From: George Spahl (g.spahl@xxxxxxxxxxxxx)
Date: Wed Jun 12 2002 - 18:22:04 GMT-3
The best explanation of redistribution that I have seen is in Alex
Zinin's excellent book, "Cisco IP Routing". He says, in a nutshell,
that if you redistribute Protocol 1 into Protocol 2 it simply tells
Protocol 2 that when it's composing its routing update, it should also
include the routes in the local routing table that belong to Protocol 1.
Since this doesn't change the local routing table in any way, you can
see that it would have no effect on another redistribution from Protocol
2 into Protocol 3. There are some other details and rules with regard
to how all this is done, but that's the gist of it. Hope this helps!
George
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Volkov, Dmitry (Toronto - BCE)
Sent: Wednesday, June 12, 2002 3:35 PM
To: 'Carlos G Mendioroz'; ccielab@groupstudy.com
Subject: RE: OSPF redistribution
OK Carlos.
Suppose we have on the SAME router the following redistribution:
Protocol_1 <---> Protocol_2 <----> Protocol_3
Will route from Protocol_1 be redistributed to Protocol_3 ???
I think will.. I have to check..
I have "connected" (like another protocol - isn't it ?) --> Protocol_1
(Igrp)--> Protocol_2 (OSPF)
Protocol_2 (OSPF) doesn't know about "connected" via redistribution.
Do You know any link (@cco maybe) which can confirm this rule ?
Thanks,
Dmitry
-----Original Message-----
From: Carlos G Mendioroz [mailto:tron@huapi.ba.ar]
Sent: Wednesday, June 12, 2002 2:41 PM
To: Volkov, Dmitry (Toronto - BCE)
Cc: Groupstudy ccielab list
Subject: Re: OSPF redistribution
Dmitry,
usually knowledge acquired by redistribution from another protocol
is not redistributed, to prevent information loops.
Connected and Static are for the redistribution mechanism much the
same as another protocol.
"Volkov, Dmitry (Toronto - BCE)" wrote:
>
> Hello group,
>
> Probably simple question. I need conceptual explanation..
>
> R1---R2---R3
> R1 - ospf; R2 -ospf/igrp (mutual redistribution); R3 - igrp
>
> I have Loopback on R2 152.100.100.1 , OSPF is not runing on this
Loopback
>
> 1) situation:
> R2#router igrp 64
> network 152.100.0.0
>
> R1 & R3 have knowledge about 152.100.x.x. (R1 got external route via
> redistr)
>
> 2) situation
> R2#router igrp 64
> redistribute connected metric 10000 100 255 1 1500 route-map loopback
>
> R3 knows about 152.100.x.x. and R1 - DOESN'T KNOW- WHY ??
>
> Very appreciate for any explanation or point me to link please..
>
> Sincerely,
> Dmitry Volkov
This archive was generated by hypermail 2.1.4 : Tue Jul 02 2002 - 08:12:32 GMT-3