Lab 21: OSPF Filtering & Summarization

Task

Topology

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.

Solution

Task 2: Configure OSPF According to the topology and provide Router-ID as Router Name (like 1.1.1.1 for R1).


On 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


On 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


On 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


On 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

On 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

On 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


On 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


On 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


On 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


On 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

On 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

On 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.

On R4
=====

router ospf 1
 area 87 virtual-link 8.8.8.8


On R8
=====

router ospf 1
 area 87 virtual-link 4.4.4.4


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

On 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. 

On R3
=====

router ospf 1
 area 40 stub no-summary
 exit

On R7
=====

router ospf 1
 area 40 stub
 exit

On R11
======

router ospf 1
 area 40 stub
 exit

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

On 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.

On 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.

On 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.

On 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.

On R1
=====

router ospf 1
 summary-address 100.100.3.0 255.255.255.0 not-advertise
 exit