Click the Exhibit button.
What will be two results of the OSPF configuration shown in the exhibit? (Choose two.)
A.
A default route will be advertised into Area 1 as a Type 7 LSA.
B.
Area 0 will not generate summary LSAs for networks in Area 1.
C.
There will be no Type 3 LSAs in Area 1.
D.
Only Type 7 LSAs will be present in Area 1.
I think that correct answers are: AC
3
5
It should be C instead of B because:
An NSSA area allows type 7 LSAs, which represent external routes flooded within the area, along with type 1, type 2, and type 3 LSAs. NSSA areas do not allow LSA type 4 and type 5. Note that the Junos OS allows you to also restrict type 3 LSAs in NSSA areas using the no-summaries configuration option.
3
5
Mic you said NSSA will allow LSA 7,1,2,3 and answer B is correct but answer C stated that There will be no Type 3 LSAs in Area 1. so how come is correct i think A and B is correct
1
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i seen this in juniper website which make option C wrong
type-7—(Optional) Floods Type 7 default LSAs into the NSSA if the no-summaries statement is configured. By default, when the no-summaries statement is configured, a Type 3 LSA is injected into NSSAs for Junos OS release 5.0 and later. To support backward compatibility with earlier Junos OS releases, include the type-7 statement.
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/ospf-stub-and-not-so-stubby-areas.html
2
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A, B id fine.
https://www.juniper.net/documentation/en_US/junos/topics/example/ospf-not-so-stubby-area-configuring.html
1
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^ Hi Sam,
What you mentioned is for “type-7” keyword with no-summary configured.
If you see the main part above the sub section, it says this –
no-summaries—Prevents the ABR from advertising summary routes into the NSSA.
The option B in the answer seems a little vague-
“Area 0 will not generate summary LSAs for networks in Area 1.”
Area 0 doesn’t have to bother about other areas. It is the role if Area 1 ABR to take care of letting in proper LSAs for that area.
I think the answer is A,C
3
0
It’s A and C.
2
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On the ABR, restrict summary LSAs from entering the area.
[edit protocols ospf area 0.0.0.9 nssa]
user@host# set no-summaries
0
0
NSSA no-summary so in area 1 only type 1 + 2 + 7 will be allowed
B Not correct because summary LSA is generated via ABR router
the answer is A & C
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I was thinking A & C as well. Can anyone confirm?
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