The RIP uses a distance-vector algorithm. By default, RIP uses a very simple metric system: the distance is defined as the number of links to reach the destination site, taking values from 0 to 16. Infinity is defined as 16. The RIP process uses UDP port 520 to send and receive RIP packets. RIP packets are sent as broadcast packets every 30 seconds, and subsequent packets are sent after a random delay to prevent "broadcast storms". In RIP, if a route does not update within 180 seconds, its metric is set to infinity, and the corresponding entry is deleted from the routing table.

RIP is used to enable and set up the RIP dynamic route protocol for Network Secure devices, including network, interface, neighbor, and parameter configurations. Check Enable, as shown in the following figure.