nxll21 ospf filtering & summarization

Lab 21: OSPF Filtering & Summarization

Task

1. Configure IP Address as per given in topology.

2. Configure OSPF According to the topology and provide Router-ID as Router Name (like 1.1.1.1 for

R1).

3. Communicate OSPF Area 100 to OSPF Area 0.

4. Make sure R1 not received R12 loopback. Do possible Configuration.

5. Make sure OSPF Area 40 using Totally Stub for LSA Filtering.

6. Make sure R12 not received R10 loopback. Use prefix list for this task.

7. Area 10 not received R7 loopback. Use filter list to complete this task.

8. Make sure R1 Redistribute EIGRP as External type 1.

9. OSPF Area 100 send R12 loopback using manual summarization.

10. Make sure R1 loopback 3 is not advertise in OSPF domain.

Figure 1 Topology


Solution

Task 2: Configure OSPF According to the topology and provide Router-ID as Router Name (like

1.1.1.1 for R1).

R1

router ospf 1

router-id 1.1.1.1

network 24.45.99.0 0.0.0.255 area 0

network 25.0.0.0 0.0.0.255 area 0

network 158.52.64.0 0.0.0.255 area 0

R2

router ospf 1

router-id 2.2.2.2

network 15.24.0.0 0.0.0.255 area 10

network 25.0.0.0 0.0.0.255 area 0

network 84.122.34.0 0.0.0.255 area 0

network 99.54.66.0 0.0.0.255 area 0

network 199.50.200.0 0.0.0.255 area 10

R3

router ospf 1

network 25.0.0.0 0.0.0.255 area 0

network 74.175.65.0 0.0.0.255 area 40

network 84.122.34.0 0.0.0.255 area 0

network 158.52.64.0 0.0.0.255 area 0

R4

router ospf 1

router-id 4.4.4.4

network 24.45.99.0 0.0.0.255 area 0

network 25.0.0.0 0.0.0.255 area 0

network 99.54.66.0 0.0.0.255 area 0

network 100.0.0.0 0.0.0.255 area 87


R5

router ospf 1

router-id 5.5.5.5

network 145.33.54.0 0.0.0.255 area 10

network 199.50.200.0 0.0.0.255 area 10

R6

router ospf 1

router-id 6.6.6.6

network 15.24.0.0 0.0.0.255 area 10

network 33.42.21.0 0.0.0.255 area 10

R7

router ospf 1

router-id 7.7.7.7

network 7.7.1.1 0.0.0.0 area 40

network 7.7.2.1 0.0.0.0 area 40

network 7.7.3.1 0.0.0.0 area 40

network 7.7.4.1 0.0.0.0 area 40

network 74.175.65.0 0.0.0.255 area 40

R8

router ospf 1

router-id 8.8.8.8

area 100 range 12.12.0.0 255.255.248.0

network 100.0.0.0 0.0.0.255 area 87

network 201.114.25.0 0.0.0.255 area 100

R9

router ospf 1

router-id 9.9.9.9

network 9.9.1.1 0.0.0.0 area 10

network 9.9.2.1 0.0.0.0 area 10

network 9.9.3.1 0.0.0.0 area 10

network 9.9.4.1 0.0.0.0 area 10

network 145.33.54.0 0.0.0.255 area 10


R10

router ospf 1

router-id 10.10.10.10

network 10.10.1.0 0.0.0.255 area 10

network 10.10.2.0 0.0.0.255 area 10

network 10.10.3.0 0.0.0.255 area 10

network 10.10.4.0 0.0.0.255 area 10

network 33.42.21.0 0.0.0.255 area 10

R11

router ospf 1

router-id 11.11.11.11

network 11.11.11.1 0.0.0.0 area 40

network 11.11.12.1 0.0.0.0 area 40

network 11.11.13.1 0.0.0.0 area 40

network 11.11.14.1 0.0.0.0 area 40

network 74.175.65.0 0.0.0.255 area 40

R12

router ospf 1

router-id 12.12.12.12

network 12.12.1.1 0.0.0.0 area 100

network 12.12.2.1 0.0.0.0 area 100

network 12.12.3.1 0.0.0.0 area 100

network 12.12.4.1 0.0.0.0 area 100

network 201.114.25.0 0.0.0.255 area 100

Task 3: Communicate OSPF Area 100 to OSPF Area 0.

R4

router ospf 1

area 87 virtual-link 8.8.8.8

R8

router ospf 1

area 87 virtual-link 4.4.4.4


Task 4: Make sure R1 not received R12 loopback. Do possible Configuration.

R1

access-list 10 deny 12.12.1.0 0.0.0.255

access-list 10 deny 12.12.2.0 0.0.0.255

access-list 10 deny 12.12.3.0 0.0.0.255

access-list 10 deny 12.12.4.0 0.0.0.255

access-list 10 permit any

router ospf 1

distribute-list 10 in FastEthernet0/0

exit

Task 5: Make sure OSPF Area 40 using Totally Stub for LSA Filtering.

R3

router ospf 1

area 40 stub no-summary

exit

R7

router ospf 1

area 40 stub

exit

R11

router ospf 1

area 40 stub

exit

Task 6: Make sure R12 not received R10 loopback. Use prefix list for this task.

R12

ip prefix-list R10loop seq 5 deny 10.10.0.0/16 ge 24 le 24

ip prefix-list R10loop seq 10 permit 0.0.0.0/0 le 32

router ospf 1

distribute-list prefix R10loop in FastEthernet0/0

exit


Task 7: Area 10 not received R7 loopback. Use filter list to complete this task.

R2

ip prefix-list R7loop seq 5 deny 7.7.0.0/16 ge 24 le 24

ip prefix-list R7loop seq 10 permit 0.0.0.0/0 le 32

router ospf 1

area 10 filter-list prefix R7loop in

exit

Task 8: Make sure R1 Redistribute Eigrp as External type 1.

R1

router ospf 1

redistribute eigrp 100 metric 1 metric-type 1 subnets

exit

Task 9: OSPF Area 100 send R12 loopback using manual summarization.

R8

router ospf 1

area 100 range 12.12.0.0 255.255.248.0

exit

Task 10: Make sure R1 loopback 3 is not advertise in ospf domain.

R1

router ospf 1

summary-address 100.100.3.0 255.255.255.0 not-advertise

exit

nxll21 ospf filtering & summarization

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