Exam 300-510 topic 1 question 174 discussion

Actual exam question from Cisco's 300-510

Question #: 174
Topic #: 1

Refer to the exhibit.

A network consultant is updating the company’s MPLS solution and configuring several new PE devices to enable full communication among PE devices connected to the network. The updates must ensure the redundancy and scalability of the network. The egress LSR is configured with mpls ldp explicit-null. While configuring the given PE router to be adjacent to the egress LSR, the consultant notices that MPLS forwarding is not working in the network. Which action resolves the issue?

A. Open TCP and UDP ports 179.
B. Configure Cisco Express Forwarding on all routers in the MPLS network.
C. Configure MVRF on all routers in the MPLS network.
D. Open TCP and UDP ports 464.

Show Suggested Answer

Suggested Answer: B 🗳️

by DUsoo at April 9, 2024, 9:12 a.m.

Comments

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74ff862

10 months, 1 week ago

Selected Answer: B

B is correct, without CEF, MPLS forwarding won't work.

upvoted 1 times

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74ff862

10 months, 1 week ago

B is correct, without CEF, MPLS forwarding won't work.

upvoted 1 times

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snowbow

1 year ago

Selected Answer: B

Nothing else makes sense

upvoted 1 times

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DUsoo

1 year, 1 month ago

Selected Answer: D

Why we should configure CEF on all routers in the MPLS network?? MPLS is already running and we want to add only few new PEs routers. What we need is to be open TCP/UDP port 464, which is needed for LDP discovery/ session build

upvoted 1 times

a20f227

1 year ago

If I'm not wrong the LDP port is the 646 and not the 464 listed in answer D.

upvoted 4 times

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