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300-410 Practice Question: Runs the following command to troubleshoot BFD…

A network engineer runs the following command to troubleshoot BFD with BGP:

R1# show bgp ipv4 unicast 10.3.3.0/24

BGP routing table entry for 10.3.3.0/24, version 2 Paths: (1 available, best #1, table default) Advertised to update-groups: 1 Refresh Epoch 1 Local

10.1.1.2 from 10.1.1.2 (2.2.2.2)

Origin IGP, metric 0, localpref 100, valid, external, best rx pathid: 0, tx pathid: 0x0 BFD enabled, BFD state: UP

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

✓

BGP is using BFD with state UP, enabling sub-second failure detection for this prefix.

The output shows that BFD is enabled for the BGP session and the BFD state is UP, indicating fast failure detection for the BGP neighbor.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✓

    BGP is using BFD with state UP, enabling sub-second failure detection for this prefix.

    Why this is correct

    BFD is enabled and UP, allowing BGP to detect failures faster than BGP keepalive/hold timers.

  • ✗

    BFD is disabled for this BGP neighbor.

    Why it's wrong here

    The output shows 'BFD enabled'.

  • ✗

    BFD state is DOWN, so BGP uses its own timers.

    Why it's wrong here

    BFD state is UP, not DOWN.

  • ✗

    BGP is using BFD only for IPv6 prefixes.

    Why it's wrong here

    This is an IPv4 unicast prefix; BFD is enabled for IPv4.

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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.