mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to troubleshoot an…
A network engineer runs the following command to troubleshoot an MPLS L3VPN issue:
R1# show mpls ldp neighbor detail
Output: Peer LDP Ident: 10.0.0.2:0, Local LDP Ident: 10.0.0.1:0 TCP connection: 10.0.0.2.646 - 10.0.0.1.17905 State: Oper, Msg sent: 123, Msg rcvd: 456 Up time: 1w2d LDP discovery sources: GigabitEthernet0/0, Src IP addr: 10.12.0.2 Addresses bound to peer LDP Ident:
10.0.0.2 10.12.0.2
Peer hold time: 15 sec
What does this output indicate?
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 is up and stable
The output shows LDP neighbor details. The peer is 10.0.0.2, the session is operational (State: Oper) and has been up for 1 week and 2 days. The discovery source is GigabitEthernet0/0 with source IP 10.12.0.2. The peer's addresses include 10.0.0.2 (loopback) and 10.12.0.2 (interface).
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 LDP session is up and stable
Why this is correct
State is Oper, up time is 1w2d, indicating a stable session.
- ✗
The LDP session is using UDP
Why it's wrong here
LDP uses TCP, as shown by the TCP connection line.
- ✗
The LDP session is down
Why it's wrong here
State is Oper, meaning operational.
- ✗
The LDP peer is using a different LDP ID
Why it's wrong here
The peer LDP Ident is 10.0.0.2:0, which matches the expected.
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Learn chapter
Introduction to ENARSI Exam and Network Fundamentals
Key term
MPLS Layer 3 VPN
A technology that uses Multiprotocol Label Switching to create secure, scalable virtual private networks that connect multiple sites at the network layer, where the service provider manages routing between customer sites.
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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Same concept, more angles
1 more way this is tested on 300-410
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A network engineer runs the following command on Router P1: P1# show mpls ldp neighbor Peer LDP Ident: 10.0.0.2:0, Local LDP Ident: 10.0.0.1:0 TCP connection: 10.0.0.2.646 - 10.0.0.1.48632 State: Oper, Msgs sent/rcvd: 120/118, Downstream Up time: 00:12:34 LDP discovery sources: GigabitEthernet0/0, Src IP addr: 10.1.1.2 Addresses bound to peer LDP Ident: 10.0.0.2 192.168.1.1 Based on this output, which statement is correct?
medium- A.The LDP session is down.
- ✓ B.The LDP session is up and functioning correctly.
- C.The router is not receiving label bindings from the neighbor.
- D.The LDP router ID is misconfigured.
Why B: The show mpls ldp neighbor output shows a single LDP neighbor with IP 10.0.0.2. The state is 'Oper' (operational), and the neighbor has been up for 12 minutes. The output indicates a healthy LDP session.
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.