Little EIGRP Help

Unanswered Question
Mar 31st, 2008
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Pretty simple EIGRP question:

I have a main headquarters, and three offices directly connected via 10 meg point-to-point links to this office (hub and spoke). I am running EIGRP. For redundancy I am going to connect each of the three branch offices DIRECTLY to each other with T1 circuits. Besides adding the new "connected networks" to my existing EIGRP configuration, what else will I need to do to get this working?

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royalblues Mon, 03/31/2008 - 07:00
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That should get you going. Dis your hub and spoke topology invloved EIGRP stubs ?

Make sure the bandwidh statements are configured correctly otherwise you may find the router choses the backup circuit primarily for forwarding the traffic


mparella Mon, 03/31/2008 - 07:08
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Thanks! No, we never wnet ahead and enabled the EIGRP stub. Is this OK?

Richard Burts Mon, 03/31/2008 - 08:16
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With the direct links that you are installing to connect the spoke locations configuring stub would be a problem. For this implementation you need the spoke routers to not be EIGRP stub routers. If the spoke router were configured as EIGRP stub then it would not advertise the prefixes of its spoke neighbor to the hub and then your failover would not work.



mparella Mon, 03/31/2008 - 08:58
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Thanks, Rick. That's what I thought. One last item- I have voice running over my existing links. Will I run into any problems with multiple paths, etc. when I enable the other links?

Edison Ortiz Mon, 03/31/2008 - 10:21
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If you are load-balancing the traffic, EIGRP (by default) uses per-destination load-balancing so it does not break services such as voice. However, if you change the default behavior to 'per-packet', voice will be affected.





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