From: Gustavo Novais (gustavo.novais@novabase.pt)
Date: Sat Jul 23 2005 - 20:45:24 GMT-3
Hello,
Your question is one I've been also debating since I've started my prep
for CCIE. I'm not trying to be accurate or mislead you in no way. I'm
only telling you what I've learned.
For what I've understood, when you redistribute between two routing
protocols the router goes to the Routing table and see which routes are
present in it for each routing protocol. Besides that it also checks the
RIBs of each protocol to see what routes belonging to which protocol are
directly connected (those belonging to a network statement). If you
notice, connected routes are present on the routing table as connected,
nevertheless they are redistributed. (I think ISIS is a bit tricky on
that, you have to redist connected, correct me if I'm wrong, please, I'm
always learning).
One thing you must be aware, I've noticed it throughout my practicing,
is that if you do redist connected but filter which routes are
redistributed, the denied routes, even if they are under a network
statement, are not redistributed.
I think my explanation is what I've come to understand of my study, and
one of the big guys (Michael Jordan type :)) should be able, at least to
point, you on the right direction. My advise is try it for your self,
and learn it the hard way... You may read about it often, but you won't
remember it unless you try it... (just like some other things in life!)
HTH
Gustavo
PS. Please correct me if I'm wrong or innacurate in any aspect
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Stephen Hull
Sent: domingo, 24 de Julho de 2005 0:12
To: ccielab@groupstudy.com
Subject: Redistribution and RIBs
I have a question about redistribution. I would like to know exactly
what happens on the router when you redistribute between routing
protocols. Specifically, does the redistribution command use the
routing table for redistribution or does it look directly at the RIBs
for each routing protocol and use those to redistribute directly between
them? I am just trying to get a good handle on where and what the
commands are actually doing.
Thanks,
Stephen
This archive was generated by hypermail 2.1.4 : Sun Sep 04 2005 - 17:00:30 GMT-3