ANS-C01 Network Management and Operations Practice Question
A company has a Direct Connect connection with multiple virtual interfaces (VIFs). The network team notices that traffic to a specific VPC is intermittently failing. The team suspects an issue with BGP routing. Which THREE steps should the team take to troubleshoot the BGP session? (Choose THREE.)
⚠ Common exam trap
AWS often tests the distinction between physical connectivity checks (like endpoint health) and BGP-specific troubleshooting steps, leading candidates to select options that address layer 1/2 issues instead of the BGP routing layer.
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
✓
View the BGP route advertisements received by the on-premises router from AWS.
Viewing the BGP route advertisements received by the on-premises router from AWS directly reveals whether the expected prefixes are being advertised. If the routes are missing or incorrect, the VPC traffic will fail intermittently, making this a primary troubleshooting step for BGP routing issues.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
View the BGP route advertisements received by the on-premises router from AWS.
Why this is correct
This helps identify if AWS is advertising the expected routes.
- ✗
Check the Direct Connect endpoint health in the AWS Management Console.
Why it's wrong here
Direct Connect endpoints are on-premises; AWS console shows connection status, not endpoint health.
- ✓
Verify the allowed prefixes configuration on the virtual interface in the AWS console.
Why this is correct
If allowed prefixes do not match, routes may be rejected.
- ✗
Examine VPC Flow Logs for dropped packets on the virtual interface.
Why it's wrong here
Flow logs do not show BGP-level information.
- ✓
Check the BGP session status using the 'bgp session' command on the on-premises router.
Why this is correct
BGP session state (e.g., Established) indicates the health of the session.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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