BSCI lab

catalinucatalinu Member Posts: 14 ■□□□□□□□□□
Hi,

ON r1,r2,r3 running both rip and ospf, all networks are advertised.

172.16.0.0/24 is subnetted, 6 subnets
O 172.16.23.0 [1/2] via 172.16.12.2, 00:30:37, FastEthernet0/0
C 172.16.12.0 is directly connected, FastEthernet0/0
C 172.16.13.0 is directly connected, Serial1/0
C 172.16.1.0 is directly connected, Loopback1
O 172.16.2.0 [1/2] via 172.16.12.2, 00:30:37, FastEthernet0/0
O 172.16.3.0 [1/3] via 172.16.12.2, 00:30:37, FastEthernet0/0
O 192.168.102.0/24 [1/2] via 172.16.12.2, 00:30:37, FastEthernet0/0
O 192.168.103.0/24 [1/3] via 172.16.12.2, 00:30:37, FastEthernet0/0
C 192.168.101.0/24 is directly connected, Loopback101
r1#

r1 fa0/0 ->R2

172.16.0.0/24 is subnetted, 6 subnets
C 172.16.23.0 is directly connected, FastEthernet0/0
C 172.16.12.0 is directly connected, FastEthernet1/0
O 172.16.13.0 [1/65] via 172.16.23.3, 00:30:58, FastEthernet0/0
[1/65] via 172.16.12.1, 00:30:58, FastEthernet1/0
O 172.16.1.0 [1/2] via 172.16.12.1, 00:30:58, FastEthernet1/0
C 172.16.2.0 is directly connected, Loopback2
O 172.16.3.0 [1/2] via 172.16.23.3, 00:30:58, FastEthernet0/0
C 192.168.102.0/24 is directly connected, Loopback102
O 192.168.103.0/24 [1/2] via 172.16.23.3, 00:30:58, FastEthernet0/0
O 192.168.101.0/24 [1/2] via 172.16.12.1, 00:30:58, FastEthernet1/0

R2 fa0/0 -> R3

Attempt this exercise based on what you know about OSPF, Dijkstra’s algorithm, and the distance command. Using only the distance command, write out the commands necessary to confuse the routers in this topology so that packets destined for 172.16.3.1 would continually bounce between R1 to R2?

This is a Q from bsci curriculum in lab_5_4.
I have tried to make AD on R1, R2 for rip and ospf =1 and 255 but i still can't create a loop between R1 and R2..

Any thoughts ?

Since it is possible to intentionally break routing in this way, what degree of caution should be exercised when manipulating administrative distances in a production network?
cisco rocks

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