Eigrp routing problem

From: Szeto Jeff (jytszeto@hotmail.com)
Date: Fri Nov 01 2002 - 04:31:17 GMT-3

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Hi Group,

I have a eigrp problem in a live network.

R1-s0---------s0-R2-e0-------e0R3-s0---------s0-R4-e0

Only eigrp is running. Everything is alright in normal condition. The
problem is if R4's ethernet (e.g 172.16.1.0/24) is down, R2 will advertise
it can reach that network via R1, which is impossible.
Sure, an outbound access-list in R1 can solve this situation, but I want to
know why.
Split-horizon is enabled (by default).

Could anyone tell me what are the possible reasons?

Thank you very much.

Regards,

Jeff

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