View the application of the RIP Routing Protocol in practice

The RIP routing protocol is mainly a routed-based program. At the same time, routed runs on Unix systems. When the RIP routing protocol is enabled on the network, the network has a powerful function to automatically update the route table. However, some major internal gateway protocols, such as RIP/RIP2, OSPF, or IGRP/OSPF, have certain protocols.

The Internal Gateway Protocol is applicable to scenarios where only one Administrator is responsible for network operations and operations. Otherwise, a configuration error may cause network performance degradation or unstable network operation. For networks shared by many administrators, such as the Internet, consider using EGP InteriorGatewayProtocol, external gateway protocol), such as BGP4.

If there is only one vro in the network, there is no need to use the RIP routing protocol. It is necessary to share information only when there are multiple vrouters in the network. However, if you only have a small network, you can use static routes to manually update the route table.

Routing Information Protocol

RIPRoutingInformationProtocol) is based on a program called "routed". The program runs on a BSDI Unix system and is standardized in RFC1058 in 1988. In version 2 described in RFC1388, support for VLSMVariableLengthSubnetMasks and variable-length subnet shielding are added, but this does not make up for the main defects of the RIP routing protocol. For example, in a network with multiple paths to the same destination, it takes a lot of time for RIP to determine a selectable path. In a network without multiple paths, the RIP routing protocol has been widely used.

The RIP routing protocol is listed as the distance vector protocol, which means that distance is used to determine the optimal path, as measured by the number of Route hops. The router sends broadcast information to each other every 30 seconds. Each vro that receives the broadcast information adds a hop count. If the broadcast information is received by multiple routers, the path with the lowest hop count on the router is the selected path. If the preferred path does not work properly, the path with a higher hop count will be used as a backup.

For the RIP and other routing protocols), the router on the network must go through the process of deciding the alternative path when a path is unavailable. This process is called Convergence ). It is a major problem that the RIP routing protocol spends a lot of time on convergence. Before the RIP routing protocol realizes that the path cannot be reached, it is set to wait until it has missed 6 updates for a total of 180 seconds. Then, before using the new path to update the route table, it waits for the next information of another feasible path to arrive. This means that it takes at least three minutes before the backup path is used, which is a long time for most applications to time out.