Refer to the exhibit. Will redistributed RIP routesfrom OSPF Area 2 be allowed in Area 1?
A.
Because Area 1 is an NSSA, redistributed RIP routeswill not be allowed.
B.
Redistributed RIP routes will be allowed in Area 1 because they will be changed into type
5 LSAs in Area 0 and passed on into Area 1.
C.
Because NSSA will discard type 7 LSAs, redistributed RIP routes will not be allowed in
Area 1.
D.
Redistributed RIP routes will be allowed in Area 1 because they will be changed into type
7 LSAs in Area 0 and passed on into Area 1.
E.
RIP routes will be allowed in Area 1 only if they are first redistributed into EIGRP.
Explanation:
Because Area 1 is a Not-so-stubby-area (NSSA), we can inject EIGRP routes into the OSPF
NSSA domain with the creation of type 7 LSAs. Redistributed RIP routes are not allowed in
Area 1 because NSSA is an extension to the stub area (recall that a stub area does not
accept external route unless it is connected through a ASBR, doing that will make it become
a NSSA). The type 7 LSAs are converted to Type 5 LSAs when flooded into Area 0 by the
ABR router.