CCNA LAB - RIPv2

What is RIPv2?

·       RIPv2 is a distance vector routing protocol.

·       RIPv2 is a Classless routing protocol.

·       RIPv2 uses hop count as its only metric for path selection.

·      RIPv2 have administrative Distance is 120

·       Advertised routes with hop counts greater than 15 are unreachable.

·       Use of multicast addresses in sending update

RIPv2 is  an enhancement of RIPv1's features and extensions rather than an entirely new protocol. Some of these enhanced features include:

·       Next-hop addresses included in the routing updates

·       Use of multicast addresses in sending updates

·       Authentication option available

 RIPv2 is a distance vector routing protocol like RIPv1 so both versions of RIP share the following features and limitations:

·       Use of hold down and other timers to help prevent routing loops.

·       Use of split horizon or split horizon with poison reverse to also help prevent loops.

·       Use of triggered updates when there is a change in the topology for faster convergence.

·       Maximum hop count limit of 15 hops, with the hop count of 16 signifying an unreachable network.

RIPv2 Message?

RIPv2 has the same basic message format as RIPv1, two significant extensions are added.

• The first extension in the RIPv2 message format is the sub-net mask field that allows a 32 bit mask to be included in the RIP route entry
• The second significant extension to the RIPv2 message format is the addition of the Next Hop address.

RIPv2 Configuration

Topology

Configuration for R1

 R1#conf t

R1(config)#int s1/0

R1(config-if)#ip add 100.1.1.2 255.255.255.0

R1(config-if)#no shut

R1(config-if)#int s1/1

R1(config-if)#ip address 20.1.1.1 255.255.255.0

R1(config-if)#no shut

R1(config-if)#ex

 RIPv2 Configuration Commands for R1

R1(config)#router rip

R1(config-router)#version 2

R1(config-router)#network 20.1.1.0

R1(config-router)#network 100.1.1.0

 Configuration for R2

R2#config t

R2(config)#int f1/0

R2(config-if)#ip address 172.16.2.1 255.255.0.0

R2(config-if)#no shu

R2(config-if)#int s2/0

R2(config-if)#ip address 100.1.1.1 255.255.255.0

R2(config-if)#no shut

R2(config)#router rip

R2(config-router)#version 2

R2(config-router)#network 172.16.0.0

R2(config-router)#network 100.1.1.0

Configuration for R3

R3(config)#int s2/0 

R3(config-if)#ip add 20.1.1.2 255.255.255.0 

R3(config-if)#int f1/0

R3(config-if)#ip add 10.2.2.1 255.255.255.0

R3(config-if)#ex

R3(config)#router rip

R3(config-router)#ver 2

R3(config-router)#network 10.2.2.0

R3(config-router)#network 20.1.1.0

RIP Verification:

 Show ip route command should display all RIP networks and end to end ping should be successful.