EIGRP Question

[jeff.cook]

I think I have a miss understanding of what the network statement is for in EIGRP.

Does the network statement say what networks to talk about or what networks to talk to?

Thank you

[Richard Burts · Accepted solution]

Jeff

Yes, assuming that your EIGRP uses AS 1, you would put that command on each interface of the core. The core would see all of the detail routes. But the other routers would have only a single entry in their routing table for the p2p links.

HTH

Rick

[jeff.cook]

Thank You very much. It has been very helpful. The documentation is good, but gets a little confusing.

[jeff.cook]

Ok one last question...

I am currently setup with no auto-summary. What is the issue if I turn it on?

Thank You

[Giuseppe Larosa]

Hello Jeff,

to take advantage of manual summarization you need to have no auto-summary.

So your current configuration is good and ready for applying Rick's suggestions on how to avoid to have the details of point-to-point links in 10.99.0.0/16.

the command works on EIGRP updates sent out the interface(s) in which it is applied.

Hope to help

Giuseppe

[Richard Burts]

Giuseppe

The last time I tested it manual summarization in EIGRP worked regardless of whether auto summarization was enabled or disabled. Can you tell me that this has changed?

HTH

Rick

[Giuseppe Larosa]

Hello Rick,

I always used EIGRP with no auto-summary.

However, I was meaning to have full control of what summary routes are generated in the network.

What happens at an interface that is at a major network boundary between 10/8 and 172.18.0.0/16 ?

I see 10/8 (classful auto-summarized) or 10/9 (configured with ip summary-address) or both ?

I've checked the command reference and it tells only that auto-summary can be disabled to perform per interface subnet based summarization.

The small example of the command usage shows also no auto-summary.

http://www.cisco.com/en/US/docs/ios/iproute/command/reference/irp_eig1.html#wp1013188

Thanks for your note you are right there is no strict need of no auto-summary command.

Best Regards

Giuseppe