IGP Routing loops (and prevention)

From: Cagri Yucel (cyucel@gmail.com)
Date: Wed Oct 18 2006 - 10:25:02 ART

Hi all,

Is there a criteria to put tags and filter them while mutually
redistributing between two IGPs at two points ?

For example at a lab I see RIP<->OSPF distribution fully tagged and filtered
on both protocols, on the other lab EIGRP<->OSPF is not tagged at all and
not causing any loops. What is the point I am missing ? What about
EIGRP<->RIP in the same manner ?

I know question sounds a bit humble but I am really confused. 

-- 
-cagri

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