3.6.g Implement troubleshoot and optimize OSPF convergence and scalability

3.6.g [iii] LSA propagation control [area types, ISPF]

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ospf_7to5_nssa

that link above will download the below topology with only ip addressing in place…

ospf_7to5_nssa

put rip v2 on r1 and r2’s connected interfaces:

R1(config-router)#do sh run | sec rip
router rip
version 2
network 0.0.0.0
no auto-summary

R2(config-router)#do sh ip route rip | b Gate
Gateway of last resort is not set

1.0.0.0/24 is subnetted, 1 subnets
R        1.1.1.0 [120/1] via 192.168.12.1, 00:00:19, FastEthernet0/0

configure the ospf networks or interfaces for the areas according to the diagram…

prove the veracity of the ospf domain:

R3(config-router)#do sh ip route ospf | b Gate
Gateway of last resort is not set

2.0.0.0/32 is subnetted, 1 subnets
O        2.2.2.2 [110/2] via 192.168.23.2, 00:04:03, FastEthernet0/1
4.0.0.0/32 is subnetted, 1 subnets
O        4.4.4.4 [110/2] via 192.168.34.4, 00:02:43, FastEthernet0/0
5.0.0.0/32 is subnetted, 1 subnets
O IA     5.5.5.5 [110/3] via 192.168.34.4, 00:01:15, FastEthernet0/0
O IA  192.168.45.0/24 [110/2] via 192.168.34.4, 00:02:26, FastEthernet0/0

foreach address {
2.2.2.2
3.3.3.3
4.4.4.4
5.5.5.5
192.168.23.2
192.168.23.3
192.168.34.3
192.168.34.4
192.168.45.4
192.168.45.5
} { ping $address }

do mutual redistribution on both ends of the network, ie. rip into ospf, ospf int eigrp, etc.

R2(config-router)#do sh run | i redistr
redistribute rip subnets
redistribute ospf 1 metric 6

R5(config-router)#do sh run | i redistr
redistribute ospf 1 metric 1 1 255 255 1500
redistribute eigrp 1 subnets

R6(config-router)#do sh ip route eigrp | b Gate
Gateway of last resort is not set

1.0.0.0/24 is subnetted, 1 subnets
D EX     1.1.1.0 [170/2560002816] via 192.168.56.5, 00:01:33, FastEthernet0/0
2.0.0.0/32 is subnetted, 1 subnets
D EX     2.2.2.2 [170/2560002816] via 192.168.56.5, 00:01:33, FastEthernet0/0
3.0.0.0/32 is subnetted, 1 subnets
D EX     3.3.3.3 [170/2560002816] via 192.168.56.5, 00:01:33, FastEthernet0/0
4.0.0.0/32 is subnetted, 1 subnets
D EX     4.4.4.4 [170/2560002816] via 192.168.56.5, 00:01:33, FastEthernet0/0
5.0.0.0/24 is subnetted, 1 subnets
D EX     5.5.5.0 [170/2560002816] via 192.168.56.5, 00:01:33, FastEthernet0/0
D EX  192.168.12.0/24
[170/2560002816] via 192.168.56.5, 00:01:33, FastEthernet0/0
D EX  192.168.23.0/24
[170/2560002816] via 192.168.56.5, 00:01:33, FastEthernet0/0
D EX  192.168.34.0/24
[170/2560002816] via 192.168.56.5, 00:01:33, FastEthernet0/0
D EX  192.168.45.0/24
[170/2560002816] via 192.168.56.5, 00:01:33, FastEthernet0/0

R1(config-router)#do sh ip route rip | b Gate
Gateway of last resort is not set

2.0.0.0/24 is subnetted, 1 subnets
R        2.2.2.0 [120/6] via 192.168.12.2, 00:00:06, FastEthernet0/0
3.0.0.0/32 is subnetted, 1 subnets
R        3.3.3.3 [120/6] via 192.168.12.2, 00:00:06, FastEthernet0/0
4.0.0.0/32 is subnetted, 1 subnets
R        4.4.4.4 [120/6] via 192.168.12.2, 00:00:06, FastEthernet0/0
5.0.0.0/32 is subnetted, 1 subnets
R        5.5.5.5 [120/6] via 192.168.12.2, 00:00:06, FastEthernet0/0
6.0.0.0/24 is subnetted, 1 subnets
R        6.6.6.0 [120/6] via 192.168.12.2, 00:00:06, FastEthernet0/0
R     192.168.23.0/24 [120/6] via 192.168.12.2, 00:00:06, FastEthernet0/0
R     192.168.34.0/24 [120/6] via 192.168.12.2, 00:00:06, FastEthernet0/0
R     192.168.45.0/24 [120/6] via 192.168.12.2, 00:00:06, FastEthernet0/0
R     192.168.56.0/24 [120/6] via 192.168.12.2, 00:00:06, FastEthernet0/0

note all the routes end to end…

R1(config-router)#do ping 6.6.6.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 6.6.6.6, timeout is 2 seconds:
!!!!!

make router 4 the nssa abr and router 5 the nssa asbr for area1…

R5(config-router)#area 1 nssa
R5(config-router)#
*Apr 18 16:21:46.351: %OSPF-5-ADJCHG: Process 1, Nbr 4.4.4.4 on FastEthernet0/1 from FULL to DOWN, Neighbor Down: Adjacency forced to reset
R5(config-router)#
*Apr 18 16:21:49.927: %OSPF-5-ADJCHG: Process 1, Nbr 4.4.4.4 on FastEthernet0/1 from LOADING to FULL, Loading Done