JNCIP-ENT IP Telephony Features Practice Question
An IP phone connected to an EX4600 switch fails to power up. You run show poe interface ge-0/0/1 and find the status displays 'Hardware error'. What is the most appropriate troubleshooting step?
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
✓
Check the switch's power supply units (PSUs) and internal PoE controller status using show chassis power.
A 'Hardware error' status on a PoE port indicates a physical power supply fault, internal PoE controller issue, or physical short circuit on the cable/port.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Check the switch's power supply units (PSUs) and internal PoE controller status using show chassis power.
Why this is correct
Hardware errors point to physical power supply failures or internal PoE controller faults.
- ✗
Reconfigure the port from access mode to trunk mode.
Why it's wrong here
VLAN mode does not influence PoE hardware power delivery states.
- ✗
Modify the LLDP-MED network policy timeout value to allow longer initialization.
Why it's wrong here
Timeouts affect protocol negotiation, not hardware power delivery errors.
- ✗
Disable spanning tree protocol on the interface.
Why it's wrong here
STP blocks traffic forwarding, it does not cause PoE hardware error states.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Juniper Networks exam blueprint
This JNCIP-ENT practice question is part of Courseiva's free Juniper Networks 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 JNCIP-ENT exam.