The Routing Information Protocol (RIP) is a distance vector protocol with a hop as a metric. RIP is widely used in the global Internet, which is an internal gateway protocol (Interior Gateway Protocol), which performs routing function within the autonomous system. Exterior Gateway Protocol, such as Edge Gateway Protocol (BGP), routing Routing Routing Routing Routing Routing Route Routing Route in Different Autonomous Systems The time interval of the rule and the route update information when the network topology is changed. When the router receives the updated route update information containing a table item, update its routing table: The path to the metric value plus 1, the sender is recorded as the next hop. The RIP router is only maintained to the optimal path to the purpose (with the path with the minimum metric value). After updating your routing table, the router immediately sends a routing update to notify the change to other routers, which is independent of the update information periodically transmitted. RIP Routing Metric RIP uses a single route metric to measure the distance from the source network to the destination network. Each hop from the source to the purpose of the source is assigned a hop value, which is usually 1. When the router receives the route update information including the new or changed destination network entry, add its metric value and then deposited into the routing table, the sender's IP address as the next hop address. The RIP is limited by limiting the maximum number of hops from the source to the purpose, the maximum is 15. If the router receives routing update information with new or changed entries, it is considered that the destination network is not reachable. The RIP stability In order to adapt to the fast network topology, RIP specifies some stability features as other routing protocols. For example, RIP implements the split-horizon and hold-down mechanisms to prevent errors from routing information. In addition, RIP's hop limit also prevents infinite growth from generating a routing ring. 5. The RIP timer RIP uses some timers to control its performance, including routing update timers, route timeout, and route empty timers. Routing update timer records periodically updated time interval, usually 30 seconds, each time the timer is reset to increase the number of random seconds to prevent conflicts. Each routing entry has a related routing timeout timer. When the route timeout timer expires, the path is marked as a fail, but still saves in the routing table until the route empty timer has been cleared.
