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Exam 200-301 topic 1 question 429 discussion

Actual exam question from Cisco's 200-301

Question #: 429
Topic #: 1

Refer to the exhibit. An engineer configured the New York router with static routes that point to the Atlanta and Washington sites. Which command must be configured on the Atlanta and Washington routers so that both sites are able to reach the loopback2 interface on the New York router?

A. ipv6 route::/0 Serial 0/0/0
B. ipv6 route::/0 Serial 0/0/1
C. ipv6 route:0/0 Serial 0/0/0
D. ip route 0.0.0.0 0.0.0.0 Serial 0/0/0
E. ipv6 route::/0 2000::2

Show Suggested Answer

Suggested Answer: A 🗳️
Reference:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_pi/configuration/xe-3s/iri-xe-3s-book/ip6-route-static-xe.html#GUID-85796C3A-3143-4DF7-B9D0-
8EC87D0DB08B

by bwg at June 3, 2021, 1:58 a.m.

Comments

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kokoyul

Highly Voted 3 years, 8 months ago

The static routes are: Network + Interface (Source interface) or Next Hop (IP Address Neighbor). So, you have 4 possibilities: Atlanta = ipv6 route::/0 2012::2/126 or Atlanta = ipv6 route::/0 Serial 0/0/0 _______________________________________ Washington= ipv6 route::/0 2023::2/126 or Washington= ipv6 route::/0 Serial 0/0/0

upvoted 23 times

Pkard

3 years, 7 months ago

Agree. When you use a interface as the next hop, it is the interface of the sending router.

upvoted 3 times

redivivo

3 years ago

when you use an interface as the next hop, it's the interface of the next router, not the sending one. As kokoyul stated : Network (destination) + Exit interface (of the sending router) OR Network (destination) + Next hop (ip address of ingress interface of the neighbor router, the next one .

upvoted 4 times

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aike92

Highly Voted 3 years, 5 months ago

IMO i would imagine the actual question stating "(Choose two)" at the end to close out the question leaving the answers to be A &' B.. But if the question is given as-is &' i could only choose One answer, E is the only choice that can apply to BOTH Atlanta &' Washington Routers.

upvoted 6 times

Shamwedge

3 years, 4 months ago

This was my logic and why I chose E

upvoted 6 times

reagan_donald

3 years, 4 months ago

First router must know how to reach the loopback interface....1 option is to use next-hop, 2nd option is to use his egress interface (exit interface) A is correct

upvoted 6 times

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MEDO95

2 years, 5 months ago

totally same as u. Cisco play us hard

upvoted 2 times

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3040636

Most Recent 8 months ago

Shouldn't there be two answers for this question? for Atlanta the next hop is s0/0/0 so the route is ipv6 route::/0 s0/0/0. and for Washington the next hop is s0/0/1 so the route is ipv6 route ::/0 s0/0/1.This question is a bit confusing.

upvoted 3 times

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[Removed]

1 year, 3 months ago

Selected Answer: A

A is correct

upvoted 2 times

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923ffda

1 year, 3 months ago

why that isn't c?

upvoted 1 times

Macarong

5 months, 2 weeks ago

they dont use ipv4 address

upvoted 1 times

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Amr_001

1 year, 9 months ago

I believe E is the correct answer because if you set outgoing int in the ipv6 route, you need to mention the next-hop link-local address

upvoted 2 times

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[Removed]

2 years, 9 months ago

Are you guys sure its not A (for the Atlanta route) and B (for the Washington route)? Because i thought the next hop for Atlanta would be Serial 0/0/0 and the next hop for Washington would be Serial 0/0/1. I may be wrong tho.

upvoted 4 times

A7med97

2 years, 8 months ago

s0/0/0, its exit interface for both Atlanta and Washington

upvoted 3 times

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whojabagooya

2 years, 12 months ago

A is the correct answer. The answer to this question is in the illustration of question # 209. The answer is the static default route of both routers.

upvoted 2 times

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Mozah

3 years, 6 months ago

ipv6 route ::/0 out interface OR ipv6 route ::/0 next hop IP address In this case the out int for Atlanta and Washington to New york is s0/0/0 means A its correct

upvoted 2 times

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ProgSnob

3 years, 6 months ago

I believe it's A. There's no ip route command that calls out the Loopback 2 address directly so we need to use ip route ::/0. The exit interface for each of the routers is Serial 0/0/0.

upvoted 3 times

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Hodicek

3 years, 7 months ago

I Would say A and B , as we can't use the same command for both 2 routers

upvoted 4 times

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dave1992

3 years, 8 months ago

E should be the correct answer. a default static route of ::/0 to reach 2000::2 which is the loopback of the NY router. trying to make sense of the answer givin is wrong. A is not the correct answer. otherwise B would also be the correct answer.

upvoted 4 times

Nicocisco

3 years, 4 months ago

How Atlanta & Washinton know where is 2002::2? Just New-york has been was configured

upvoted 3 times

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CozTurk

3 years, 9 months ago

I am confused with how the answer is A here - Are we sure this is not a typo or a question requiring 2 answers? Can someone please elaborate? The question is asking to enter the static routes from the perspective of the ATLANTA and WASHINTON routers hence making the next hop interfaces S0/0/1 for Washington and S0/0/0 for Atlanta. Shouldn't this mean A and B are correct?

upvoted 2 times

reagan_donald

3 years, 4 months ago

both of them is using same command, because both of them same egress interfaces, Default route is as well static route.

upvoted 1 times

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Asymptote

3 years, 11 months ago

it point the ::/0 using both Alanta and Washington serial interface S0/0/0 , so both of them using the same command .

upvoted 4 times

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Dibilili

3 years, 11 months ago

If A is correct, why B isn`t?

upvoted 3 times

CiscoTerminator

3 years, 11 months ago

S0/0/1 is not the exit interface facing New York on both routers hence its wrong.

upvoted 1 times

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bwg

4 years ago

Why E is wrong?

upvoted 4 times

CiscoTerminator

3 years, 11 months ago

E is wrong becoz its not the correct next hop IP for both routers. Qstn requires one command that works for both routers.

upvoted 1 times

dsmitd33

1 month, 1 week ago

To clear up what you said, loopback addresses in general can never be next hop addresses as they are not a part of the subnet due to not being directly connected to the source device. the next hop as to be one of the active interfaces that is directly connected.

upvoted 1 times

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IvanEaxm171

5 months, 2 weeks ago

Why. Questoin state: both sites are able to reach the loopback2 interface on the New York router. According to the questoin, lookback2 of new york is 2000::2/128. So, Answer E - ipv6 route::/0 2000::2, is a also a correct answser.

upvoted 1 times

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