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Exam HPE6-A73 topic 1 question 44 discussion

Actual exam question from HP's HPE6-A73

Question #: 44
Topic #: 1

Examine the network topology.

The network is configured for OSPF with the following attributes:
✑ Core1 and Core2 and ABRs
✑ Area 1 has 20 networks in the 10.1.0.0/16 range
✑ Area 0 has 10 networks in the 10.0.0.0/16 range
✑ Area 2 has 50 networks in the 10.2.0.0/16 range
✑ The ASBR is importing a static route into Area 1
✑ Core2 has a summary for Area 2: area 0.0.0.2 range 10.2.0.0/16 type inter-area
Here is the OSPF configuration performed on Core1:

Based on the above information, what is correct?

A. Area 0 has 13 routes
B. Core1 has no OSPF routes
C. Core1 has received one LSA Type 5 from the ASBR
D. Area 1 has 23 routes

Show Suggested Answer

Suggested Answer: B 🗳️

by poris27 at April 2, 2021, 11:27 a.m.

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NaCin

Highly Voted 3 years, 1 month ago

I think the correct answer is B. Because with "passive interface default" you would need a no passive interface on the Vlan 10 and Vlan 100 interfaces for neighborhoods to be established. C is not possible, because Area is stub not NSSA (Not-so-stuby-Area).

upvoted 14 times

[Removed]

3 years, 1 month ago

Passive Interface prevents it from forming a neighborship, so the core doesn't learn any routes from C2 ( as lomg as there isn't any other active interface). However C1 should at least have OSPF routes to it's directly connected networks and therefore i think B is wrong.

upvoted 3 times

dodds

3 years, 1 month ago

What is your answer then? I think it's B. Because of passive-interface, core1 has no ospf neighbor. core1 probably see 10 connected routes, not ospf routes. So A seems to be wrong

upvoted 2 times

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Davidkanigui

Highly Voted 2 years, 11 months ago

D is correct because area 1 is a Stub area, 2 routes for the inter-area networks + 1 default route from the ABR will be injected in Area in addition to the 20 route = 23 Student Guide Vol 1 Rev 20.21 page 403

upvoted 9 times

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SeidorBruno

Most Recent 11 months, 1 week ago

Selected Answer: B

Page 332 Study Guide: If you are only enabling OSPF on the VLAN because you want to advertise its subnet, and you do not want the router to form adjacencies with other routers on the VLAN, configure the VLAN as a passive OSPF interface. [Aruba Networks] As no "passive interface default" is Globally defined, no routes are advertised since on the VLANS there is no command "no passive-interface" configured.

upvoted 3 times

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[Removed]

1 year, 2 months ago

B is correct. If you do a 'passive interface default' under the global OSPF config, and then do NOT set the interface as 'no ip ospf passive', you get no neighbors, hence no OSPF routes.

upvoted 2 times

moe706706

1 year, 1 month ago

Thats the most relevant answer, thank you ! since ip ospf wasnt enabled on interface level using no ip ospf passive then core wont form any adjacencies and wont learn any OSPF routes

upvoted 1 times

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E_Nick

1 year, 8 months ago

Selected Answer: B

B "passive interface defualt"

upvoted 3 times

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NetExpert

1 year, 8 months ago

D is correct

upvoted 2 times

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DIOGENES

2 years, 6 months ago

I read the aruba certified book, I found the answer for the question, Its D. two aggregate routes for inter-area (are0 10.0.0.0/16 and area1 10.1.0.0/16) and 1 default route for the ASBR.

upvoted 3 times

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