From: Narbik Kocharians (narbikk@gmail.com)
Date: Mon Sep 10 2007 - 19:52:37 ART
with the "no-summary" option, the ABR will inject a default route and
it will also block all LSA type 3s, therefore, the routers in the NSSA area
will NOT see the inter-area routes. But with the "default-information"
keyword, the ABR will inject a default route but it won't block LSA type 3s
and as a result of that the routers within the NSSA area will still maintain
LSA type 3s (Inter-Area routes).
On 9/10/07, Carlos Trujillo Jimenez <nergal888@hotmail.com> wrote:
>
> Hi all.
>
> I have a NSSA area, the routers from the NSSA dont need reachability
> information about the external prefixes, that means I must inject a
> default
> route for the external prefixes reachability.
>
> I have two options to do it.
>
> at the area border router:
>
> area 23 nssa no-summary
>
> or
>
> area 23 nssa defalut-information-originate
>
> Is there any significant difference between both options?? both works, by
> a
> show ip route at the internal routers of the nssa area I can see an
> external
> IA default route with both commands, theres is no difference, any ideas
> when
> one of these options can and cannot be used???
>
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-- Narbik Kocharians CCIE# 12410 (R&S, SP, Security) CCSI# 30832 www.Net-WorkBooks.com
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