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300-410 Practice Question: An engineer is troubleshooting an MPLS LDP…
An engineer is troubleshooting an MPLS LDP session that fails to establish between two directly connected routers. Which TWO commands can be used to verify LDP operation? (Choose TWO.)
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
✓
show mpls ldp neighbor
LDP session establishment can be verified using 'show mpls ldp neighbor' to see the state of the session and 'show mpls ldp discovery' to see if LDP hello packets are being exchanged. Option A is correct: 'show mpls ldp neighbor' shows the LDP session state (e.g., OPERATIONAL). Option B is correct: 'show mpls ldp discovery' shows LDP hello adjacency details. Option C is false: 'show mpls ldp bindings' shows label bindings, not session state. Option D is false: there is no 'show mpls ldp session' command; the correct command is 'show mpls ldp neighbor'. Option E is false: 'show ip route' does not show LDP information.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
show mpls ldp neighbor
Why this is correct
Correct. This command displays LDP neighbors and the session state (e.g., OPERATIONAL).
- ✓
show mpls ldp discovery
Why this is correct
Correct. This command shows LDP hello adjacency details, confirming that hello packets are being exchanged.
- ✗
show mpls ldp bindings
Why it's wrong here
Incorrect. This command shows label-to-prefix bindings, not the LDP session state.
- ✗
show mpls ldp session
Why it's wrong here
Incorrect. The correct command is 'show mpls ldp neighbor'. 'show mpls ldp session' is not a valid command.
- ✗
show ip route
Why it's wrong here
Incorrect. 'show ip route' shows the routing table, not LDP-specific information.
Go deeper
Related to this question
Learn chapter
OSPF Neighbor Adjacency and Basics
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.