From: Danny.Andaluz@triaton-na.com
Date: Sat Jul 12 2003 - 00:34:26 GMT-3
Hello, Group. I am doing the same scenario and I am seeing the same thing
as ccie2be. My router is running both OSFP and EIGRP and redistributing
between each protocol. When I do a redistribute connected under OSPF for a
loopback not under process, the route does not get sent back to the EIGRP
domain. I believe this is how it should act. Here's my logic:
The routes that are being redistributed into EIGRP are routes learned by
OSPF and any connected networks on the router which are under the OSPF
process. If a connected network is not under any routing process, then how
can it be redistributed into EIGRP from OSPF? The router does not know it as
an OSPF route. If you were to add this connected network under the OSPF
process then the EIGRP domain would get the route. That's why you also have
to do a "redistribute connected" under EIGRP. So that the EIGRP domain can
have that connected network as well.
I've been looking like crazy on CCO, but cannot find a link to back this up.
Why this is, who knows? But, that's my theory.
Thanks,
Danny
-----Original Message-----
From: Jonathan V Hays [mailto:jhays@jtan.com]
Sent: Friday, July 11, 2003 9:02 PM
To: 'Group Study'
Cc: 'ccie2be'
Subject: RE: Redistribution
> From this observation, is it correct to conclude that a route
> can only be
> redistributed once on a given router?
>
> I would have thought that once a routing protocol knows of a
> route, regardless
> of whether it learned about it from redistribution or from
> another router
> running that routing protocol, it could redistribute that
> route into another
> routing protocol, unless the route was filtered during
> redistribution. And,
> that now the 2nd routing protocol knows of that route, the 2nd routing
> protocol could redistribute the routes it knows into a 3rd
> routing protocol,
> etc.
>
> What do you all think. I'd appreciate your feedback. Thanks, Jim
>
Jim,
Howard gave some hints on a similar problem recently. See
http://www.groupstudy.com/archives/ccielab/200306/msg01693.html
You are correct: redistribution happens ONCE. Just think what would happen
if the router redistributed EIGRP routes into OSPF, then redistributed those
OSPF routes back into EIGRP, and so on.... Where would it stop?
Let's say you are running OSPF and EIGRP. You type this:
router eigrp 100
redistribute ospf 1 metric 1000 100 255 1 1500
Where does the IOS obtain the routes to be redistributed into the receiving
protocol (EIGRP in this case) ?
This archive was generated by hypermail 2.1.4 : Wed Aug 06 2003 - 06:52:37 GMT-3