From: Jenkins, Buddy (buddy.jenkins@xxxxxxxx)
Date: Wed May 08 2002 - 19:25:00 GMT-3
Jeff,
Refer to Doyle Volume1 Chapter 11 on redistribution. In the questions at the e
nd of the chapter there is a question (I don't have the book with me right now
so I can't tell you the specific question) that has the same scenario that you
have. Doyle says that the reason for that type of behaviour is because of the
rule of split horizon. This makes sense for you scanario below because IGRP wo
uld use split horizon and OSPF does not use split horizon. However this is the
part that still confuses me. I do not know why split horizon is applied to a
redistribution process. I always though split horizon was implemented to not a
dvertise a route out an interface from which that route was learned. Can any o
f the guru's out there explain why split horizon is applied during mutual redis
tribution?
Buddy
-----Original Message-----
From: Jeff Szeto [mailto:jytszeto@hotmail.com]
Sent: Wednesday, May 08, 2002 5:20 PM
To: ccielab@groupstudy.com
Subject: Redistribute ospf external route into igrp
Hi,
A router runs IGRP, OSPF and RIP. Mutual redistribution exist between
OSPF---RIP and OSPF---IGRP. But no redistribution between IGRP and RIP.
>From the debug message I found that IGRP is no advertising the RIP routes
that are redistributed into OSPF while the OSPF routes are advertised
normally.
On the other hand, the IGRP routes are advertised into RIP through OSPF.
Could someone explain the concept behind or point me to a document.
Thanks in advance.
Jeff
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