ccna 200 301 syllabus design slideshare ppt

ccna 200 301 syllabus design slideshare ppt.Perform a similar configuration on R2 and R3. After both are configured, wait a few moments and the router will indicate that R1's adjacency with R2 and R3 has been established. Then check the routing table of R1, which shows the following: rl#show ip route 1.0.0.0/24 is subnetted, 1 subnets1.1.1.0 is directlyconnected, LoopbackO 2.0.0.0/8 is variably subnetted, 2subnets, 2 masks 2.2.2.2/32 [110/65] via 12.1.1.2, 00:01:40, Seriall/1 2.2.2.0/24 [120/1] via 12.1.1.2, 00:00:03, Seriall/1 3.0.0.0/8 is variably subnetted, 2 subnetsz2 masks3.3.3.3/32 [110/2] via 13.1.1.3, 00:01:40, FastEthernet0/0 3.3.3.0/24 [120/1] via 13,1.1.3, 00:00:15, FastEthernet0/0 23.0.0.0/24 is subnetted, 1 subnets 23.1.1,0 [110/65] via 13.1.1.3, 00:01:40, FastEthernet0/0 12.0.0.0/24 is subnetted, 1 subnetsis directly connected, FastEthernet0/00From the above loss, you can find that R1 has two RIP routes and three OSPF routes in its routing table. In the routing table of R1Why are there such routes, and is it possible that the routing table contains all the route entries learned from both RIP and OSPF? The answer is no. Before OSPF was configured, there were three RIP routes on R1, and if they did not affect each other, there should still be three RIP routes on R1 now, but why did they become two? If we compare, we find that the route "R23.1.1.0/24" is missing. This is because R1 learned the route 23.1.1.0/24 through RIP, through OSPF also learned the route 23.1.1.0/24, routing table to save only the best route, the same 23.1 0/24 route, the management distance of the small route (OSPF management distance is 110) more trusted, was put into the routing table, the management distance of the large RIP route ( The RIP route ( RIP administrative distance is 120) in the routing table does not show. The reader wonders at this point why then two R1P routes still exist. If you look closely, the loopback interface that R1 learns from R2 through OSPF is the 32-bit host route 2.222/32, while the one learned through RIPv2 is 222.0/24, with a different mask length, which are two different routes that are both put into the routing table.Here is the question, if R1 wants to go to 2.222, does R1 choose the OSPF route or the RIP route? Probably all readers will be able to answer correctly and choose the OSPF route. Why choose OSPF routing? Some readers may answer that because OSPF has a smaller administrative distance. Yes, OSPF has a smaller administrative distance, but the reason for choosing OSPF routes here is not because of the administrative distance, but because of the subnet mask length, which can match 32 bits while RIP can only match 24 bits. The reader may wish to recall the principles of route selection at this point: first, longest match first; second, small administrative distance first; and third, small metric value first. If R1 is asked to go to 2.2.2.3, does R1 choose a RIP route or an OSPF route? The choice at this point would be the RIP route, because the OSPF route does not match.Use the "ip ospfnetwork point-to-point" command on R1 to change the network type of the R1 loopback interface, the command is as followsR1(config)#int lo0R1(config-if)#ip ospf networkpoint-to-point