cisco ccna virtual lab

cisco ccna virtual lab.After all LSAs are assembled, each router stores them into a database called the Link State Database (LSDB).For this example, R1 will receive LSAs from R2 and R3 with the same content, and the LSA from R3 will be discarded because there is already an LSA in R1's R1LSDB that was advertised by R2. After the flooding process is complete, each router should have a complete network topology.At this point, the router can execute the SPF algorithm to compute the best path to each destination network. Once the calculation is complete, the router adds the results to the routing table. If a link fails, the router that detects the failure sends out another route update message and performs LSA flooding. Each router receives a new LSA, updates the LSDB with the information contained in it, recalculates the best path to each destination network, and adjusts the routing table accordingly.The advantages of the link-state algorithm are shown below.The router will use a better method to calculate the cost of forwarding the packet to the destination network.The routing protocol itself has lower overhead than the DV algorithm because it is no longer necessary to transmit the complete routing table when updating routing information.The best path is calculated much better than the DV algorithm because each router is aware of the complete network topology.Can completely eliminate routing loops.4. Enable multiple routing protocols simultaneouslyEach unit can run multiple routing protocols in its own network. For example, it is possible to set up both a static route