24 [110/100] via 160.10.22.3, 00:00:42, Ethernet0/0                     [110/100] via 160.10.22.5, 00:00:42, Ethernet0/0 O E2 193.118.4.0/24 [110/100] via 160.10.22.3, 00:00:42, Ethernet0/0                     [110/100] via 160.10.22.5, 00:00:42, Ethernet0/0      160.10.0.0/16 is variably subnetted, 16 subnets, 2 masks O IA    160.10.37.5/32 [110/10] via 160.10.22.5, 18:54:46, Ethernet0/0 O IA    160.10.32.0/24 [110/74] via 160.10.22.3, 18:54:47, Ethernet0/0 O IA    160.10.37.4/32 [110/122] via 160.10.22.3, 18:54:47, Ethernet0/0                        [110/122] via 160.10.22.5, 18:54:47, Ethernet0/0 O IA    160.10.33.0/24 [110/11] via 160.10.22.3, 18:54:47, Ethernet0/0 O IA    160.10.37.2/32 [110/74] via 160.10.22.3, 18:54:47, Ethernet0/0                        [110/74] via 160.10.22.5, 18:54:47, Ethernet0/0 O IA    160.10.37.1/32 [110/11] via 160.10.22.5, 18:54:47, Ethernet0/0 O IA    160.10.11.0/24 [110/21] via 160.10.22.5, 18:54:47, Ethernet0/0 O       160.10.15.0/24 [110/1572] via 160.10.22.3, 18:55:08, Ethernet0/0                        [110/1572] via 160.10.22.5, 18:55:08, Ethernet0/0 O IA    160.10.2.0/24 [110/75] via 160.10.22.3, 18:54:48, Ethernet0/0                       [110/75] via 160.10.22.5, 18:54:48, Ethernet0/0 O IA    160.10.3.0/24 [110/11] via 160.10.22.3, 18:54:48, Ethernet0/0 O IA    160.10.1.0/24 [110/12] via 160.10.22.5, 18:54:48, Ethernet0/0 O IA    160.10.4.0/24 [110/123] via 160.10.22.3, 18:54:48, Ethernet0/0                       [110/123] via 160.10.22.5, 18:54:48, Ethernet0/0 O IA    160.10.5.0/24 [110/11] via 160.10.22.5, 18:54:48, Ethernet0/0 O       160.10.25.0/24 [110/11] via 160.10.22.5, 18:55:08, Ethernet0/0 O E2 193.118.7.0/24 [110/100] via 160.10.22.3, 00:00:44, Ethernet0/0                     [110/100] via 160.10.22.5, 00:00:44, Ethernet0/0      40.0.0.0/24 is subnetted, 1 subnets O E2    40.4.4.0 [110/100] via 160.10.22.3, 00:00:44, Ethernet0/0                  [110/100] via 160.10.22.5, 00:00:44, Ethernet0/0      130.200.0.0/24 is subnetted, 1 subnets O E2    130.200.10.0 [110/100] via 160.10.22.3, 00:00:46, Ethernet0/0                      [110/100] via 160.10.22.5, 00:00:46, Ethernet0/0 O E2 193.118.6.0/24 [110/100] via 160.10.22.3, 00:00:46, Ethernet0/0                     [110/100] via 160.10.22.5, 00:00:46, Ethernet0/0 O E2 193.118.1.0/24 [110/100] via 160.10.22.3, 00:00:46, Ethernet0/0                     [110/100] via 160.10.22.5, 00:00:46, Ethernet0/0 O E2 193.118.3.0/24 [110/100] via 160.10.22.3, 00:00:46, Ethernet0/0                     [110/100] via 160.10.22.5, 00:00:46, Ethernet0/0 O E2 193.118.2.0/24 [110/100] via 160.10.22.3, 00:00:48, Ethernet0/0                     [110/100] via 160.10.22.5, 00:00:48, Ethernet0/0 R6# 

Section 2.3: RIP (9 Points)

• Configure RIP between R4 and BB2. R4-e0/0 must be the only interface configured for RIP on R4. You should receive updates and R4 routing table will be populated with some RIP routes from BB2.

If you configured this correctly as shown in Example 4-27, you have scored 4 points.

• Configure a filter that will allow only networks 20.0.0.0/8 to be accepted on R4 from BB2.

If you configured this correctly as shown in Example 4-27, you have scored 2 points.

• Redistribute between RIP and OSPF. Make sure all others routers have network 20.0.0.0 in their routing tables.

If you configured this correctly as shown in Example 4-27, you have scored 3 points.

RIP V.2 is running on BB2 and advertising routes to R4. A basic filter and redistribution into OSPF is used to accomplish this task. Note the RIP configuration in Example 4-27 that and what is relevant to look at.

Example 4-27. R4 Output RIP Configuration and R6 Routing Table Verification

 R4#sh run | b router rip router rip  version 2  network 140.200.0.0  distribute-list 1 in Ethernet0/0  no auto-summary ! ! R4#sh run | b router ospf router ospf 1  log-adjacency-changes  redistribute rip metric 1 subnets ! R4#sh ip access-lists 1 Standard IP access list 1     permit 20.0.0.0, wildcard bits 0.0.0.255 (39660 matches) R4# ! ! R4 RIP Routing table before filter: R4#show ip route rip R    196.1.8.0/24 [120/1] via 140.200.10.200, 00:00:00, Ethernet0/0 R    196.1.9.0/24 [120/1] via 140.200.10.200, 00:00:00, Ethernet0/0 R    196.1.10.0/24 [120/1] via 140.200.10.200, 00:00:00, Ethernet0/0 R    20.0.0.0/8 [120/1] via 140.200.10.200, 00:00:00, Ethernet0/0 R    196.1.1.0/24 [120/1] via 140.200.10.200, 00:00:00, Ethernet0/0 R    196.1.2.0/24 [120/1] via 140.200.10.200, 00:00:00, Ethernet0/0 R    196.1.3.0/24 [120/1] via 140.200.10.200, 00:00:00, Ethernet0/0 R    196.1.4.0/24 [120/1] via 140.200.10.200, 00:00:00, Ethernet0/0 R    196.1.5.0/24 [120/1] via 140.200.10.200, 00:00:00, Ethernet0/0 R    196.1.6.0/24 [120/1] via 140.200.10.200, 00:00:00, Ethernet0/0 R    196.1.7.0/24 [120/1] via 140.200.10.200, 00:00:00, Ethernet0/0 R    30.0.0.0/8 [120/1] via 140.200.10.200, 00:00:00, Ethernet0/0 R4# ! ! R6 has not the 20.0.0.0 network on its Routing table: R6#show ip route | include 20.0.0 ! No output here R6# ! ! R4 RIP Routing table after filter be comfigured: R4# R4#show ip route rip R    20.0.0.0/8 [120/1] via 140.200.10.200, 00:00:22, Ethernet0/0 R4# ! ! ! R6 OSPF Routing table has also RIP network 20.0.0.0/24: R6#show ip route | include 20.0.0 O E2 20.0.0.0/8 [110/1] via 160.10.22.3, 23:47:18, Ethernet0/0