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- Posted on
- Saad Ahmed
May 5, 2005, 11:12 pm
rate this thread
I labbed this one up with an AREA 1 NSSA DEFAULT-INFORMATION-ORIGINATE on
the ABR bordering areas 0 and 1.
Both LSA 3 and 4 show up as O IA so some of these may be blocked and any
type of O E would be blocked as LSA 5 and would not show up in the Area 1
(excluding the ABR).
O, O IA, O N2, O*N2 are all seen in NSSA area 1.
Hmmmmmm... it seems to me that the word "support" is rather ambiguous.
In OSPF the nssa blocks only type 5 lsa and instead allows type 7 lsa.
But nssa nosummary blocks type 3, type 4 and type 5 and allows type 7
Hence in nssa the allowed lsa are
and type 7
therefore the answer to the above question should be,
a, b, c
A. because its type 1 and type 2 lsa
b because, type 3 and type 4 lsa are allowed
c because, type 7 is used instead of type 5
d and e are incorrect because * indicates a default candidate but
since its a nssa area not nssa nosummary there will be no default
candidate as type 1 to 4 are allowed and type 5 is replaced by type 7.
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