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300-410 Practice Question: The default LDP keepalive timer value on Cisco…
What is the default LDP keepalive timer value on Cisco IOS-XE routers?
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
✓
180 seconds
The default LDP keepalive timer is 180 seconds, which is used to maintain the LDP session if no other messages are exchanged.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
180 seconds
Why this is correct
Cisco IOS-XE LDP sessions send keepalive messages every 180 seconds by default, satisfying the question's request for the default timer value. This interval is independent of the separate LDP hold time, which defaults to 180 seconds as well but governs session teardown rather than message frequency.
- ✗
120 seconds
Why it's wrong here
LDP keepalive defaults to 180 seconds, not 120, so this value fails the IOS-XE default check. The 120-second figure is tempting because it matches the LDP session hold time derived from the default hello interval, which would be relevant when tuning session expiry rather than identifying the keepalive default.
- ✗
60 seconds
Why it's wrong here
The LDP keepalive default is 180 seconds, not 60; the 60-second value is the LDP hello/hold time on Ethernet links. Confusing the two timers is tempting because both appear in the same LDP configuration context.
- ✗
300 seconds
Why it's wrong here
300 seconds is not the LDP keepalive interval on IOS-XE; it exceeds the 180-second default hold time, which would tear the session down before a keepalive arrived. That figure appears in unrelated timer contexts, not LDP session maintenance.
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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.