From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Tue Jul 25 2006 - 11:24:15 ART
Hi Brian, thanks for your reply
What I'm trying to do here, is to obtain global rechability, but R3 in this
case is not running BGP.
I know that I can peer the loopback of the remote-neighbor, but if I ping
from R5 to any BB attached to R1 or R2; R3 would drop all Packets, sat that
R1 and R2 peer to BB1 and BB3 and this 2 routers belongs to AS 54 (something
similar to your WB topology, but with BB1 also connected to Sw2 in port
f0/23)
Yes: R1,R2,R4,R5 are in the same AS; and they peer to each other in a full
mesh fashion using their loopbacks.
for example lets say that R2 -- BB3 is setting the local Preference 200 for
all BGP routes and a weight of 1000; and R1 -- BB1 is setting the Local
Preference for all BGP route to 100 and a Weight of 1000.
If you see the BGP Routing Table at R4 or R5, if would prefer R2 to exit the
AS, but if you trace the BGP route it would be droped at R3, another point
here is that when you redistribute BGP routes into IGP, it would not respect
the Local AS Policies, so simple redistribution could not be accomplished (I
think).
I know this is disparate, but it would be nice to have something like a
Multipoint Tunnel at each router.
Please let me know if you need some more information
Saludos and Thanks
Victor.-
-----Mensaje original-----
De: Brian McGahan [mailto:bmcgahan@internetworkexpert.com]
Enviado el: Martes, 25 de Julio de 2006 10:04 a.m.
Para: Victor Cappuccio; ccielab
Asunto: RE: Transiting Non-BGP Speaking Devices
Victor,
What exactly are you trying to accomplish, IP reachability
between R1, R2, R4, and R5? Are they all in the same AS? Where are the
prefixes coming from?
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Victor Cappuccio
> Sent: Monday, July 24, 2006 10:00 PM
> To: 'ccielab'
> Subject: Transiting Non-BGP Speaking Devices
>
> Hi Guys, I know this is a very newbie question, but it keeps spinning
in
> my
> head.
>
> Ok this is the dilemma
>
> R1 --- R3 ---- R2
>
> R1-R2-R3 runs any IGP.
>
> R1 and R2 are running BGP in AS 12 and they peer via each other
Loopback
> Address (/32 BTW).
>
> So, I need to solve the Non-BGP Transitive Device Problem, I know that
I
> can
> use tunnels or maybe redistribute BGP routes at R2 and R1.
>
> But the question is more difficult (for me at least); say that I add
> another
> 2 BGP Devices connected to R3
>
> R5
> .
> .
> R1 ------ R3 ------ R2
> .
> .
> R4
>
> I need to create a full mesh BGP Session between R1; R2; R5; R4 using
> their
> loopbacks Address (/32 BTW).
>
> So creating tunnels here is out of the game, because you can not add
extra
> Ip addressing.
>
> Now redistributing the BGP Routes to the current IGP, would NOT help
me if
> I
> need to create some AS Policies. - Like Local Preference.
>
> Maybe MPLS would solve the problem (do not know how to configure, and
I
> think that would be out of the scope of the CCIE Lab for now)
>
> Any recommendations for this particular problem?
>
> Thanks
> Victor.-
>
>
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