PCNE Practice Question: Managing, Monitoring, and Optimising Network Operations
A company is using Cloud Router with BGP for connectivity to an on-premises network via Partner Interconnect. The BGP session is flapping. Which THREE actions should the engineer take to diagnose the issue?
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 BGP timers (keepalive/hold) match on both sides
Common causes of BGP flaps include MTU mismatch, misconfigured timers, or routing policy issues. Checking MTU, BGP timers, and route advertisements helps identify the root cause.
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 BGP timers (keepalive/hold) match on both sides
Why this is correct
Mismatched timers cause session flaps.
- ✓
Review the BGP route advertisements for policy conflicts
Why this is correct
Routing policy conflicts can cause the session to reset.
- ✗
Disable ECMP on Cloud Router
Why it's wrong here
ECMP does not cause BGP flaps.
- ✓
Check the MTU on the on-premises router
Why this is correct
MTU mismatch can cause BGP session drops.
- ✗
Enable VPC Flow Logs on the interconnect subnet
Why it's wrong here
VPC Flow Logs show traffic flows but not BGP session details.
Go deeper
Related to this question
About these practice questions
Courseiva writes every PCNE question from scratch — 961 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCNE practice question is part of Courseiva's free Google Cloud 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 PCNE exam.