JNCIS-ENT Tunnels Practice Question
When troubleshooting a non-functional GRE tunnel on a Junos device, which TWO operational commands or verification steps are most effective for diagnosing the root cause? (Choose two)
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
✓
Verify that the routing table has an active path to the remote tunnel destination IP address.
Checking interface extensive statistics and verifying route reachability to the tunnel destination are primary troubleshooting steps.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Verify that the routing table has an active path to the remote tunnel destination IP address.
Why this is correct
Without reachability to the destination endpoint, the tunnel cannot pass encapsulated traffic.
- ✗
Execute 'clear gre statistics' to restart the tunnel encapsulation engine.
Why it's wrong here
Clearing statistics does not restart or fix tunnel encapsulation issues.
- ✗
Check that the RSVP bandwidth reservation is set to 100% on the tunnel interface.
Why it's wrong here
RSVP bandwidth reservation is not required for GRE tunnels.
- ✓
Run 'show interfaces gr-0/0/0 extensive' to check for error counters, input/output drops, and correct source/destination parameters.
Why this is correct
This command reveals physical/tunnel operational state, drops, and configuration verification.
- ✗
Verify that the BGP AS path matches the tunnel ID.
Why it's wrong here
BGP AS path has no relationship with tunnel IDs.
About these practice questions
This JNCIS-ENT question is part of Courseiva's 519-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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 JNCIS-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 JNCIS-ENT exam.