CCNA All in One

The Routing Information Protocol (RIP) was the first commonly used IGP in the history of TCP/IP. Organizations used RIP inside their networks commonly in the 1980s, and into the 1990s. RIPv2, created in the mid-1990s, improved RIPv2, giving engineers an option for easy migration and co-existence to move from RIPv1 to the better RIPv2. Features of Both RIPv1 and RIPv2 Like all IGPs, both RIPv1 and RIPv2 perform the same core features. That is, when using either RIPv1 or RIPv2, a router advertises information to help other routers learn routes; a router learns routes by listening to messages from other routers; a router chooses the best route to each subnet by looking at the metric of the competing routes; and the routing protocol converges to use new routes when something changes about the network. RIPv1 and RIPv2 use the same logic to achieve most of those core functions. The similarities include the following: Both send regular full periodic routing updates on a 30-...

The Routing Information Protocol (RIP) is a comparatively old interior gateway protocol (IGP) still in widespread use. IGPs are used for routing within networks that are under a common network administration, whereas exterior gateway protocols are used to exchange routing information between networks. As an IGP, RIP performs routing only within a single autonomous system. RIP is a classical distance vector routing protocol that uses hop count as its metric for determining the best route to a given destination. RIP Routing Updates RIP sends routing update messages at regular 30-second intervals and when the network topology changes. RIP uses broadcast User Datagram Protocol (UDP) data packets to exchange routing information. The routing update process is termed advertising.  When a router receives a routing update that includes changes to an entry, it updates its routing table to reflect the new route. The metric value for the path is increased by 1, and the sender is indica...