From: Abdul Waheed Ghaffar (a_w_ghaffar@hotmail.com)
Date: Tue Sep 23 2003 - 06:11:09 GMT-3
1. R2 will not be ASBR it will be ABR and this is responsibility of ABR to
convert L7 into L5.
2. If you insert R2a it will become part of NSSA because you have to
configure NSSA on that router ...means it will have L1, L2, L3 and L7...
regards
>From: Ken.Farrington@barclayscapital.com
>Reply-To: Ken.Farrington@barclayscapital.com
>To: ccielab@groupstudy.com
>Subject: OSPF - ABR/ASBR in NSSAs
>Date: Tue, 23 Sep 2003 08:17:37 +0100
>
>Please expand e-mail window to see diagram correctly :)
>
> AREA0 Area3
>
> +----+ +----+ +----+ 3
> | R1 |--------------------| R2 |---------------------| R3 | nets
>Redist
>connected subnets
> +----+ 10.0.0.0/24 +----+ 11.0.0.0/24 +----+
>
> ABR
>ASBR
>
>
>11.0.1.0/24
>
>11.0.2.0/24
>
>11.0.3.0/24
>
>
>Guys,
>
>I have the above setup, and if I keep area 3 as a normal area, R3 is an
>ASBR (redist con) and R2 is an ABR.
>If I make area 3 a stub area I have to use an NSSA correct, as a stub area
>does not expect Type 5s.
>Please could you confirm this?
>
>Also, If I have area 3 as an NSSA, why does R2 become an ASBR as well as an
>ABR? Is it to do
>with the fact R2 has to convert a type7 LSA to a type5 LSA and this
>function
>automatically makes
>R2 into an ASBR?
>
>If so far is correct? if I inserted a router between R2 and R3 (called
>R2a), would this just be a
>normal internal area router? as it would pass L7s (I assume) to R2 or would
>it become something else?
>
>Please could someone confirm this concept.
>
>Many thx indeed,
>Ken
>
>
>
> ________________________________________________________________
> Ken Farrington
> Global Networks, Barclays Capital, 5 The North Colonnade, Canary
>Wharf, London, E14 4BB
> * Tel : 020 7773 3550
> * Mob : 07768-866655
> * ken.farrington@barcap.com
>
>
>
>
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