FREE CCNA LAB

This CCNA Packet Tracer lab has been provided to help you gain a better understanding of how to configure and troubleshoot RIP version 2 in this lab we will configure a basic lab topology, enable RIPv2 on the routers and configure them to advertise their networks. We will also learn to use Cisco IOS show and debug commands to verify and troubleshoot our lab.

Learning Objectives:

• Review basic router and switch configuration.
• Enable RIPv2 on a router.
• Advertise networks using RIPv2.
• Disable RIPv2 automatically summarizes
• Configure Passive Interfaces.
• Summarizing Routes with RIPv2.
• Verify RIPv2 configuration.
• Use debug to verify RIPv2 updates

The Routing Information Protocol (RIP) is one of the oldest distance-vector routing protocols, which uses the hop count as a routing metric. RIP avoids routing loops by employing a limit on the number of hops permitted in a path from the source to a destination. The maximum number of hops permitted for RIP is 15. A hop count of 16 is considered an infinite distance, in other words the route is considered unreachable. Despite this limitation, RIP works great for basic route communications between devices.

Here are some important RIP facts:

• RIP’s administrative distance is 120 for both RIPv1 and RIPv2.
• RIPv2 sends routing updates via multicast address 224.0.0.9.
• Cisco routers don’t enable RIPv2 by default. To use RIPv2, you must use the ver 2 command in RIP Router Configuration Mode.
• RIP automatically summarizes routing updates. You can disable this by using the no auto-summary command.
• RIP uses hop count as it’s metric.

How RIP works:

With RIP, a router sends its full routing table to all other connected routers every 30 seconds. Triggered updates can also occur if a router goes down before the 30-second timer has expired. RIP performs “routing by rumor” and is more prone to loops than other routing protocols. That’s because a RIP router sends its entire routing table to every other router. All other routers do the same, and because there’s no real neighbor relationship or calculation of routes, the routers have little firsthand knowledge of available networks.

RIPv2 boasts the following enhancements:

• Support for variable length subnet masks (VLSM) (Because of this, RIP doesn’t assume that all networks are classful.)
• Multicast routing updates
• Authentication with an encrypted password for routing updates.

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