From: Scott Morris (smorris@internetworkexpert.com)
Date: Tue Oct 14 2008 - 21:37:33 ART
No violations there. :) Saves me the typing! Hehehehe..
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Roger RPF
Sent: Tuesday, October 14, 2008 5:33 PM
To: 'naman sharma'; 'Cisco certification'
Subject: AW: Redistribution Rule
Hi Naman,
I know how you feel, a had exact the same questions as you, which made me
crazy :o) Scott Morris gave me once a very good explanation on how the rule
works which really helped me to understand it.
I'll just post here the answer which Scott gave me, so all thanks go to him,
it's not my description...
I hope this will also help you
@Scott, I hope I do not violate any rule of "intellectual property right",
posting this message :o))
"When the ONLY thing you are doing is redistributing RIP. This will look in
the RIP Database and pull routes. If there's no other criteria, then it gets
redistributed to OSPF.
Now you have introduced extra criteria. So it's not just pulling things from
the RIP Databse, but also asking "Is this really a RIP route"
and if you do "show ip route (x.x.x.x)" it will tell you what it's learned
by. Since this is via Connected, AND you have a "redistribute connected"
command, that route cannot be added via "redistribute rip", instead it has
to go through your connected route-map. And if it doesn't match, it won't
go.
Think of it this way.... If you only own one car, and you want to drive to
the store, there's not much choice that happens in terms of which car should
you use! However, if you own two cars, then you get to choose. Do you choose
by gas mileage? Do you choose based on which car is most likely to pick up
chics? Whatever makes sense, but you have multiple criteria now.
The router works in the same fashion."
regards
Roger
-----Urspr|ngliche Nachricht-----
Von: nobody@groupstudy.com [mailto:nobody@groupstudy.com] Im Auftrag von
naman sharma
Gesendet: Dienstag, 14. Oktober 2008 23:02
An: Cisco certification
Betreff: Redistribution Rule
Hi Group,
I am just too confused with redistribution default rule, can anyone help me
on this.
As per the rule when we redistribute between 2 protocols then the connected
interfaces on which the protocol is already running will get redistributed
into another protocol immediately.
Now in case one protocol has redistribute connected with route-map
configured this rule breaks, here is the example.
Mutual Redistributing between RIP and OSPF.
RIP running on serial0/0/0 and fa0/0 of router OSPF running on s0/0/1 and
Fa0/1 of router.
Now in case there is a redistribute connected command configured under OSPF
with route-map then when RIP is getting redistributed into OSPF then s0/0/0
and Fa0/0 connected interfaces will not be automatically redistributed as
per the break in the rule and we have to manually add these interfaces under
OSPF redistribute connected route-map.
Please correct me if i am wrong.
Thanks
Blogs and organic groups at http://www.ccie.net
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