Quick Answer
The answer is 180 seconds. The LDP default keepalive timer is set to 180 seconds on Cisco IOS-XE routers to verify that the LDP session remains active when no other Label Distribution Protocol messages, such as label advertisements or notifications, are being exchanged. If no keepalive message is received within this interval, the session is torn down, triggering a new discovery process. On the CCNP ENARSI 300-410 exam, this value tests your understanding of LDP session maintenance and is often contrasted with the default hello timer of 5 seconds, which is a common trap—students frequently confuse the two. Remember that the keepalive timer is much longer because it only needs to confirm session liveness, not neighbor discovery. A simple memory tip: think of the keepalive as a "three-minute check-in" (180 seconds), while the hello is a "five-second handshake."
This 300-410 practice question tests your understanding of mpls operations. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
What is the default LDP keepalive timer value on Cisco IOS-XE routers?
180 seconds
The default LDP keepalive timer is 180 seconds.
120 seconds
Why wrong: 120 seconds is the default hold time for OSPF on non-broadcast networks.
60 seconds
Why wrong: 60 seconds is the default LDP hello hold time, not keepalive.
300 seconds
Why wrong: 300 seconds is the default BGP keepalive timer.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
180 seconds
The default LDP keepalive timer is 180 seconds, which is used to maintain the LDP session if no other messages are exchanged.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
180 seconds
Why this is correct
The default LDP keepalive timer is 180 seconds.
Related concept
Read the scenario before looking for a memorised answer.
120 seconds
Why it's wrong here
120 seconds is the default hold time for OSPF on non-broadcast networks.
60 seconds
Why it's wrong here
60 seconds is the default LDP hello hold time, not keepalive.
300 seconds
Why it's wrong here
300 seconds is the default BGP keepalive timer.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 300-410 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
MPLS Operations — This question tests MPLS Operations — Read the scenario before looking for a memorised answer..
The correct answer is: 180 seconds — The default LDP keepalive timer is 180 seconds, which is used to maintain the LDP session if no other messages are exchanged.
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 18, 2026
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.
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