What are the connection status routing protocols?

How many kinds of connection status routing protocols are used on routers? For example, CCIE routing direction? When can I use multiple protocols? Multi-route protocol is required when two different routing protocols need to exchange route information. Of course, route redistribution can also exchange route information. In the following cases, you do not need to use the multi-route Protocol: (1) upgrade from the old version of the Internal Gateway Protocol (I g p) to the new version of the I G P. Www.2cto.com (2) You want to use another routing protocol, but you must retain the original protocol. (3) You want to terminate the internal route to avoid interference from other routers without strict filtering and supervision functions. (4) You are in an environment composed of routers from multiple manufacturers. Next, let's take a look at what is the distance vector routing protocol? The distance vector routing protocol is designed for small network environments. In a large network environment, such protocols will generate large traffic when learning routes and maintaining routes, occupying excessive bandwidth. If the route selection table update is not received from the adjacent site within 9 0 seconds, the adjacent site is considered inaccessible. Every 30 seconds, the distance vector routing protocol sends the entire route selection table to the adjacent site to update the route selection table of the adjacent site. In this way, it can collect a list of networks from other sites (directly connected or connected in other ways) for route selection. Distance Vector Routing uses the number of hops as the metric value to calculate the number of routers that need to pass to the destination. For example, r I p uses the B e l m a n-F o r d algorithm to determine the shortest path, that is, the line that can reach the destination as long as it passes through the smallest hop count. The maximum number of hops allowed is usually set to 1 5. Terminals that must pass through more than five vrouters are considered inaccessible. Distance Vector routing protocols include ip rip, ipx rip, A p l e Talk rt m p, And I G R P. Www.2cto.com, then let's look at what is the link status routing protocol? The link status routing protocol is more suitable for large networks. However, due to its complexity, the router needs to occupy more c p u resources. It can detect broken links or new routers in a shorter period of time, so that the convergence time of the Protocol is shorter than that of the Distance Vector routing protocol. Generally, if you do not receive the ccna Examination Report from the neighboring station within 10 seconds, the neighboring station is considered inaccessible. A connection status router sends an update message to its neighbor to notify it of all the links it knows. It determines that the measurement value of the optimal path is a numerical cost, which is generally determined by the bandwidth of the link. Links with the minimum cost are considered optimal. In the Shortest Path priority algorithm, the maximum possible cost is almost unlimited. If the network does not change, the router only needs to periodically refresh the route selection table that has not been updated. (The cycle duration can be from 3 0 minutes to 2 hours, cisco ccie training) connection status routing protocols include ip ospf, ipx nlsp, And I s-I S. Is there a problem here that a router can use both the distance vector routing protocol and the link status routing protocol? The answer is yes. Each interface can be configured to use different routing protocols, but they must be able to exchange routing information through the redistribution routing.