[c-nsp] Regarding ASBR in ospfv3

[Oliver Boehmer (oboehmer)]

varun srivastava <> wrote on Wednesday, January 11, 2006 6:31 AM:

> Hi,
>   can anybody tell that how AS boundary routers are decided. Is they
> are manually configured or is there is a dynamic procedure to learn
> ASBR.

as soon as you redistribute anything into OSPF (i.e. the router
originates Type5/7 External LSAs), the router becomes an ASBR.

>   My second question is - inter-are router lsas are used to describe
> position of ASBR in the area by Boundary routers. So if a router is
> ASBR, will it generate inter-area router lsa in the areas connected to
> it describing itself as ASBR i.e in inter-area router LSA advertising
> router ID and Destination Router ID will be the same.

Hmm, no. The Inter-Area-Router-LSA (Type 4 LSA in IPv4) is originated by
ABRs to tell routers in other areas about the ASBR.

	oli