What is RIP Version 2 (Routing Information Protocol – RIPv2)?

Routing Information Protocol version 2 (RIPv2) is one of the simplest and most widely used internal routing protocols. This is especially true from version 2, which offers some important improvements that make it a necessary resource for any network administrator.

What kind of routing protocol is RIP?

RIP is a standard vector distance protocol based on RFCs 1388, 1723 and 2453. The main limitation is enforced by the maximum number of hops it supports: 15. The RIP assumes that everything has more than 15 hops. There is an infinite distance, and therefore there is no valid way.

In contrast, perhaps the most applied protocol. RIP is enabled by default on most devices (for example, some routers for small offices). In addition, firewalls that support RIP but not OSPF or EIGRP may be encountered.

Some of its features:

  • The management distance for Ripv1 and RIPv2 is 120.
  • RIPv2 sends routing updates via the multicast address 224.0.0.9.
  • On Cisco routers, version 2 is not enabled by default. You must use the version 2 command in the RIP configuration mode.
  • RIPv2 automatically summarizes routing updates.
  • The number of hops of the metric value.

How does RIP work?

The device sends the complete routing table to all connected neighbors every 30 seconds. Events triggered by events can occur, for example, if an interface falls before the 30-second timer expires.

As a distance-vector protocol, it is sensitive to the appearance of orientation loops. This is a result of not recalculating neighboring relationships or network topology, as in link-state protocols. This directly affects the quality of the routing information provided by the RIP.

What are the advantages of RIPv2?

Main developments:

  • VLSM support.
  • Multicast routing updates.
  • Routing updates with encrypted key authentication.

How to configure RIPv2

Unlike other routing protocols, RIP does not use autonomous systems or field numbers that identify a type of administrative unit. Therefore, the RIP configuration is very simple:

Router(config)# rip router
Router(config-router)# version 2
Router(config-router)# network 172.16.0.0

This last parameter indicates that the protocol is present on any interface for that network address:

  • Sends routing updates.
  • You’ll be aware of getting redirect updates.
  • Any routing update it sends will contain the network address of any interface that is “on”.
  • If you do not want to send routing updates through an interface, the passive-interface command must be used.

What are the commands that allow you to monitor RIP?

  • show ip route
  • show ip route rip
  • show ip protocols
  • show running-config
  • show running-config
  • debug ip rip

RIPv2 is an improvement of the functions and extensions of RIPv1. Some of these advanced features include:

  • The next-hop addresses added to routing updates.
  • Using multicast addresses when sending updates.
  • Authentication option available.
  • Both RIPv1 and RIPv2 are distance vector routing protocols, but have the following functions and limitations:
  • Use wait timers and other timers to help prevent routing loops.
  • Use of split-horizon on the opposite horizon to help prevent orientation loops.
  • Use of updates triggered when there is a change in the topology to achieve faster convergence.
  • The maximum limit for a jump of 15, with a jump number of 16 representing an inaccessible network.
  • Supports VLSM.
  • Summarize the networks in the routing table.
  • Updates send the mask.
  • Loopback interface
  • It makes sense for those who don’t exist physically.
  • We simulate networks or hosts.
  • The main application is to be the identity of the router.

RIP (Routing Information Protocol) Commands;

Show ip protocols: Indicates whether RIP is sending and receiving version 2 updates and whether the automatic summary is valid.

Int loopback 0: logical or virtual interfaces that interfere with router ID selection.

Int loopback 0
Ip address ip

debug ip rip: Displays information about RIP routing updates when the router sends and receives them.

no debug all: Disables all debugging that is enabled on the device.

undebug all: Disables all debugging that is enabled on the device.

Show version – Shows information about Cisco IOS and platform.

debug cdp ip: Displays IP-specific CDP information.

Using the UDP protocol and port 520, the RIP updates every 30 seconds and sends the entire routing table to its neighbors. RIPv2 makes updates triggered by events. Routes TTL (lifetime) is 180 seconds, which means that if the route does not appear active in 6 changes, it is deleted from the routing table.

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