RE: How route redistribution EXACTLY works --- need confirmation

From: Xu, James (james.xu@xxxxxxx)
Date: Thu Feb 14 2002 - 16:13:04 GMT-3

   
I would like add a little more to explain why I believe the RIP is not
picking up routes from routing table:

Suppose there is a connected route in the router, which is configured to be
under RIP process. In the routing table, this route will be showed as
"connected". But the RIP still is redistributing this route out anyway. As
a fact, this route shows up on your rip database too.

James

-----Original Message-----
From: Lab Candidate [mailto:labccie@yahoo.com]
Sent: Thursday, February 14, 2002 1:48 PM
To: Xu, James; ccielab@groupstudy.com
Subject: Re: How route redistribution EXACTLY works --- need
confirmation

James,

I don't think there's such a thing as RIP route database.
The RIP process will pick up routes directly from the
routing table, whereas ospf picks from its database. 

---

--- "Xu, James" <james.xu@eds.com> wrote:
> All:
>
> It has been and still puzzling me how a routing process pick routes and
> redistribute them into another routing process and vice versa? As an
> example, mutual redistribution between RIP and OSPF in a router:
>
> Here is my experience and explanation:
>
> 1). The RIP process picks all RIP routes inside its database, and
> redistributes these routes into OSPF routing process.
> 2). OSPF process picks all OSPF routes in the OSPF database, and
> redistributes these routes into RIP routing process.
>
> During the redistribution, the split-horizon rule appies, meaning the
newly
> redistributed routes from RIP into OSPF will not be redistributed back
into
> RIP right away, and vice versa.
>
> Any input are appreciated, especially some links for this mechnism.
>
> James

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