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In the exhibit, Area 1 is a not-so-stubby area. Three networks are redistributed into Area 1 on R2. You must summarize the redistributed network addresses in Area 1 so that only one network prefix is re-advertised into Area 0. You must also summarize the loopback addresses of R1 and R2 into a single address in Area 0.Which configuration sample on R3 and R5 will complete this task?
A.
Option A
B.
Option B
C.
Option C
D.
Option D
Configure a not-so-stubby area (NSSA). An NSSA allows external routes to be flooded within the area. These routes are then
leaked into other areas.
Hi, is the configurations missing here?
I cannot see any configuration.
when the area 1 is NSSA then why he has not summarised both the network under NSSA
Currently it is …..
set protocols ospf area 0.0.0.1 nssa area-range 192.168.0.0/16
set protocols ospf area 0.0.0.1 area-range 192.168.1.0/30
In my view answer should be option B.
set protocols ospf area 0.0.0.1 nssa area-range 192.168.0.0/16
set protocols ospf area 0.0.0.1 nssa area-range 192.168.1.0/30
area-range
Syntax
area-range network/mask-length ;
Description
(Area border routers only) For an area, summarize a range of IP addresses when sending summary link advertisements (within an area). To summarize multiple ranges, include multiple area-range statements.
For a not-so-stubby area (NSSA), summarize a range of IP addresses when sending NSSA link-state advertisements. The specified prefixes are used to aggregate external routes learned within the area when the routes are advertised to other areas. To specify multiple prefixes, include multiple area-range statements. All external routes learned within the area that do not fall into one of the prefixes are advertised individually to other areas.
Default
By default, area border routing devices do not summarize routes being sent from one area to other areas, but rather send all routes explicitly.