Q: You need to connect your AWS VPC to an on-premises data center. What are the options and tradeoffs?
Option 1: AWS Site-to-Site VPN
#AWS #Networking & VPC #L3 #Cloud #Infrastructure #VPC
🎙️ Candidate Opening & Architectural Context
""When an interviewer asks how I troubleshoot this in AWS, I frame it through my hands-on production experience. When addressing this question, I walk the interviewer through our production incident runbook: isolating the blast radius, checking diagnostic logs and metrics, and applying a safe fix.""
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🛠️ Production Runbook & Step-by-Step Resolution
1️⃣
Initial Diagnostics & Root Cause Analysis
Option 1: AWS Site-to-Site VPN
- Encrypted tunnel over the public internet.
- Quick to set up (minutes to hours).
- Bandwidth: up to 1.25 Gbps.
- Variable latency (public internet).
- Cost: ~$36/month + data transfer.
- Dedicated physical connection to AWS via AWS Direct Connect locations.
- Bandwidth: 1 Gbps to 100 Gbps.
2️⃣
Remediation & Permanent Safeguards
Option 2: AWS Direct Connect Option 3: VPN over Direct Connect Choose VPN for quick/cheap connectivity. Choose Direct Connect for high bandwidth, compliance requirements (data never on public internet), or consistent latency needs.
- Consistent low latency.
- Takes weeks to months to provision.
- Higher cost but predictable.
- Encrypted VPN tunnel over the Direct Connect private circuit.
- Get Direct Connect speed + VPN encryption.
💡 The Senior SRE Gold Nugget (Key Architectural Takeaway)
"Pro-Tip: Encrypted tunnel over the public internet.."
⚡ 60-Second Elevator Pitch Talking Points
- Encrypted tunnel over the public internet.
- Quick to set up (minutes to hours).
- Bandwidth: up to 1.25 Gbps.
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