[c-nsp] cost community alternatives

[Kenny Sallee]

What if you used a different routing protocol on the backdoor link and
redistributed (carefully) between EIGRP and the diff routing protocol on the
backdoor router at each location?  You'd have external EIGRP routes
everywhere then and could create different seed metrics at the MPLS border
(CE router) and on the backdoor routers to automagically prefer one path
over the other.   You'd have to tag routes at points of redistribution and
filter them on CE router (keep site B's routes from being advertised via BGP
on CE router at site A and vice versa for example).  A little messy but
works.

Kenny

On Wed, Apr 14, 2010 at 2:16 PM, Pan vangels <panvangels at hotmail.com> wrote:

>
>
> Thanks Luan.
> I tried indeed and it worked.
> However, since offset-list actually modifies the metric and all those ext
> eigrp routes are still viewable with an AD of 170, how does it happen for
> them to be preferable over internal eigrp ones??
> Finally what is the difference of an offset-list when compared to a
> route-map setting a low metric for external routes while redistributing from
> ebgp to eigrp?
> Cheers,
> Pan
>
>
>
> -------------------------------------
>
>
>
>
> Try using the offset list command.
>
> Regards,
>
> -------------------------------------
> Luan Nguyen
> Chesapeake NetCraftsmen, LLC.
> ------------------------------------
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Pan vangels
> Sent: Monday, April 12, 2010 1:57 PM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] cost community alternatives
>
>
>
> If 1) ebgp is used as PE-CE protocol, 2) eigrp is used into customer's
> network, and 3) a backdoor link exists between CE routers, is there any way
> of external eigrp routes coming from ebgp into eigrp to be prefered over
> normal eigrp routes advertised through the backdoor link?
> Distance command would do the trick but this has to be defined on all
> internal customer routes.
> On the other way cost community is not extendable over an ebgp session...
>
> Thnx,
> Pan
>
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