do not inform any topology change to EIGRP neigbor

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Oct 20th, 2008
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Hi guru, i got question here :

RA ---- RB

(EIGRP 10)


RA do not inform any topology change over the RB


1. RA configure passive interface

2. ? (Other than passive interface, stub? )

Thanks in adavance for advices.

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Istvan_Rabai Mon, 10/20/2008 - 08:42
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Hi William,

The question is what exactly you want.

If you configure RA's interface as passive then there will be no neighbor relationship between RA and RB and no exchange of routing updates will occur. And of course there will be no information sent on any topology change either.

Are there any other conditions that you have to meet?

If not, then the passive interface command will be a good solution.



Richard Burts Mon, 10/20/2008 - 10:08
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I agree with Istvan that if we knew more about your situation and about your requirements that we could give better answers.

If you do need to have an active EIGRP neighbor relationship and want no topology updates to be sent one alternative might be to advertise only a default route to RB. This would prevent RA from sending any topology changes. You could accomplish this by applying a distribute list to updates from RA to RB which permits only the default route, or you could accomplish this by configuring ip summary-address on RA specifying a summary of



william2u Mon, 10/20/2008 - 19:16
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Hi All gurus,

Actually the requirement is cannot use passive interface to accomplish it.

As for the solution from "rburts ", u mean sending a summary route wiht to RB, but for your information, RB also connect to other eigrp router.

Istvan_Rabai Mon, 10/20/2008 - 21:47
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Hi William,

The simplest solution to this is to use different EIGRP AS numbers for RA and RB.

In that case no neighbor relationship will be formed and no updates will be sent.

The problem is that Rick and I come up with different solutions in each our post, and you release a little piece of information or restriction on why this solution is not suitable.

If you cannot give full information on the conditions you have to meet then we will exchange emails for weeks and not find a right solution for you.




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