Question 186 of 1,840
hardMultiple ChoiceObjective-mapped
350-401 Practice Question: Runs the following command on Router R5: R5# show…
A network engineer runs the following command on Router R5:
R5# show mpls ldp neighbor
Peer LDP Ident: 10.0.0.2:0, Local LDP Ident: 10.0.0.5:0 TCP connection: 10.0.0.2.646 - 10.0.0.5.646 State: Oper; Msgs sent/rcvd: 123/120; Downstream Up time: 01:23:45 LDP discovery sources: GigabitEthernet0/0, Src IP addr: 10.0.1.2 Addresses bound to peer LDP Ident:
10.0.0.2 10.0.1.2 192.168.1.1
Based on this output, what can be concluded?
⚠ Common exam trap
Cisco often tests the misinterpretation of the 'State: Oper' field, where candidates mistakenly think 'Oper' means 'operational down' or 'not operational', when in fact it indicates the session is up and operational.
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 neighbor is reachable via GigabitEthernet0/0.
The 'LDP discovery sources' section shows that the neighbor with source IP 10.0.1.2 was discovered via GigabitEthernet0/0, indicating reachability through that interface. Option D is correct because the 'Up time: 01:23:45' field directly shows the session has been up for 1 hour, 23 minutes, and 45 seconds. Option A is incorrect because 'Oper' means operational, not down. Option C is incorrect because the local LDP identifier is 10.0.0.5:0, not 10.0.0.2:0. Note: This question has two correct answers (B and D).
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 down because the state is 'Oper'.
Why it's wrong here
Incorrect: 'State: Oper' indicates the session is operational (up), not down.
- ✓
The LDP neighbor is reachable via GigabitEthernet0/0.
Why this is correct
Correct: The 'LDP discovery sources' section shows the neighbor was discovered via GigabitEthernet0/0, meaning it is reachable through that interface.
- ✗
The local LDP identifier is 10.0.0.2:0.
Why it's wrong here
Incorrect: The local LDP identifier (the router itself) is 10.0.0.5:0, as shown after 'Local LDP Ident'. The peer identifier is 10.0.0.2:0.
- ✓
The LDP session has been up for 1 hour 23 minutes 45 seconds.
Why this is correct
Correct: The 'Up time: 01:23:45' field shows the session has been up for 1 hour, 23 minutes, and 45 seconds.
Visual reference
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Last reviewed: Jul 4, 2026
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