RIP

[jonk34567]

RIPv2 is a classless routing protocol.but when i  configuring Rip subnet mask information is not given. so how it can be considered as classless routing protocol ? 

R2-TUT(config)#router rip
R2-TUT(config-router)#version 2
R2-TUT(config-router)#network 213.123.20.0
R2-TUT(config-router)#end

[Predrag Jovic · Accepted solution]

When - network 213.123.20.0 - command is present RIPv2 will check are any of interfaces belong to that specific network range. On all interfaces belong to networks that are considered subnets will:

- send out routing updates

- listen for incoming routing updates

- include network and subnet into all advertisement

 RIPv2 will include subnet mask along with network address that is configured under interface into RIP messages.

[jonk34567]

so what you are telling is that RipV2  will get the subnet mask information from interface ip configurations

[Deepak Kumar · Accepted solution]

Hi, It is right that RIP2 is classless routing protocol but it needs one more command as "No auto-Summery". The configuration of which interfaces are attached to the RIP process will check the subnet and the same subnet will attach to routing update. Regards, Deepak Kumar

[jonk34567]

so what you are telling is that RipV2 will get the subnet mask information from interface ip/subnet mask configurations

[Deepak Kumar]

Yes.