Routing Information Protocol (RIP)

The Routing Information Protocol (RIP) is a dynamic routing protocol that helps to find the shortest path between two hops. This tutorial checks the working of the RIP protocol, its importance, and its different versions.

RIP is an interior gateway protocol (IGP) using the distance-vector routing algorithm.

The Importance of Routing Information Protocol

It creates a routing table that helps routers to find the network layout. Dynamic Routing table helps to understand the changes in network connections.

Working of Routing Information Protocol

RIP is a distance-vector routing protocol. It uses hop count as the routing metric.

15 is the maximum number of hops allowed in RIP.

RIP sends routing-update messages at regular intervals and and updates the routing table when the network topology changes. The average RIP update time is 30 seconds, while the hold-down time is 180 seconds.

In Which OSI Layer RIP Works?

One of the interviewer's favorite questions for a network engineer recruitment is which OSI layer RIP works. RIP is based on UDP and working in the Transport layer.

Routing by RIP is also called routing by rumor.

We have covered the importance and the working of the RIP. Let us check how the Routing Information Protocol maintains stability.

RIP Stability Features

RIP implements the following mechanisms to maintain stability. They are:

  1. Split horizon

  2. Route poisoning

  3. Hold down mechanisms

What Are the Different Versions of Routing Information Protocol?

One of the repeated CCNA questions is about the different types of RIP. There are three versions of Routing Information Protocol. They are:

  1. RIP version

  2. RIP version 2

  3. RIPng

RIP version 1 is the basic RIP which doesn't support VLSM. This drawback is fixed on the RIP version 2 where it supports Variable Length Subnet Mask (VLSM).

RIPv1 is a Classful Routing Protocol.

RIP version 2 uses multicast where RIP version 1 uses broadcast to send routing updates.

RIPv2 is a Classless Routing Protocol.

RIP version 2 multicasts routing updates to the address RIPng is specially defined for IP version 6.