EIGRP routes are not advertised at all

[turbo_engine26]

I don't know why the post has disappeared but here i am posting it again.

Hello all,

I am currently having a strange router behavior. As shown in the attached simple topology, R3 is connected to several switch ports, each port represents a subnet and each port is in different VLAN. Each port is configured as access not dot1q. The goal is that i want to see these subnets on R3's routing table as connected and advertise them to both Zermatt and Moritz as EIGRP routes. However, after i turned EIGRP on in these routers, i don't see the usual EIGRP routes on those upstream routers. (Strange simple issue)

The aim is that i want to draw a BGP topology to test route filters by NLRI and this topology is taken from "Routing TCP/IP Vol 2" book. The thing is that all the drawings in this book are logical (just Clouds). So i am translating those clouds into physical connection because my current software emulator understands only physical topology as in real life.

Please see attached all the information you need.

Regards,

A.M.

[Richard Burts · Accepted solution]

AM

There is a simple explanation for this issue. The network statements in your EIGRP do not match the networks configured on your interfaces. For example you have these networks on interfaces in your configuration:

ip address 192.168.10.2 255.255.255.0

ip address 192.168.20.2 255.255.255.0

ip address 192.168.100.1 255.255.255.0

ip address 192.168.2.1 255.255.255.0

the closest entry under EIGRP is

network 192.168.0.0

but that only matches one class C network and that network is not in your config. If you put in network statements for the other networks under EIGRP it should work much better.

HTH

Rick

[turbo_engine26]

Hello Rick,

So sorry for the late reply.

By the way, i've tried also the exact subnets instead of the major one but also didn't work. Guess what was the problem! it was from the software emulator itself as i use GNS3 for practicing. I restarted the entire AS topology and it worked with only subnets not major which means you solution is correct.

Thank you very much

Regards,

A.M.

[Kishore Chennupati]

hi,

A rick suggested you need to mention the networks subnets that match the routes in your routing table.

or atleast use a wildcard mask.

network 192.168.0.0 0.0.255.255

If you add the above wildcard mask then you should see all the 192.168.x.x subnets in your upstream routers.

HTH

Regards,

[Richard Burts]

AM

I am glad that you got it working and that my suggestion pointed the way to the solution. It is odd that the solution did not work at first but did work after you restarted the emulator. I guess that just points out that we need to be quite careful when using emulators. Thank you for using the rating system to mark this question as answered - and thanks for the points. It makes the forum more useful when people can read about an issue and can know that a solution was found. You have contributed to this process.

HTH

Rick

[turbo_engine26]

Exactly! Even though emulators is an excellent solution for hands-on practicing, they are risky and vulnerable to software bugs like any software. However, the emulator's author regularily release updates and new versions. I can say that, for example, the two previous versions were a mess and full of bugs at the commands level. This means that in every new versions, many things gets fixed properly.

About the rating system, i always love to give people what they deserve and you deserved a rating because you provided a correct a solution regardless restarting the emulator. Appreciation is my number one priority.

HTH

A.M.

[paolo bevilacqua]

turbo_engine26 wrote:
About the rating system, i always love to give people what they deserve and you deserved a rating because you provided a correct a solution regardless restarting the emulator. Appreciation is my number one priority.

A proposition not always shared by others here. Rated for this.

[turbo_engine26]

Thanks Paolo