NSSA Type 1 and 2 Vs E1 and E2

From: mam phuquoc (mamphuquoc@gmail.com)
Date: Tue Aug 07 2007 - 17:55:26 ART


Hi all,

question, if there is an ABR router with some interfaces in area 0 and other
interfaces in nssa area 5. If there is an external route redistributed in
to area 0 as a type E1, and the same route is redsitributed into nssa area
5, the router acting as the abr will see both in the ospf database, but
which one will it use and put in the routing table, the nssa route, or the
E1 route from area 0?

   area0 ----------------------------------------
ABR----------------------------------nssa 5

announcing route 10.0.0.0 -------> <---------------announcing
route 10.0.0.0

It looks like to me the ABR is using the NSSA route and puts it in the
routing table, but why I can't understand. Please share your thoughts.

Thanks.



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