RIP Beginner

please specify clearly which router image is needed to use this topology

It's in the article, at the bottom it says:

IOS:

c3640-jk9s-mz.124-16.bin

Bonjour Rene

i am using a different IOS [c3660-telcoentk9-mz.124-13b.bin] and i came to the point where i need to get it to advertise a Default route and got quite stuck !

the way i found a solution to show myself a proof of concept was to add a default route [on a stub router] ; then activated RIP and added network 0.0.0.0

and what do you know ! it worked ; rip started advertising about my stub network [that was not included in its configuration for RIP networks]

this is really cool BUT i still cannot get the theory behind it
so i thought to ask you if you may tell me about some document or concept that clarifies this behavior

thank you for everything

Cordialement

Bonjour Shareef,

Be careful with other IOS warnings, some of them might give you a hard time...crashing Dynamips and such, or features that don't work.

Every routing protocol has a different method of creating a default route, keep the following in mind when configuring RIP:

1) The "Network" command tells the router on which interface to start talking RIP, it will also advertise the network that you configured on the interface. If you use the command 'network 0.0.0.0' it will activate RIP on every interface that falls under the 0.0.0.0 range...of course that is every interface with an IP address. If you have for example 192.168.12.0/24 on an interface, then this is what the router will advertise to it's neighbors.

Now about creating a default route....

2) There are 2 ways to configure a default route:

a) By creating a summary, you need to do this on an interface level by using the "ip summary-address rip" command.

For example:

enable
configure terminal
interface f0/0
ip summary-address rip 0.0.0.0 0.0.0.0

b) By using the "default-information originate" command, for example:

enable
configure terminal
router rip
default-information originate

Does this make sense to you? Let me know if you have any questions...

Bonne chance!

Hi team, Really informative website, good job guyz, i need help in getting IOS , how & from where can i find it in your website

Welcome aboard!

We can't share the IOS images on the website since it's not allowed The filename(s) I specify at every lab should help you though...Google is your friend

Hello,
I don't know how to do this part: Amsterdam: make sure no routing updates are sent to the loopback interface.
I was thinking about to use passive-interface. But I found out that only ensure the interface will not forward information. But it will still receive. So what should I do to meet this requirement.
Thank you.

For some reason the default route would not take on the Utrecht router even with the following forementioned commands:

Utrecht#sho run | beg int
interface Loopback0
ip address 3.3.3.3 255.255.255.255
ip rip advertise 10
!
interface FastEthernet0/0
ip address 192.168.23.3 255.255.255.0
ip rip advertise 10
ip rip send version 1 2
ip rip receive version 1 2
ip summary-address rip 0.0.0.0 0.0.0.0
duplex auto
speed auto
!
router rip
version 2
timers basic 10 180 180 240
passive-interface Loopback0
network 3.0.0.0
network 192.168.23.0
no auto-summary
!
Utrecht#sho ip route
Gateway of last resort is not set

R 192.168.12.0/24 [120/1] via 192.168.23.2, 0001, FastEthernet0/0
1.0.0.0/32 is subnetted, 1 subnets
R 1.1.1.1 [120/2] via 192.168.23.2, 0001, FastEthernet0/0
2.0.0.0/32 is subnetted, 1 subnets
R 2.2.2.2 [120/1] via 192.168.23.2, 0001, FastEthernet0/0
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback0
C 192.168.23.0/24 is directly connected, FastEthernet0/0

So, I ended up invoking the following static route command for the default route:

Utrecht#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Utrecht(config)#ip route 0.0.0.0 0.0.0.0 192.168.23.2
Utrecht(config)#end
Utrecht#
*Mar 1 00:29:11.695: &#xSY;S-5-CONFIG_I: Configured from console by console
Utrecht#sho ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is 192.168.23.2 to network 0.0.0.0

R 192.168.12.0/24 [120/1] via 192.168.23.2, 0008, FastEthernet0/0
1.0.0.0/32 is subnetted, 1 subnets
R 1.1.1.1 [120/2] via 192.168.23.2, 0008, FastEthernet0/0
2.0.0.0/32 is subnetted, 1 subnets
R 2.2.2.2 [120/1] via 192.168.23.2, 0008, FastEthernet0/0
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback0
C 192.168.23.0/24 is directly connected, FastEthernet0/0
S* 0.0.0.0/0 [1/0] via 192.168.23.2

The static default route appears to work, perhaps GNS3 went quirky. The other routers worked fine with the "default-information originate" command.

Thanks so much for this lab and I will definitely continue on with the others.

add to interface FastEthernet0/0
no ip split-horizon
to achieve your task.

Njoi,
Shoeb

Hmm normally default-information originate to advertise a default route shouldn't be a problem in RIP.

Hi Rene,

About the default network on Utrecht. I have solved it another way. It is with another command but I am worndering what your take on this one is?

I've created an default network on Utrecht:
ip default-network 192.168.23.0

In the routing table of Amsterdam shows a:
R* 0.0.0.0/0 [120/2] via 192.168.12.2, 0006, FastEthernet0/0

And on Rotterdam:
R* 0.0.0.0/0 [120/1] via 192.168.23.3, 0001, FastEthernet1/0

Is this a case of "multiple roads to Rome"?

Thanks for your time.
Lino

Hi Lino,

It sure is...this is another method of doing it. There are multiple methods of getting "the job done"

Rene