Routers does not accept whole IP address into RIP network

[ikarussmh]

Hello,

So i am trying to config router RIP v2  with this subnet IP:

129.208.63.1 but when i do it with command "#network 129.208.63.1" In Routing -> RIP i can see just Network Address 129.208.0.0 (!)

The same happens when I do 129.208.48.0 and so on. Can somebody tell my what is wrong? I saw a lot of tutorial about RIP subneting but i can not figure out where I do something wrong

[mlund]

Hi

If you don't specify the mask, the router assumes the default mask for a network.

/16 is the default mask for class B networks.

If you are using subnets of the network 129.208.0.0 you have to specify the mask you are using.

For example 129.208.63.1 must have /32 to work

129.208.48.0 is also a subnet, so probably /24 will make it work. (assumption by me that you where using /24).

/Mikael

[Seb Rupik]

Hi there,

RIPv2 is a classless protocol, meaning that it will send the subnet masks with the advertised prefixes. However the configuration is still classful. So although you will have a statement "network 129.208.0.0" in the configuration, any connected interfaces within that classful summary will be advertised explicitly. So you should still see updates for 129.208.63.0/24 being sent to your RIPv2 neighbours.

cheers,

Seb.

[paul driver · Accepted solution]

Hello
As RIP by default is a classful routing process, When you apply the network command in rip, even if you apply the subnet address as you have shown RIP will ALWAYS convert that network to its related classful address.

Class A  -  0.0.0.0 -127.255.255.255.        eg: 10.0.0.0
Class B  -  128.0.0.0 – 191.255.255.255    eg: 133.16.0.0.0
Class c -   192.0.0.0 -  223.255.255.255    eg : 192.168.1.0

[Joseph W. Doherty]

I also recall (?), what @paul driver notes applies to RIPv2 too.

[Richard Burts]

The original poster tells us " In Routing -> RIP i can see just Network Address 129.208.0.0 (!)" We are attempting to answer questions about an environment that we are not sure of. Answers to these aspects would help us understand better:

- was a single subnet configured? Or multiple subnets? If so what are the subnets that are configured?

- how was RIP configured? Posting the complete RIP configuration would help us understand what parameters were used.

- how are you looking? The output of "show ip route"? the output of "show ip interface brief"? some other command?

- Where are you looking? On the router where the subnet(s) are configured? On a neighbor router?

- If on a neighbor router is it running RIPv2? What network/subnet connects the neighbors?

[ikarussmh]

I greatly appreciate your help. After some testing I think that i figured it out. I was really confused about the RIP table not showing the whole IP address of subnet after inserting.