mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show mpls l2transport vc 100 detail
Local interface: Gi0/0/0 up, line protocol up Destination: 10.0.0.2, VC ID: 100, VC status: down Last error: No remote LDP session
Based on this output, what is the most likely cause of the VC being down?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The LDP session between the routers is not established.
The output explicitly states 'No remote LDP session' as the last error. This indicates that the LDP session between the two routers (10.0.0.1 and 10.0.0.2) is not established, which is required for the pseudowire to come up.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The local interface Gi0/0/0 is administratively down.
Why it's wrong here
The interface is up and line protocol up.
- ✗
The remote router 10.0.0.2 is not reachable via IP.
Why it's wrong here
The error is specifically about LDP session, not IP reachability.
- ✓
The LDP session between the routers is not established.
Why this is correct
The last error confirms 'No remote LDP session'.
- ✗
The VC ID 100 is mismatched on the remote router.
Why it's wrong here
VC ID mismatch would show a different error, like 'VC ID mismatch'.
Go deeper
Related to this question
Learn chapter
Introduction to ENARSI Exam and Network Fundamentals
Key term
MPLS Label Distribution
MPLS Label Distribution is the process by which routers exchange labels that tell them how to forward packets across a network without looking at the IP address each time.
Key term
LDP Protocol
LDP, or Label Distribution Protocol, is a protocol that routers use to automatically exchange labels that enable MPLS (Multiprotocol Label Switching) to create fast, efficient paths for data packets across a network.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.